26 results on '"Dibasic acid"'
Search Results
2. Biooxidation of Fatty Acid Distillates to Dibasic Acids by a Mutant of Candida tropicalis
- Author
-
Sumit Nandi, Santinath Ghosh, and Sarbani Gangopadhyay
- Subjects
chemistry.chemical_classification ,food.ingredient ,Bran ,Dibasic acid ,Ultraviolet Rays ,General Chemical Engineering ,Fatty Acids ,Coconut oil ,Rice bran oil ,food and beverages ,Fatty acid ,General Medicine ,General Chemistry ,equipment and supplies ,complex mixtures ,food ,Vegetable oil ,chemistry ,Biochemistry ,Palm kernel ,Mutation ,Fermentation ,Candida tropicalis ,Food science ,Oxidation-Reduction - Abstract
Fatty acid distillates (FADs) produced during physical refining of vegetable oil contains large amount of free fatty acid. A mutant of Candida tropicalis (M20) obtained after several stages of UV mutation are utilized to produce dicarboxylic acids (DCAs) from the fatty acid distillates of rice bran, soybean, coconut, palm kernel and palm oil. Initially, fermentation study was carried out in shake flasks for 144 h. Products were isolated and identified by GLC analysis. Finally, fermentation was carried out in a 2 L jar fermenter, which yielded 62 g/L and 48 g/L of total dibasic acids from rice bran oil fatty acid distillate and coconut oil fatty acid distillate respectively. FADs can be effectively utilized to produce DCAs of various chain lengths by biooxidation process.
- Published
- 2007
3. Preparation and Properties of Water-Based Cutting Fluids Additives
- Author
-
Shoji Watanabe
- Subjects
chemistry.chemical_compound ,Properties of water ,Materials science ,chemistry ,Dibasic acid ,Organic chemistry - Abstract
Examination was made of the preparation and properties of new types of water-based cutting fluids additives derived from various materials. Attention was directed to synthetic additives classified according to their functional groups : carboxylic acids, esters, dibasic acids, ethers, amides, substituted fatty acids and others. Methods for examining water-soluble cutting fluids additives for laboratory and practical use are described in detail.
- Published
- 1999
4. Evaluation of Toxicity of Lauryl-imino-dicarboxylate by Means of Cytotoxicity Test
- Author
-
Kyu Takeuchi and Masahiko Shimada
- Subjects
Dibasic acid ,Chemistry ,technology, industry, and agriculture ,medicine.disease ,Hemolysis ,Biochemistry ,Pulmonary surfactant ,Toxicity ,medicine ,Membrane fluidity ,Moiety ,Draize test ,sense organs ,Cytotoxicity ,Nuclear chemistry - Abstract
Lauryl-imino-diacetate (LIDA) is an amphoteric surfactant useful as a base for human body detergents. Owing to its stable dibasic acid moiety, application is possible over a wide pH range.In this study, assessment was made of the cytotoxicity of LIDA and other surfactants by NR, WST-1, leakage in LDH and hemolysis. All those methods are alternatives to animal experiments such as the Draize test. Membrane fluidity change of human epidermal keratinocytes by surfactants was detected by polarized light measurement of probe molecules in the cell membrane.LIDA and lauryl-imino-dipropionate (LIDP) showed low cytotoxicity in all cases. Membrane fluidity scarcely changed for LIDA and LIDP, whereas for lauryl-amino-acetate (LAA) and lauryl-amino-propionate (LAP), change was quite clear. The change in fluidity by LAA and LAP may have been related to the induction of cytotoxicity.
- Published
- 1997
5. Content of Sterylglycosides and Dibasic Acids in Commercial Sesame Oil
- Author
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Tateo Murui, Hiroko Seki, and Kou Wanaka
- Subjects
Residue (chemistry) ,Chromatography ,Dibasic acid ,Chemistry ,Oil processing ,Sesame oil ,High-performance liquid chromatography - Abstract
Residual sterylglycosides (SG) and octacosanedioic acid (DA 28) in commercial sesame oil were investigated for 17 brands of 12 manufacturers. A sensitive and precise method was developed to determine DA 28 content in oil. DA 28 was derived from 9-anthryldiazomethane in the presence of triacylglycerol and determined by HPLC equipped with a fluorescence detecter. This method was rapid and applicable to routine analysis.SG and DA 28 content differed considerably according to brand, from 1 to 300 ppm and 0 to 1500 ppm, respectively. The steps in oil processing would thus appear to markedly affect SG and DA 28 residue content
- Published
- 1994
6. Synthesis of Dibasic Acids via Ketone Peroxides from Cycloalkanones
- Author
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Shinji Murai, Masanori Ohta, Noritaka Miyoshi, Noboru Sonoda, and Yoshishige Kida
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,chemistry ,Dibasic acid ,Cyclohexanone ,Organic chemistry ,Sulfonic acid ,Hydrogen peroxide ,Cyclopentanone ,Cycloheptanone ,Peroxide ,Catalysis - Abstract
Preparation of dimethyl dodecanedioate in two steps was studied. The first step is the formation of methoxycyclohexyl peroxide by reaction of cyclohexanone with hydrogen peroxide and methanol in the presence of acid catalyst.The second is the dimerization of the resulting methoxycyclohexyl peroxide through the action of iron (II) sulfate to obtain the dimethyl dodecanedioate. In the first step, sulfonic acid in 0.01010.015 mol per mol of cyclohexanone is used as the catalyst. In the second step, the resulting methoxycyclohexyl peroxide can be used for the dimerization without purification. Various iron (II) salts, such as iron (II) sulfate, iron (II) ammoniumsulfate and ferrous chloride, are effective as the reducing reagents. The reaction can be conducted at a temperature below 10°C. Water should be used in excess in the redox reaction, if it is desired to obtain branched dibasic acid dimethyl esters. Cyclopentanone, cycloheptanone and 2-methylcyclohexanone gave the corresponding dibasic acid dimethyl esters, respectively.
- Published
- 1990
7. Oxidative Cleavage of Palm Stearin Catalyzed by Metal (II) Ion-Exchanged Zeolites
- Author
-
Hisako Shiina, Tian Lye Ooi, Augustine Soon Hock Ong, Yasuhiko Kubota, Satoshi Nakasato, and Hideo Mamuro
- Subjects
chemistry.chemical_classification ,Dibasic acid ,Chemistry ,Carboxylic acid ,chemistry.chemical_element ,Mass spectrometry ,Palm stearin ,Catalysis ,Metal ,visual_art ,Polymer chemistry ,visual_art.visual_art_medium ,Proton NMR ,Organic chemistry ,Carbon - Abstract
Metal (II) ion-exchanged 5A, Y, and X type zeolites were screened to find effective catalysts for oxidative cleavage of palm stearin into mono- and dibasic acids with middle carbon chains.The formation of carboxylic acids was followed by 1H NMR spectrometry. When one reaction was recognized to form volatile material more than the others, it was carried out on a larger scale to collect the volatile material. This material was submitted to GC-MS spectral analysis for identification of individual components.The formation of carboxylic acid was confirmed in the case of products obtained by catalysts such as Mn (II) -5A and Co (II) -Y, but the amount of each was quite small. Analytical results on the volatile materials showed Mn (II) -5A and Co (II) -Cu (II) -Y to contribute to the formation of carbo-xylic acids and aldehydes, respectively.
- Published
- 1986
8. The Reaction of Fatty Acid Esters, Acid Anhydride, and Acid Chloride with Vinylmagnesium Chloride
- Author
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Yukio Takahashi, Shoji Watanabe, Kyoichi Suga, Tsutomu Fujita, and Hideyuki Koiso
- Subjects
chemistry.chemical_classification ,Dibasic acid ,Carboxylic acid ,Propanoyl chloride ,Chloride ,Acid anhydride ,chemistry.chemical_compound ,chemistry ,Yield (chemistry) ,medicine ,Organic chemistry ,Methyl pentanoate ,Fatty acid methyl ester ,medicine.drug - Abstract
Reaction of vinylmagnesium chloride with aliphatic carboxylic acid methyl ester gives a mixture of vinylketone and divinylcarbinol. From methyl pentanoate, a mixture of n-butyl-3-hydroxyl-1, 4-pentadiene and 5-oxo-1-nonene is obtained. While reaction of linear α, β-unsaturated methyl esters with vinylmagnesium chloride yields vinylketones as the main product, the reaction of substituted α, β-unsaturated methyl esters yields triethylenic carbinols. Reaction of acid anhydrides and dibasic acid diesters with vinylmagnesium chloride yields mixtures of alkenones, hydroxy-alkenones and alkenols as the main products. Reaction of acid chloride with excess vinylmagnesium chloride at -40°C to -45°C gives 2-allyl-1, 3-diketones. From propanoyl chloride, a mixture of 4-allylheptane-3, 5-dione (33% yield), 6-heptene-3-one (0.5% yield) and 3-ethyl-1, 4-pentadiene-3-ol (2% yield) is obtained. Reaction of vinylmagnesium chloride with a fatty acid methyl ester in the presence of cuprous chloride gives a 1, 6-diketone. From methyl n-valerate, a mixture of n-tetradecane-5, l0-dione and 5-oxo-1-nonene is obtained.
- Published
- 1974
9. Dibasic Acids Containing Ether Linkages. V
- Author
-
Yoshiro Abe, Atsushi Mochizuki, Takeshi Miura, and Shuichi Matsumura
- Subjects
chemistry.chemical_compound ,Hydrolysis ,chemistry ,Dibasic acid ,Sodium ,Sodium citrate ,Formaldehyde ,chemistry.chemical_element ,Organic chemistry ,Ether ,Chelation ,Ethylene glycol - Abstract
The authors synthesized two series of dibasic acids containing ether linkages, oxadiacetic acids and oxadipropionic acids, which were respectively obtained from polyethylene glycols by the air oxidation and from water or formaldehyde or ethylene glycol by the cyanoethylation and subsequent hydrolysis. Disodium salts of dibasic acids were prepared and compared to the sodium tripolyphosphate (STPP) and sodium citrate with their detergency building action. The detergency tests were carried out on naturally soiled cotton fabrics and the comparison was made by Scheffe's method. The builders employed were sodium tripolyphosphate (STPP) or disodiumsalts of dibasic acids, or sodium citrate, or the mixture of STPP and disodiumsalts of dibasic acids, or the mixture of STPP and sodium citrate. As a result, the oxadiacetic acid series achieved better building performance than oxadipropionic acid series, and in each series, the smaller molecular weight of the test builder showed the better building power. The reason of these results can be explained that oxadiacetic acid formed a five membered ring with calcium, while oxadipropionic acid probably formed a six membered ring and stability difference between the two chelate ring systems caused the difference of their building actions. Another reason is the difference of the molecular weight. This is interpreted as the “Chelating value” or C.V.. To chelate a given amount of metal it requires less quantity of the minor molecular weight builder than that of the higher.
- Published
- 1975
10. Synthesis and Properties of α, ω-Bisamidobetaine-type Amphoteric Surfactants from Long-chain Dibasic Acids
- Author
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Tokuji Takeda, Shin-ichi Ogawa, Keisuke Honda, Masaki Nakamura, and Shingo Yamamura
- Subjects
chemistry.chemical_compound ,Aqueous solution ,chemistry ,Dibasic acid ,Sodium hydroxide ,Organic chemistry ,Halide ,Isopropyl alcohol ,Dispersion (chemistry) ,Sodium chloroacetate ,Catalysis - Abstract
α, ω-Type amphoteric surfactants containing bisbetaine groups were synthesized by reactions of alkanedioic acids with N, N-dimethyl-1, 3-propanediamine, followed by quaternization of the resulting bisaminoamides with sodium chloroacetate. The latter process was carried out in water or a mixture of isopropyl alcohol and water using sodium hydrogencarbonate or sodium hydroxide as the catalyst.The properties of the α, ω-bisamidobetaine in aqueous solution were studied. α, ω-Bisamidobetaines derived from hexadecanedioic and icosanedioic acid showed good catalytic activity for the halide displacement reaction and a excellent ability to bring about lime soap dispersion.
- Published
- 1987
11. Synthesis of Bis (aminimides) and Their Properties
- Author
-
Eiichi Kameyama, Tsunehiko Kuwamura, Hatsumi Nakata, and Seiichi Inokuma
- Subjects
Cloud point ,chemistry.chemical_compound ,Adsorption ,Aqueous solution ,Dibasic acid ,Pulmonary surfactant ,chemistry ,Organic chemistry ,Wetting ,Methylene bridge ,Medicinal chemistry ,Krafft temperature - Abstract
A series of bis (aminimides) (BAI) with a general formula, [RCH (OH) CH2NMe2NCO] 2Y, (R : n-C4n-C10, Y : - (CH2) n-and p-phenylene, n : 08) were prepared by the reactions of diesters of aliphatic and aromatic dibasic acids with aminimines derived from 1, 2-epoxyalkanes and 1, 1-dimethylhydrazine. The yields were 3040% for the aliphatic series and 7080% for the aromatic series. For the aromatic series, it was found that BAI and half aminimide esters were selectively obtained in high yields by the control of molar ratio of aminimide/carboxylic diester. Some surfactant properties of these products were examined and compared with those of corresponding monoaminimides (MAI), RCH (OH) CH2NMe2 NCOR'. BAI without methylene bridge between two aminimide groups have a high Krafft point and are insoluble in water at room temperature, while no Krafft point is observed for BAI with n=28. BAI except for the lower members show a characteristic cloud point in analogy with poly (oxyethylene) type nonionic surfactants. The cloud point decreases linearly with increasing n, but no appreciable effect of n on cmc, aqueous surface tension (γcmc) and molecular area (A0) of adsorption film at air/ water interface are observed. The cmc and γcmc of BAI are slightly higher than those of MAI (4, 5). A0 of BAI is about twice as large as that of MAI. BAI are generally inferior to MAI (4, 5) in wetting and foaming abilities.
- Published
- 1979
12. Microbial Synthesis of ω-Oxidatives such as Dibasic Acids from Aliphatic Compounds
- Author
-
Shigeo Inoue
- Subjects
Dibasic acid ,Chemistry ,Organic chemistry - Published
- 1984
13. Synthesis and Antimicrobial Properties of N-Substituted Amino Acid Type Amphoterics Containing Thioether Linkage
- Author
-
Shuichi Osanai and Yoshiro Abe
- Subjects
Alanine ,chemistry.chemical_classification ,chemistry.chemical_compound ,chemistry ,Thioether ,Dibasic acid ,Stereochemistry ,Monobasic acid ,Alkoxy group ,Ether ,Antimicrobial ,Amino acid - Abstract
N-Substituted glycine-, alanine- and betaine-type amphoteric surfactants containing long chain alkylthio group were synthesized, and their growth inhibitory activities against Gram positive, Gram negative baccili and some fungi were studied. The effect of the alkylthio group on their antimicrobial and surface activities was compared to that of the alkoxy group of the corresponding N-substituted amino acid amphoterics containing alkoxy group. The obtained N-substituted amino acid amphoterics containing alkylthio group generally, have large antimicrobial powers and excellent surface activities except alanine type derivatives. Dibasic amino acid-type amphoterics having an alkylthio group in the molecule were also tested. Their antimicrobial activities were less than those of the corresponding monobasic amino acid-type amphoterics. Furthermore, N-substituted glycine- and alanine- type amphoteric surfactants, which contained the ether and thioether linkages in the long chain were synthesized and their antimicrobial and surface activities were studied. It is found that the antimicrobial powers of N-substituted amino acid type amphoterics containing alkoxy group is enhanced by introducing an additional thioether group in the molecule.The relative position of ether and thioether group apparently affected their antimicrobial activities.
- Published
- 1976
14. Study of Water Soluble Organic Corrosion Inhibitors for Mild Steel
- Author
-
Kazuo Umehara and Yoichi Kato
- Subjects
Homologous series ,chemistry.chemical_compound ,chemistry ,Dibasic acid ,Sodium ,Monobasic acid ,Inorganic chemistry ,chemistry.chemical_element ,Humidity ,Amine gas treating ,Relative humidity ,Corrosion - Abstract
The inhibitive properties of sodium or amine salts of monobasic and dibasic acids for mild steel specimens have been examined in humidity cabinet at 40°C or 50°C and relative humidity 95100%The monobasic and dibasic acids used were monocarboxylic, dicarboxylic, alkylphosphoric, dialkylthiophosphoric, n-octylphosphonic and n-octylmalonic acids, etc. About the almost same length of carbon chain, the sodium salts of dibasic acids with polar group at both ends have most inhibitive efficiency and those of no branched monobasic acids have more efficiency than those of dibasic acids with two polar groups near one end or those of branched monocarboxylic acids. It seems that the inhibitors with the chain length of about 8 carbon atoms are most effective among the homologous series. The influence of pH in sample solution on corrosion greatly increased with increase of pH, especially more than pH 10.Results of indoor exposure test for mild steel indicate that sodium salts of n-octylphosphonic and n-octylphosphonic acid have good inhibitive property, and do not correlate always with results of humidity cabinet test.
- Published
- 1969
15. Preparation of Dibasic Acids from Fatty Acids VIII
- Author
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Masaru Kobayashi
- Subjects
chemistry.chemical_classification ,chemistry ,Biochemistry ,Dibasic acid ,Fatty acid ,Polyunsaturated fatty acid - Published
- 1957
16. Preparation of Dibasic Acids from Fatty Oils. IV
- Author
-
Masaru Kobayashi
- Subjects
chemistry.chemical_classification ,Dibasic acid ,Chemistry ,Fatty acid ,Food science ,Polyunsaturated fatty acid - Published
- 1955
17. Studies on the Glycerides of Dibasic Acids.I
- Author
-
Yoshiaki Nagano and Takehide Tanaka
- Subjects
Paper chromatography ,Linear relationship ,Chromatography ,Dibasic acid ,Chemistry ,Vacuum distillation ,Glyceride ,Japan wax ,Organic chemistry ,Carbon number ,Phase method - Abstract
From the discovery of higher dibasic acids in Japan wax, many investigations were carried out about the structure of the glycerides of dibasic acids. However, these investigations were mainly concerned with the separation of dibasic acid glycerides from Japan wax, and no definite conclusion has yet been established whether it would be monomolecular type or bimolecular type.The purpose of this investigation is determining the structure of higher dibasic acid glycerides synthetically prepared. Synthesis of dibasic acids (C12C22) was carried out according to four different methods and pure C22 dibasic acid was obtained.The paper chromatography of the dibasic acids has been carried out by the reversed phase method using several kinds of stationaly phases, and a linear relationship was observed between Rf value and the carbon number of the acids.By applying this analytical method to the dibasic acid which was separated from Japan wax according to the Tsujimoto's method, it was found that arachidinic acid was also present besides C20 and C22 acids which were previously known, and the ratio of those three acids was determined by molecular distillation.
- Published
- 1961
18. Dibasic Acids and Other Bifunctional Compounds Dirived from the Unsaturated Fatty Acids
- Author
-
Goro Kimura
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,chemistry ,Dibasic acid ,Organic chemistry ,Fatty acid ,Bifunctional ,Polyunsaturated fatty acid - Published
- 1966
19. Studies on the Deterioration of Frying Oils in Continuous Water-spraying and Heating System. L
- Author
-
Etsuji Yuki
- Subjects
chemistry.chemical_classification ,Hydrolysis ,Acid value ,Iodine value ,food.ingredient ,food ,Chromatography ,chemistry ,Dibasic acid ,Glyceride ,Fatty acid ,Fraction (chemistry) ,Soybean oil - Abstract
Condensable volatile decomposition products and free fatty acid in the deteriorated oils were examined to know what kind of reaction may play the main part of deterioration during deep fat frying in the absence or the presence of air.Steam distillated materials from soybean oil under the continuous water-spraying and heating system with and without air blowing, were collected as shown in Fig.-1. Collections were continued during 014, 1428 and 2842 hr respectively. The quantities of acidic, carbonyl and alcoholic fractions of the volatile products at various intervals were determined, and the methyl ester of acidic fractions was gas chromatographed using succinate polyester column and each peak was identified by the tentative method (Fig-3, 6, Table-4, 5). The free fatty acid was isolated from the final deteriorated oils by means of ion-exchange resin and fractionated into monomer, dimer and secondary products by silica gel chromatography mentioned by Frankel et al., and the methyl ester of monomer acid was gas chromatographed (Table-2, 3, Fig.-2). Acid value, viscosity increasing ratio, carbonyl value and iodine value of the deteriorated oils were deteamined every 14 hr heating (Table-1).In the absence of air, free fatty acid in the final deteriorated oil was recovered with the yeald of 99.0% with ion-exchange resin and 93.5% of this acid fraction was monomeric. The composition of monomer acid was practically similar to the constituent acid of original soybean oil. Also, in the volatile products, acidic compound was main product and its composition was almostly similar to that of soybean oil. These results indicate that the free aftty acid increased in the deteriorated oil in the absence of air, was produced by the hydrolysis of triglyceride.In the presence of air, free fatty acid was removed 90.5% by ion-exchange resin and 82.3% of this acid fraction was monomeric. Acidic materials which cannot be removed by ion-exchange resin, was considered as that combined with glyceride. The composition of monomer acid was similar to that of soybean oil. These results indicate that, even in the case of presence of air, the free fatty acid increased in the deteriorated oil was produced mainly by hydrolysis. On the other hand, volatile products were the mixture of acidic, carbonyl and alcoholic compounds, and acidic compounds contained short chain fatty acids, dibasic and keto acids.
- Published
- 1967
20. The Reactions of Dibasic Fatty Acid Esters with Hydrogen Peroxide
- Author
-
Hiromu Kameoka
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,Dibasic acid ,Chemistry ,Carbon dioxide ,Fatty acid ,Organic chemistry ,Hydrogen peroxide ,Polyunsaturated fatty acid ,Catalysis - Abstract
Present research was carried out with the intention of finding the kinds of compounds formed by the action of 30% H2O2 on di-basic fatty acid esters.The sample used was di-methyl ester of succinic-, adipic- and sebasic acid, and reacted without catalyst. By reacting 0.1mol of ester with 2.2mols of 30% H2O2 under the condition of 105° C and 30 hours, it was recognized that the various lower mono- and di-basic fatty acids and lower carbonyl compounds were produced.Fixed quantity of carbon dioxide that produced by these reactions, and from these values, it was recognized that the lower esters were readily reactive than the higher homologue, and di-basic fatty acid esters were more readily oxidized than the mono-basic fatty acid esters.
- Published
- 1960
21. Studies on the Japan Wax by Gas-Liquid Chromatography Using a Hydrogen Flame Ionization Detector
- Author
-
Dainosuke Aikawa, Kimiko Murase, and Yoshihiko Sano
- Subjects
chemistry.chemical_classification ,Acid value ,Wax ,Chromatography ,Dibasic acid ,Silica gel ,Fatty acid ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,visual_art ,Japan wax ,visual_art.visual_art_medium ,Flame ionization detector ,lipids (amino acids, peptides, and proteins) ,Gas chromatography - Abstract
It has already been reported that Japan wax contains higher dibasic acids such as docosanedioic and eicosanedioic acids, but no detailed reports including the lower dibasic acids have been found yet.The purpose of this investigation is to determine accurately the fatty acid and dibasic acid compositions of the wax by gas-liquid chromatography using a hydrogen flame ionization detector.Gas chromatographic analyses were performed on a gas chromatograph of Shimadzu GC-1 B type equipped with a flame ionization detector. U-shaped stainless steel columns of 150cm×4mm i.d., and another 75cm×4mm i.d. for the specified analysis of higher dibasic acid dimethyl esters, were packed with 10% polyethyleneglycol adipate on Diabase B (Kotaki-seisakusho Co., Ltd.), 80-100 mesh. The flow rates of helium as the carrier gas, hydrogen and air for the detector were approx. 60ml/min, 40ml/min and 1.0l/min, respectively. The inlet heater was kept at 280°C, the column temperature was at 215°C for the analysis of fatty acid methyl esters and lower dibasic acid dimethyl esters, and at 220°C for the long-chain dibasic acid dimethyl esters.As a result, different dibasic acids (C5, C6, C7, C8, C9, C10, C11, C12, C14, C16, C18, C20 and C22), various fatty acids (less than C10, C14, C15, C16, C17 C18, C20 and C22) and considerable amounts of unknown materials were found in the free acids responsible for the high acid value (21.5) of the wax.In addition, the methyl esters, obtained by direct methanolysis of the wax and subsequent removal of the free acids, contained small amounts of C14-, C16-, and C18- as well as C20- and C22- dibasic acids.The thin-layer chromatography on silica gel was also applied to the analysis of the wax; namely, it was observed that the dibasic acids were separable from the fatty acids and other materials and that each constituent can be examined in detail.
- Published
- 1964
22. Synthesis of Di- (D-glucose) Dicarboxylate
- Author
-
Norito Uchino, Seishi Machida, and Yasuo Nishizawa
- Subjects
Acylation ,chemistry.chemical_compound ,Dibasic acid ,Chemistry ,D-Glucose ,medicine ,Organic chemistry ,Dimethylformamide ,Sulfuric acid ,Transesterification ,Chloride ,Dimethyl ester ,medicine.drug - Abstract
Di- (1, 2 : 5, 6-diisopropylidene-D-glucose) dicarboxylate was prepared from 1, 2 : 5, 6-diisopropylidene-D-glucose and dimethyl ester of dibasic acid (i.e. adipic, pimelic azelaic and sebacic), by transesterification in dimethylformamide. The same ester was also obtained by acylation of 1, 2 : 5, 6-diisopropylidene-D-glucose with the chloride of the above dibasic acid.The ester thus obtained was converted into di- (D-glucose) dicarboxylate by sulfuric acid. After evaluation studies, a fairly promising emusifying property was found for the latter ester.
- Published
- 1966
23. Corrosion Test of Derivatives of Aromatic Carboxylic Acids and Dibasic Acids
- Author
-
Kyoichi Suga and Shoji Watanabe
- Subjects
inorganic chemicals ,chemistry.chemical_classification ,chemistry.chemical_compound ,chemistry ,Dibasic acid ,organic chemicals ,Phthalate ,Organic chemistry ,lipids (amino acids, peptides, and proteins) ,Amine gas treating ,Alkyl ,Corrosion - Abstract
Various alkyl benzoic acids and half esters of dibasic acids were prepared. Corrosion test for cutting fluids characterization of these compounds were examined. Triethanol amine salts of mono oleil phthalate and acids alkyl (methyl, butyl, pentyl, hexyl and octyl) benzoic acids have excellent properties.
- Published
- 1976
24. Preparation of Dibasic Acids from Fatty Oils (Part 3)
- Author
-
Masaru Kobayashi
- Subjects
chemistry.chemical_classification ,chemistry ,Dibasic acid ,Fatty acid ,Food science ,Polyunsaturated fatty acid - Published
- 1953
25. Studies on the Nitrilation of Dibasic Acid. I
- Author
-
Takenosuke Kurita, Kozo Nakamura, and Shogo Takahashi
- Subjects
chemistry.chemical_classification ,Azelaic acid ,Dibasic acid ,Inorganic chemistry ,Fatty acid ,Frequency factor ,Activation energy ,Catalysis ,Ammonia ,chemistry.chemical_compound ,chemistry ,Mole ,medicine ,medicine.drug - Abstract
Dinitrile is prepared from dibasic fatty acid and ammonia by using dehydrating catalyst at elevated temperature. Authors investigated the amidation reaction of azelaic acid by blowing ammonia gas at comparatively low temperature ranging 150 to 200°C.As a result, order of this reaction was found to be secondary, approximately, to the concentration of the azelaic acid, where the effect of ammonia gas is minimized, and the activation energy was 9.7 5 kcal per mol and frequency factor was 40.26. The reaction velocity was expressed as : kc=40.26e-3.966×103/T at 150 to 200°C
- Published
- 1963
26. Synthesis and Properties of Bis (aminimides) Containing Ether Linkages
- Author
-
Tsunehiko Kuwamura, Eiichi Kameyama, Seiichi Inokuma, and Takao Ohsawa
- Subjects
chemistry.chemical_classification ,chemistry.chemical_compound ,Cloud point ,Aqueous solution ,chemistry ,Dibasic acid ,Bromide ,Polymer chemistry ,Melting point ,Ether ,Alkyl ,Catalysis - Abstract
Several dibasic acid esters containing oxyalkylene units (-OCH2-, -OC2H4-, unit number; 15) were treated with aminimines derived from alkyl (C8C12) glycidyl ethers and 1, 1-dimethylhydrazine, giving a new series of bis (aminimides) with the yields of 3040%. The introduction of ether linkage caused a decrease in melting point and Krafft's point of the bis (aminimides). The lower members regarding m (m
- Published
- 1980
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