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43,059 results on '"Zhang, Jie"'

1. Synthesis of barium alkylbenzene sulfonate and its behavior as a flow improver for crude oil

Author

Zhou, Zhichao, Zhang, Wangyuan, Zhang, Futian, Zhang, Xuanming, Dong, Sanbao, Zhang, Jie, and Gang, Chen

Subjects
Crude oil, Flow improver, Barium dodecylbenzenesulfonate, Viscosity, Pour point, Biochemistry, QD415-436, Physical and theoretical chemistry, QD450-801, Mathematics, QA1-939
Abstract

The low flow characteristics of heavy oil have brought many challenges to its exploitation. Looking for a cost-effective crude oil flow improver to reduce the viscosity of heavy oil is currently the most important challenge. Small-molecule crude oil flow improvers meet the above requirements and become an ideal target for oilfield heavy oil production. In this article, three kinds of barium salts of alkylbenzene sulfonates with different lengths of alkyl chains were synthesized from alkylbenzene sulfonic acid and barium hydroxide. Among them, the viscosity reduction effect of barium dodecylbenzenesulfonate (BaDBS) is best as the dosage is 900 mg/L, the viscosity reduction rate is 89.0%, and the pour point is reduced by 5 °C. Optical microscopy revealed the eutectic effect of crude oil flow improver and saturated hydrocarbon in heavy oil. FTIR and DSC were used to research the mechanism of small-molecule crude oil flow improver to reduce the viscosity of heavy oil.

Published
2021
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2. Catalytic oxidation of polymer used in oilfield by supported Co(II) complex within a high pH range

Author

Ma, Liwa, Zhao, Furong, Zhang, Jianqing, Ma, Guoyan, Zhao, Yifei, Zhang, Jie, and Chen, Gang

Subjects
Bentonite supported complex, Catalytic oxidation, Oilfield wastewater, Hydroxypropyl guar gum, Fenton like process, Biochemistry, QD415-436, Physical and theoretical chemistry, QD450-801, Mathematics, QA1-939
Abstract

In this study, a clean oxidation process for the treatment of wastewater containing hydroxypropyl guar gum (HPGG) and other polymers under a high pH range was designed. For that, 5-sulfosalicylic acid (L)-Co(II) complex supported on bentonite (B) (B@Co(II)L) was prepared for treatment of wastewater by hydrogen peroxide ($\mathrm{H}_{2}\mathrm{O}_{2}$). The morphology and pore structure of B@Co(II)L was first characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier infrared spectrometer (FT-IR), and $\mathrm{N}_{2}$ adsorption–desorption isotherms, after which the catalytic performance was investigated for the treatment of polymer wastewater. Results show that B@Co(II)L performed high catalytic performance in a wide range of 7.0 to 13.0. The viscosity of the HPGG can be decreased effectively from 22 to 2.5 mm$^{2}$/s under the optimal conditions of 45 °C, pH 10.0, 10% $\mathrm{H}_{2}\mathrm{O}_{2}$ (mass ratio to HPGG), and 10% B@Co(II)L (mass ratio to $\mathrm{H}_{2}\mathrm{O}_{2}$), and the removal rate for chemical oxygen demand (COD) of HPGG, CMC, and PAM reached to 95.9%, 94.8%, and 93.7%, respectively, within 240 min. Most of all, by applying the catalyst in the oilfield, it was found that the catalyst has high performance and the removal rate for COD of oilfield wastewater, fracturing fluids, and drilling fluid can be achieved by 92.1%, 94.2%, and 90.7%, respectively.

Published
2021
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3. Synergistic effect of octadecyl ammonium oxide and oleate amide propyl betaine and development of a foam drainage reagent for natural gas production

Author

Gao, Minlan, Jia, Yijing, Lv, Shiyi, Dong, Sanbao, Wang, Manxue, Zhu, Shidong, Zhang, Jie, and Chen, Gang

Subjects
Surfactant, Oleate amide propyl betaine, Octadecyl ammonium oxide, Foaming, Synergistic effect, Biochemistry, QD415-436, Physical and theoretical chemistry, QD450-801, Mathematics, QA1-939
Abstract

Betaine surfactants are used widely in oil field chemistry as well as other industrial applications, but their foaming ability is very poor so that it cannot be used in foaming. In this work, the effect of octadecyl ammonium oxide on the foam properties of oleate amide propyl betaine, a new compound foaming reagent, is studied based on foam performance. Then, a foam drainage reagent of 0.5 wt% oleate amide propyl betaine and 0.1 wt% octadecyl ammonium oxide is developed for natural gas production. Its salt resistance, methanol resistance, high temperature resistance, anti-condensate oil performance, and emulsification ability are systematically evaluated. Furthermore, the factors affecting foam performance are analyzed. The results show that the compound foaming reagent has good anti-salt, anti-methanol, and anti-condensate oil properties for meeting application requirements. The microstructures of foams derived from different reagents reveal the stability mechanism. All results reflect the fact that compounding can expand their application range in different environments to various extents, which benefits the design and use of compound surfactants.

Published
2021
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4. Modification of sodium dodecyl sulfate and evaluation of foaming activity

Author

Gao, Minlan, Chen, Gang, Bai, Yun, Zhang, Rongjun, Zhang, Jie, Zhu, Shidong, Zhang, Zhifang, and Dong, Sanbao

Subjects
Surfactant, Synthesis, Modified sodium dodecyl sulfate, Foaming, Mannich reaction, Biochemistry, QD415-436, Physical and theoretical chemistry, QD450-801, Mathematics, QA1-939
Abstract

In this study, to optimize the foaming activity of sodium dodecyl sulfate (SDS), modified sodium dodecyl sulfate surfactants (MSDS-1 and MSDS-2) are prepared by using methanol and diethanol amine as modifiers by the Mannich reaction. The foaming properties and foam stability of the products are evaluated by the Ross–Miles method and the Waring blender method. The microstructures of the foams produced by three surfactants are compared. The effects of temperature, inorganic salt, methanol, and condensate oil on the foaming activity of SDS, MSDS-1, and MSDS-2 are studied. The results obtained show that the best foaming concentration of all three products is 0.5%. Compared with SDS, the temperature resistance, methanol resistance, salt resistance and anti-condensate oil performance of MSDS-1 and MSDS-2 are improved. Among them, the temperature resistance, salt resistance, and methanol resistance of the MSDS-1 solution are the best. The MSDS-2 solution has the best anti-condensate performance. Besides, the foam size becomes smaller, the foam wall thickens, and the foam stability is improved after modification. The overall performance of SDS as a foaming agent can be improved by the Mannich modification.

Published
2020
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18. Patient-Reported Outcomes of Postoperative NSCLC Patients with or without Staged Chinese Herb Medicine Therapy during Adjuvant Chemotherapy (NALLC 2): A Randomized, Double-Blind, Placebo-Controlled Trial

Author

Zhang, Yi-lu, Jiao, Li-jing, Gong, Ya-bin, Xu, Jian-fang, Ni, Jian, Shen, Xiao-yong, Zhang, Jie, Zhou, Di, Qian, Cheng-xin, Wang, Qin, Yao, Jia-lin, Yang, Wen-xiao, Su, Ling-zi, Wang, Li-yu, Li, Jia-qi, Yao, Yi-qin, Zhang, Yuan-hui, Wang, Yi-chao, Chen, Zhi-wei, and Xu, Ling

Published
2024
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