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Your search keyword '"István Gács"' showing total 4 results
Start Over Author "István Gács" Journal chemistry letters
4 results on '"István Gács"'

1. A Convenient Procedure for the Acidic Activation of Mineral Bentonite: An Environmentally Friendly Method for the Preparation of Bleaching Earths

Author

Éva Pfeifer, László Kocsis, László Kótai, István Gács, József Lippart, Katalin Papp, Emma Jakab, István E. Sajó, József Valyon, and Gábor Keresztury

Subjects
Mineral, Chemistry, Bentonite, Mineralogy, General Chemistry, Environmentally friendly, Earth (classical element), Nuclear chemistry
Abstract

Refluxing montmorillonite-containing raw bentonite ((Na,Ca)o.33(Al,Mg)2Si 4 O 10 (OH) 2 ) in aq HNO 3 , then neutralizing it with NH 3 produces NH 4 NO 3 -containing NH 4 -bentonite. The NH 4 NO 3 intercalated can be eliminated as a gaseous product (N 2 O and H 2 O) by heating at 400 °C, and the deammoniation and dehydroxylation process of the preactivated bentonite leads to formation of bleaching earth (H x (Al,Mg) 2 -ySi 4 O 10 -(OH) 2 ).

Published
2008
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2. An Efficient Method for the Transformation of High Fatty Acid Containing Vegetable Oils to Biodiesel Fuels

Author

Iate Sándor Holly, István Gács, István E. Sajó, Ernö Tamics, Ágnes Gömöry, Tamas Aradi, László Bihátsi, and László Kótai

Subjects
chemistry.chemical_classification, Biodiesel, chemistry.chemical_element, Fatty acid, General Chemistry, Transesterification, Calcium, Transformation (genetics), chemistry.chemical_compound, chemistry, Organic chemistry, Methanol, Calcium oxide, High fatty acid
Abstract

Transesterification of fatty acid containing used or nonfood type vegetable oils with methanol in the presence of partially hydrated calcium oxide has been performed. The calcium soaps formed are t...

Published
2008
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3. An Environmentally Friendly Method for Removing Sodium in Red Mud

Author

Katalin Papp, István Gács, István E. Sajó, András Bartha, László Kótai, and György Bánvölgyi

Subjects
inorganic chemicals, Chemistry, Sodium, Metallurgy, chemistry.chemical_element, General Chemistry, Aluminium sulfate, respiratory system, complex mixtures, Environmentally friendly, Bayer process, Red mud, respiratory tract diseases, chemistry.chemical_compound, Aluminium, Phase (matter), Sulfate, Nuclear chemistry
Abstract

Iron(III) sulfate or its mixture with aluminium sulfate can be used as a solid phase sulfatizing agent to destroy sodium aluminium silicates in red mud within 2 h at 200–500 °C. These solid phase s...

Published
2006
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4. A Convenient Method to Prepare Alkali- and Chloride-free Ammonium Metavanadate (NH4VO3)

Author

István E. Sajó, Zoltán May, István Gács, László Kótai, and Judit Fodor

Subjects
chemistry.chemical_compound, Ammonium metavanadate, chemistry, Hydrothermal reaction, Inorganic chemistry, medicine, Pentoxide, Vanadium, chemistry.chemical_element, General Chemistry, Alkali metal, Chloride, medicine.drug
Abstract

A convenient method for the preparation of alkali- and chloride-free ammonium metavanadate has been developed. This new process is utilizing a hydrothermal reaction of vanadium pentoxide with ammon...

Published
2006
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