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Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: олеат натрия; соли смоляных кислот живичной канифоли; сульфид натрия; сероводород; октадекантиол; присоединение тиолов; сернистые соединения
In order to study attachment of hydrogen sulfide and methyl mercaptan to the double bonds of unsaturated fatty acids and rosin acids during kraft pulping and isolation The interaction sulfate soap and sodium oleate, sodium salts of resin acids from gum rosin aqueous-alkaline solution of sodium sulphide and 1-oktadekantiola at 160-165 °С. The formation of organic sulfides and thiols due to hydrogen sulfide and oktadekantiola connection respectively to the double bonds of the fatty acids and resin does not occur. It has been found that the washing-treatment of the reaction mass saline alkaline solution (sodium chloride + sodium hydroxide) containing copper metal after reaction with sodium sulfide or 1 oktadekantiolom prevents residual connection thiol and hydrogen sulfide to the double bonds of fatty and rosin acids by treatment 30% aqueous sulfuric acid. Maximum total sulfur content measured by two methods (energy dispersive x-ray fluorescence spectroscopy and UV-oxidation products of the high temperature), in this case in the final products of interaction of sodium oleate and sodium salts of rosin acids, sulfur compounds was 55 ppm. Known patterns may be used in the preparation of sulfate soap and tall oil and its fractions (fatty acids, rosin, pitch) with a low total sulfur content, which will expand the field of their application.
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