Process for the preparation of light-colored oleic acid sulfonates
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsAnsgar Behler, Hermann Anzinger, Michael Vogt
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Abstract
A process for the preparation of light-colored oleic acid sulfonates by continuous sulfonation of an industrial oleic acid having an oleic acid content of 65 to 85% by weight and a linoleic acid content of up to 13% by weight with gaseous sulfur trioxide in a molar ratio of industrial oleic acid to sulfur trioxide of 1 : 0.8 to 1 : 1.0, neutralization and hydrolysis of the acid sulfonation product with aqueous bases and bleaching of the neutralized and hydrolyzed sulfonation product give oleic acid sulfonates having Klett color numbers of not more than 100.
Claims19
A process for the preparation of oleic acid sulfonate having a Klett color number of not more than 100 from oleic acid containing relatively large quantities of linoleic acid comprising the steps of
- A. continuously sulfonating crude oleic acid having an oleic acid content in the range of from about 65 to about 85% by weight, a linoleic acid content of from about 4 to about 13% by weight, and wherein the remainder of the crude oleic acid is comprised predominantly of other saturated and/or unsaturated fatty acids having from 10 to 22 carbon atoms, and wherein the crude oleic acid is distilled industrial oleic acid which has not been stored in air following distillation for more than one month, with gaseous sulfur trioxide in a molar ratio of olefinic double bonds present in the crude oleic acid to sulfur trioxide of about 1:0.8 to 1.0 to form an acid sulfonation product;
- B. neutralizing and hydrolyzing the acid sulfonation product from step A with at least one aqueous base;
- and
- C. bleaching the resulting aqeuous solution of oleic acid sulfonate with a bleaching agent to produce oleic acid sulfonate having a Klett color number of not more than 100.
A process for the preparation of oleic acid sulfonate having Klett color number of not more than 100 from oleic acid containing relatively large quantities of linoleic acid comprising the steps of:
- A. continuously sulfonating crude oleic acid having an oleic acid content in the range of from about 65 to about 85% by weight, a linoleic acid content of from about 4 to about 13% by weight, and wherein the remainder of the crude oleic acid is comprised predominantly of other saturated and/or unsaturated fatty acids having from 10 to 22 carbon atoms, and wherein the crude oleic acid is distilled industrial oleic acid which has not been stored in air following distillation for more than one month, with gaseous sulfur trioxide in a molar ratio of olefinic double bonds present in the crude oleic acid to sulfur trioxide to about 1:0.8 to 1.0 to form an acid sulfonation production;
- B. simultaneously neutralizing, hydrolyzing, and bleaching the acid sulfonation product from step A with at least one aqueous base and a bleaching agent to produce oleic acid sulfonate having a Klett color number of not more than 100.
Dependencies are inferred from the claim text.