Treatment of organic sulfonic acid
AssigneeThe Lubrizol Corporation
InventorsEric R. Schnur, David L. Westfall
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Abstract
The present invention describes treating an organic sulfonic acid with an olefin to obtain an improvement in color of the resultant salts and to lessen the amount of inactive components in the composition.
Claims35
In the process of treating an organic sulfonic acid the steps comprising;
- contacting the organic sulfonic acid with at least 0.3 weight part of an unsaturated hydrocarbon per 100 weight parts of the organic sulfonic acid to obtain a mixture, wherein the unsaturated hydrocarbon has a number average molecular weight between about 600 and 3,000 wherein the organic sulfonic acid is neutralized and contacted with a filter aid.
The process of treating a mixture of an alkyl substituted aromatic sulfonic acid and a source of sulfur dioxide wherein an alkyl substituted aromatic compound is contacted with a sulfonating agent to obtain the alkyl substituted aromatic sulfonic acid, and the alkyl substituted aromatic sulfonic acid and source of sulfur dioxide is then processed to reduce the sulfur dioxide content of the mixture by introducing a relatively non-reactive gas to the mixture and maintaining the mixture at a temperature of about 70.degree. F. (23.degree. C.) to about 175.degree. F. (80.degree. C.) for a period of time sufficient to reduce the sulfur dioxide content, and contacting the alkyl substituted aromatic sulfonic acid with an unsaturated hydrocarbon having a number average molecular weight between about 600 and 3,000 wherein the alkyl substituted aromatic sulfonic acid is neutralized and contacted with a filter aid.
Dependencies are inferred from the claim text.