Process for the preparation of secondary alcohol sulfate-containing surfactant compositions
AssigneeShell Oil Company
InventorEugene F. Lutz
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Abstract
This invention relates to a process for preparing secondary alkyl sulfate-containing surface active compositions substantially free of unreacted organic matter and water, which process comprises: a) sulfating a detergent range olefin having from about 8 to about 22 carbon atoms with concentrated sulfuric acid, b) neutralizing the product of step a) with a base dispersed in a nonionic surfactant having a boiling point higher than that of said detergent range olefin and its corresponding secondary alcohol, c) saponifying the product of step b), d) passing the product of step c) through a thin film evaporator to evaporate unreacted organic matter from said product and recovering said product.
Claims33
A process for preparing secondary alkyl sulfate-containing surface active compositions substantially free of unreacted organic matter and water, which process comprises:
- (a) sulfating a detergent range olefin having from about 8 to about 22 carbon atoms with concentrated sulfuric acid. (b) neutralizing the product of step (a) with a base dispersed in a nonionic surfactant having a boiling point higher than that of said detergent range olefin and its corresponding secondary alcohol, (c) saponifying the product of step (b), (d) passing the product of step (c) through a thin film evaporator to evaporate unreacted organic matter from said product and recovering said product.
A process for preparing secondary alcohol sulfate-containing surface active compositions substantially free of unreacted organic matter and water, which process comprises:
- (a) sulfating a detergent range olefin having from about 8 to about 22 carbon atoms with concentrated sulfuric acid, (b) neutralizing the product of step (a) with a base dispersed in an alcohol ethoxylate having a formula R.sub.1 --O--(CH.sub.2 CH.sub.2 O).sub.n --H, wherein R.sub.1 is an alkyl group having from about 8 to about 18 carbon atoms or an arylalkyl group having an alkyl moiety having from about 8 to about 12 carbon atoms, and n represents the average number of oxyethylene groups per molecule and is a number in the range of from about to about 12, said alcohol ethoxylate having a boiling point higher than that of said detergent range olefin and its corresponding secondary alcohol, (c) saponifying the product of step (b). (d) passing the product of step (c) through a thin film evaporator to evaporate unreacted organic matter and recovering said product.
Dependencies are inferred from the claim text.