The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1981
Filed:
Sep. 26, 1979
Shizuo Sekiguchi, Funabashi, JP;
Katsumasa Nagano, Ichikawa, JP;
Yozo Miyawaki, Funabashi, JP;
Kyozo Kitano, Chiba, JP;
The Lion Fat & Oil Co., Ltd., Tokyo, JP;
Abstract
Process for the production of light-colored internal olefin sulfonates substantially free from unreacted olefins comprises sulfonating an internal olefin with gaseous SO.sub.3 to produce a sulfonation reaction mixture, neutralizing said sulfonation reaction mixture with caustic alkali without hydrolysis of sulton contained in the mixture, adding to the neutralized sulfonation reaction mixture an extracting reagent selected from halogenated hydrocarbons to form an extract phase containing unreacted olefin and a raffinate phase containing internal olefin sulfonates and sultons, and hydrolyzing the resulting raffinate phase in the presence of caustic alkali.