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:
May. 03, 1977
Filed:
Oct. 07, 1975
Toshiaki Ogoshi, Funabashi, JA;
Shizuo Sekiguchi, Yokohama, JA;
Lion Fat & Oil Co., Ltd., Tokyo, JA;
Abstract
A method for manufacturing .alpha.-sulfo fatty acid ester salt which comprises the steps of sulfonating a mixture of 100 parts by weight of saturated fatty acid alkyl ester having 9 to 26 carbon atoms and less than 10 parts by weight of inorganic sulfate by sulfonating gas containing 1.0 to 2.0 mols of SO.sub.3 per mol of said fatty acid ester and diluted to a concentration of 3 to 20% by volume by inert gas at a higher reaction temperature than the solidification point of said fatty acid ester, followed by neutralization by caustic alkali. According to this method, an amount of by-product yielded by breakage of an ester linkage is decreased with the resultant lowered coloration of the product. .alpha.-sulfo fatty acid ester salt is used preferably as an active component for a detergent composition.