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. 05, 1991
Filed:
Jun. 18, 1987
Robert Piorr, Ratingen-Hoesel, DE;
Guenter Panthel, Haan, DE;
Karl H Schmid, Mettmann, DE;
Dietmar Colignon, Erkrath, DE;
Hans J Rommerskirchen, Duesseldorf-Eller, DE;
Wolfgang Schmidt, Monheim, DE;
Horst Ritterbex, Dusseldorf, DE;
Henkel Kommanditgesellschaft auf Aktien, Duesseldorf-Holthausen, DE;
Abstract
In light colored surfactants produced by sulfonation of fatty acid alkyl esters with less than 2 moles of SO.sub.3 per mole of fatty acid alkyl ester and subsequent work-up of the crude sulfonate in aqueous medium to form salts, the content of .alpha.-sulfofatty acid disalts is regulated and reduced by transesterifying the sulfonation product before its treatment with an aqueous medium with at least about 0.5 mole equivalent of an alcohol, based on the SO.sub.3 which is not for .alpha.-sulfonation.