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:
Jul. 07, 1998
Filed:
Mar. 27, 1996
Dirk Buhring, Brasil, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
Process for the preparation of acyloxyalkanesulfonates having improved properties The acyloxyalkanesulfonates are obtained in accordance with the invention by direct esterification in which at least one fatty acid is esterified with at least one ammonium hydroxyalkanesulfonate of the formula HO-A-SO.sub.3.sup.- + NR.sup.1 R.sup.2 R.sup.3 R.sup.4 in which A is a C.sub.2 -C.sub.4 -alkylene and R.sup.1.sub.1 R.sup.2.sub.1 R.sup.3 and R.sup.4 are hydrogen or a C.sub.1 -C.sub.4 -alkylene group in the presence of an esterification catalyst at a temperature of not more than 200.degree. C., with removal of the water present. This process gives a product of high acyloxyalkane-ammonium sulfonate content without the need for a consistency regulator to be added.