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. 06, 2001
Filed:
Sep. 16, 1999
Akzo Nobel NV, Arnhem, NL;
Abstract
A process is provided for preparing a fatty acyl isethionate salt of the formula R,C(O)OR,SO,M which comprises reacting at least one fatty acid of the formula R,C(O)OH with at least one hydroxyalkanesulfonic acid salt of the formula HOR,SO,M in the presence of a catalyst, and distilling off water, wherein R,is a linear or branched, saturated or unsaturated hydrocarbon having 5 to 31 carbon atoms, R,is a linear, saturated or unsaturated hydrocarbon having 2 to 4 carbon atoms, and M is lithium, sodium, potassium, or ammonium and is characterised in that a foam control agent comprising a silicone oil is added. The foam control agent is added preferably once the reaction mixture is homogeneous. The process is suitably carried out with substantially equimolar amounts of fatty acid and hydroxyalkanesulfonic acid salt, preferably without distilling off any fatty acid.