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. 31, 2005
Filed:
Apr. 27, 2001
Volker Schaefer, Altrip, DE;
Wolfgang Knoll, Weisenheim, DE;
Alexander Schmitt, Roedersheim-Gronau, DE;
Christoph Huettner, Weinheim-Luetzelsachsen, DE;
Volker Schaefer, Altrip, DE;
Wolfgang Knoll, Weisenheim, DE;
Alexander Schmitt, Roedersheim-Gronau, DE;
Christoph Huettner, Weinheim-Luetzelsachsen, DE;
RASCHIG GmbH, Ludwigshafen, DE;
Abstract
The invention relates to a method for the production of ω-aminoalkylsulphonic acids of general formula (I), where R1 and R2=optionally substituted alkyl groups with 1 20 C atoms and n=a whole number from 2 6, whereby an amine of formula (II), where R1 and R2 have the above meanings is reacted with an alkyl dihalide of formula (III), where n has the above meaning and Xand X=chlorine or bromine, with addition of alkali hydroxide at a pH of 8 10. The pH is then adjusted to a value of 0 1, by addition of a hydrohalic acid and excess alkyl dihalide is separated off, before the reaction solution is adjusted to a pH of 6 7.5 with alkali liquor, alkali sulphite is added and the product (I) formed at elevated temperate.