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. 23, 2006
Filed:
Aug. 27, 2003
Process for producing of an aminoalkylsulfonic acid and a method of salt exchange for a salt thereof
Takuhiro Kimura, Kawagoe, JP;
Tsutomu Tani, Kawagoe, JP;
Reiji Miyahara, Yokohama, JP;
Wako Pure Chemical Industries, Ltd., Osaka, JP;
Abstract
A process for producing an aminoalkylsulfonic acid of formula [2]: wherein Rand Rare each independently hydrogen, alkyl, aryl or aralkyl; and Rand Rare each independently hydrogen or alkyl, comprising reacting an aminoalkylsulfonate salt of formula [1]: wherein M is alkali metal, organic ammonium or ammonium ion; and Rto Rare as described above, an aqueous solution thereof, or a solution dissolving any one of them in a water-soluble organic solvent, selected from alcohols having 1 to 3 carbon, carboxylic acids having 2 to 12 carbon and dimethylformamide, with an organic acid; and a method of salt exchange for an aminoalkylsulfonate salt of formula [1']: wherein M′ is alkali metal, organic ammonium or ammonium ion; and Rand Rare as described above, comprising reacting the aminoalkylsulfonate salt formula [2] with a hydroxide of formula [6]:M′OH[6] wherein M′ is as described above, in alcohol or water.