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. 11, 1976
Filed:
Sep. 13, 1972
Applicant:
Inventors:
Bengt G Bjellqvist, Vasterhaninge, SW;
Torbjorn E Westermark, Taby, SW;
Anders R Axelsson, Stockholm, SW;
Martin J Nilsson, Molndal, SW;
Assignee:
Aminkemi AB, Bromma, SW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260503 ; 2605 / ;
Abstract
A process for the preparation of saturated, nonbranched aliphatic or alicyclic sulphonic acids by reacting the corresponding hydrocarbons with sulphur dioxide and elementary oxygen is disclosed, in which process the reaction is carried out in the presence of copper as a catalyst. Reaction rates, considerably higher than those previously reported in literature, are obtained and the formation of by-products resulting in discolouration of the sulphonic acid is counteracted.