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. 28, 1989
Filed:
Nov. 16, 1987
Applicant:
Inventor:
Rudolf Pistorius, Hunstetten, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
A process for isolating alkanesulfonates having a low alkali metal sulfate content and sulfuric acid from paraffin-sulfoxidation reaction mixtures with the aid of alcohols, the reaction mixture, freed from sulfur dioxide, being mixed in a sequence of five mixer/settler vessels with a C.sub.4 -C.sub.8 -alcohol and the amount of alkali metal hydroxide which is necessary for neutralization. The process is designed so that no alkali metal sulfate, but instead only sulfuric acid, is produced as a byproduct. Fewer alkali metal ions are thereby lost from the system, and the consumption of alkali metal hydroxide for neutralization is accordingly reduced.