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:
Oct. 08, 1996
Filed:
Mar. 15, 1995
Applicant:
Inventors:
Michael Meier, Frankfurt am Main, DE;
Heinz-Georg Kautz, Birstein, DE;
Andreas Schrell, Frankfurt am Main, DE;
Assignee:
Hoechst AG., , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544398 ; 544401 ;
Abstract
Preparation of N-(2-sulfatoethyl)piperazine sulfate by reacting N-(2-hydroxyethyl)piperazine in a mixture of high- or relatively high-percentage sulfuric acid and oleum or chlorosulfonic acid at temperatures of about 80.degree. C. to about 250.degree. C., introducing the sulfation mixture formed into a water-miscible aliphatic alcohol and isolating the N-(2-sulfatoethyl)piperazine sulfate formed.