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:
Sep. 17, 2002
Filed:
Mar. 18, 1998
Applicant:
Inventor:
Manfred Kaufhold, Marl, DE;
Assignee:
Degussa-Huels Aktiengesellschaft, Frankfurt, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
C07D / ; C07D / ;
Abstract
The invention relates to a process for the preparation of 1,2,3,6-tetrahydro 2,2,6,6-tetramethylpyridine N-oxide by the catalytic oxidation of 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyridine, wherein 1,2,3,6-tetrahydro-2,2,6,6-tetramethylpyridine is oxidized with hydrogen peroxide in an aqueous medium in the presence of an alkaline earth metal salt or hydroxide as catalyst. The product is a polymerization inhibitor for monomers.