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:
Nov. 21, 2000
Filed:
Aug. 14, 1998
Applicant:
Inventors:
Hans Joachim Hasselbach, Gelnhausen, DE;
Klaus Huthmacher, Gelnhausen, DE;
Katja Kelm, Kahl, DE;
Horst Weigel, Rodenbach, DE;
Assignee:
Degussa-Huls AG, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568422 ; 568421 ;
Abstract
Aliphatic alkanals with a water content of greater than 300 ppm which are stable in storage, and a method of improving the storage stability of these aliphatic alkanals, especially of substituted, sulfur-containing alkanals. The formation of oligomers, polymers and condensation products from elimination reactions and oxidation and the subsequent reactions of the products formed results in undesired impurities that are largely prevented by the addition of an organic acid that forms metal complexes and, optionally, alkanolamines or trialkanolamines.