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. 05, 1991
Filed:
Nov. 21, 1989
Applicant:
Inventors:
Manfred Kaufhold, Marl, DE;
Werner Otte, Dorsten, DE;
Assignee:
Huels AG, Marl, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568386 ; 549453 ; 549454 ;
Abstract
A process for the preparation of 5-chloro-2-pentanone starting from a ketal of a levulinic ester, followed by hydrogenation, and then reaction with hydrochloric acid. The process involves first purifying the ketal of the levulinic ester by distillation, making the hydrogenation catalysts for the ketal alkaline, and reacting the 3-(2-methyl-1,3-dioxolan-2-yl)propan-1-ol formed in this hydrogenation with hydrochloric acid to obtain 5-chloro-2-pentanone.