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:
Mar. 12, 2019
Filed:
Sep. 04, 2015
Applicant:
Evonik Roehm Gmbh, Darmstadt, DE;
Inventors:
Steffen Krill, Muehltal, DE;
Belaid Ait Aissa, Darmstadt, DE;
Alexander May, Seeheim-Jugenheim, DE;
Marcel Treskow, Darmstadt, DE;
Assignee:
Evonik Roehm GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 67/20 (2006.01); B01J 20/20 (2006.01); C01C 1/02 (2006.01); C01C 3/02 (2006.01);
U.S. Cl.
CPC ...
C07C 67/20 (2013.01); B01J 20/20 (2013.01); C01C 1/024 (2013.01); C01C 3/0212 (2013.01); C01C 3/0208 (2013.01);
Abstract
The present invention relates to a process for preparing alpha-hydroxycarboxylic esters proceeding from hydrogen cyanide, wherein the ammonia formed in the step of alcoholysis of the corresponding alpha-hydroxycarboxamide is recycled into a hydrogen cyanide preparation process after a purification step.