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. 22, 2019
Filed:
Jan. 10, 2014
Thomas Haas, Muenster, DE;
Philip Engel, Essen, DE;
Jan Christoph Pfeffer, Hanau, DE;
Oliver Thum, Ratingen, DE;
Christian Gehring, Marl, DE;
Thomas Haas, Muenster, DE;
Philip Engel, Essen, DE;
Jan Christoph Pfeffer, Hanau, DE;
Oliver Thum, Ratingen, DE;
Christian Gehring, Marl, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The invention relates to a process for preparing an α,ω-alkanediol comprising the steps of a) reacting an alkanoic acid with an alkanol to give an ester, b) oxidizing at least one terminal carbon atom of the ester by contacting with a whole-cell catalyst, which expresses an alkane hydroxylase, in aqueous solution and in the presence of molecular oxygen, to give an oxidized ester, c) hydrogenating the oxidized ester to form the alkanediol and alkanol, and d) removing the alkanol by distillation, forming a reaction mixture depleted with respect to the alkanol, and recycling the alkanol in step b).