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:
Dec. 13, 2016
Filed:
May. 22, 2015
Applicant:
Evonik Degussa Gmbh, Essen, DE;
Inventors:
Katrin Marie Dyballa, Recklinghausen, DE;
Robert Franke, Marl, DE;
Dirk Fridag, Haltern am See, DE;
Siegfried R. Waldvogel, Gau-Algesheim, DE;
Thomas Quell, Mainz, DE;
Michael Mirion, Mainz, DE;
Assignee:
Evonik Degussa GmbH, Essen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C07C 37/11 (2006.01);
U.S. Cl.
CPC ...
C07C 37/11 (2013.01); C07C 37/11 (2013.01); C07C 39/15 (2013.01);
Abstract
A process for preparing a 2,2'-biphenol, proceeds by a) adding a first phenol to a reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding an acid having a pKa in the range from 0.0 to 5.0 to the reaction mixture, and e) heating the reaction mixture such that the first phenol and the second phenol are converted to said 2,2′-biphenol.