Patent · US Active

Process for preparing 2,2′-biphenols using selenium dioxide

US9517986B2 · kind B2 · utility

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14Claims

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Assignee

EVONIK DEGUSSA GMBH · 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 · Recklinghausen, DE
Michael Mirion · Mainz, DE

Key dates

Filing date	May 22, 2015
Grant date	Dec 13, 2016
Priority date	—
Expiry date	May 22, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C37/11
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.