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US 9,517,986 B2Granted
Process for preparing 2,2′-biphenols using selenium dioxide
AssigneeEvonik Degussa GmbH
InventorsKatrin Marie Dyballa, Robert Franke, Dirk Fridag, Siegfried R. Waldvogel, Thomas Quell, Michael Mirion
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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.
Claims14
A process for preparing a 2,2′-biphenol, comprising:
- 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.
2 more elements
Dependencies are inferred from the claim text.