Method for the preparation of a phenol

Details Method for the preparation of a phenol Method for the preparation of a phenol

1991-12-31

1993-05-11

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568800, 568802, C07C 3756

Patent

active

052103315

ABSTRACT:
The invention relates to a process for the preparation of a phenol by oxidative decarboxylation of a corresponding arylcarboxylic acid in the presence of a Cu-containing catalyst, the phenol being obtained through a hydrolysis step. The characteristic part of the process is oxidation of a Cu(I)-containing catalyst and reduction and hydrolysis in the absence of oxygen. The process can be carried out under liquid phase or gas phase conditions in a one-step or multi-step process and nucleation agents can be added for crystallization during catalyst oxidation. In a preferred embodiment, at least 0.04 wt.% copper remains present as Cu(I) after oxidation.

REFERENCES:
patent: 2766294 (1956-10-01), Toland
patent: 2852567 (1958-09-01), Barnard
patent: 3803247 (1974-04-01), Glew
patent: 3929911 (1975-12-01), van Dierendonck et al.
patent: 4154964 (1979-05-01), Balg
patent: 4405823 (1983-09-01), Maki

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