Process for the preparation of hydrooxydiphenyls

Details Process for the preparation of hydrooxydiphenyls Process for the preparation of hydrooxydiphenyls

1992-09-24

1993-09-28

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 3912, C07C 3700

Patent

active

052488403

ABSTRACT:
To prepare hydroxydiphenyls, a compound or a mixture of several compounds consisting of completely or partly hydrogenated hydroxydiphenyl is dehydrogenated catalytically in the gas phase, a catalyst being employed which comprises, as the active constituents, a combination of rhodium and one or more other platinum metal(s) from the group comprising platinum, palladium, ruthenium and iridium, and which comprises, as promoters, one or more alkali metal hydroxides and/or alkali metal sulphates, the support of which comprises chromium and manganese.

REFERENCES:
patent: 4060559 (1977-11-01), Goto et al.
patent: 4080340 (1978-03-01), Imamura
patent: 4729977 (1988-03-01), Immel et al.
patent: 4902661 (1990-02-01), Immel et al.

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