Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1994-06-24
1995-12-12
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
502185, C07C 5316
Patent
active
054751357
ABSTRACT:
The invention relates to a catalyst comprising a rare metal of Group VIII of the Periodic Table of Elements which has been deposited on an inert support and which has been used to dehalogenate .alpha.-halogenated carboxylic acids in the presence of hydrogen, and a rare metal of Group VIII of the Periodic Table of Elements which has been deposited on an inert support and which is such that the granulometry of b) is very much lower than that of a) to form a homogeneous mixture as a result of the action of currents of .alpha.-halogenated carboxylic acid and hydrogen wherein said invention is particularly useful for regenerating palladium catalyst used in the purification of crude monochloroacetic acid.
REFERENCES:
patent: 3803054 (1974-04-01), Habig et al.
patent: 3864281 (1975-02-01), Ohorodnik et al.
patent: 4956326 (1990-09-01), Yoneda et al.
patent: 5191118 (1993-03-01), Correia et al.
European Search Report, Appln. No. EP 92 20 3075, 13 Jan. 1993.
Greenwood et al., Chemistry of the Elements, 1986, p. 1242.
Correia Yves
Jourdain Dominique
Nowocien Joseph
Salerno Alexandre
Conrad, III Joseph M.
Dees Jos,e G.
Societe Elf Atochem S.A.
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