Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Patent
1992-10-16
1994-10-18
Richter, Johann
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
502177, 502178, 502180, 502261, 502262, 502327, 502355, B01J 2118, B01J 2106, B01J 2340, B01J 2341
Patent
active
053568508
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.
It is particularly useful for regenerating palladium catalysts 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.
Greenwood et al., Chemistry of the Elements, 1986, p. 1242.
Correia Yves
Jourdain Dominique
Nowocien Joseph
Salerno Alexandre
Hydorn Michael B.
Richter Johann
Societe Elf Atochem S.A.
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