Palladium-rhodium catalyst for purification of crude terephthali

Details Palladium-rhodium catalyst for purification of crude terephthali Palladium-rhodium catalyst for purification of crude terephthali

1981-10-29

1983-07-19

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

562487, B01J 2346, B01J 2344, C07C 5142

Patent

active

043942997

ABSTRACT:
A process for producing a purified terephthalic acid which comprises reacting in a liquid phase a mixture of hydrogen and crude terephthalic acid, a palladium/rhodium catalyst on a porous carbonaceous support wherein the catalyst compound is prepared by adsorbing palladium on the support from a complex salt formed in the presence of an amine and acetic acid, followed by deposition of rhodium from a solution of sodium hexanitritorhodate.

REFERENCES:
patent: 3318891 (1967-05-01), Hausman et al.
patent: 4052336 (1977-10-01), Montfoort et al.
patent: 4113658 (1978-09-01), Geus
patent: 4239653 (1980-12-01), Rodnar et al.
patent: 4260817 (1981-04-01), Thompson et al.
patent: 4260829 (1981-04-01), Horner et al.

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