Membrane separation of catalyst metals from aromatic acid produc

Details Membrane separation of catalyst metals from aromatic acid produc Membrane separation of catalyst metals from aromatic acid produc

1980-10-01

1982-01-26

Howard, Jacqueline V.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252411R, 75101BE, 423 215, 423 50, 423140, B01D 1300

Patent

active

043127789

ABSTRACT:
Precipitation-free recovery of catalyst metal content of residue from manufacture of benzene carboxylic acid by oxidation with source of molecular oxygen of liquid methyl-substituted benzene in presence of cobalt, manganese, cerium, and mixtures of two or more thereof followed by removal of benzene carboxylic acid and, if used, reaction solvent. Such precipitation-free method comprises extracting such residue with water, contacting the resulting extract solution or suspension of insolubles in extract solution with one side of a cation permeable fluoropolymer membrane and contacting the opposite side of the membrane with a hydrohalidic acid.

REFERENCES:
patent: 3454490 (1969-07-01), Wallace
patent: 3718583 (1973-02-01), Wu et al.
patent: 3957504 (1976-05-01), Win-Sow et al.
patent: 4051230 (1977-09-01), Miyauchi

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