Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1978-02-27
1980-05-13
Konopka, P. E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252415, 423 49, 423 52, 423139, 562414, 562593, B01J 2732, B01J 2728, C07C 5142, C01G 4500, C01G 5100
Patent
active
042027977
ABSTRACT:
Heavy metal values are recovered from mother liquors remaining from oxidations to mono- or poly- carboxylic acids in aliphatic monocarboxylic acids in presence of catalyst heavy metals and bromides by (1) concentrating, (2) precipitating and (3) separating heavy metals as sulphates and (4) recovering aliphatic monocarboxylic acid and H Br by distillation, (5) dissolving sulphates in water, (6) adsorbing heavy metals on a cation exchange resin and (7) desorbing them, preferably with the solution from Step 4.
REFERENCES:
patent: 2964559 (1960-12-01), Burney et al.
patent: 3033899 (1962-05-01), Knobloch et al.
patent: 3780096 (1973-12-01), Johnson et al.
patent: 4008306 (1977-02-01), Yamashita et al.
Imperial Chemical Industries Limited
Konopka P. E.
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