Purification of dicarboxylic aromatic acids

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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C07C 5142

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active

043179231

ABSTRACT:
Dicarboxylic aromatic acids containing impurities such as aldehydes may be purified by treating the acids at an elevated temperature in the presence of a catalyst containing metallic rhenium whereby the impurities may be removed and the purified acids recovered.

REFERENCES:
patent: 3151154 (1964-09-01), Sargent et al.
patent: 3456001 (1969-07-01), Olsen
patent: 3522298 (1970-07-01), Bryant, Jr. et al.
patent: 3546285 (1970-12-01), Witt
patent: 3607921 (1971-09-01), Stancell et al.
Cotton "Advanced Inorg. Chem.", 2nd Ed., (1966) p. 965.

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