Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Patent
1991-03-25
1992-03-10
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
562485, C07C 5143
Patent
active
050951467
ABSTRACT:
Optical density of terephthalic acid is reduced in excess of ninety percent by the direct addition of water to selected crystallizers in a precipitative process based on hydrogenation and flask crystallization.
REFERENCES:
patent: 3944602 (1976-03-01), Katzschmann
patent: 4357475 (1982-11-01), Hanotier et al.
Wilger-Nowicki Diane
Zeitlin Martin A.
Amoco Corporation
Blumberg Gunar J.
Clarke Vera C.
Dees Jos,e G.
Magidson William H.
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