Solvent recovery during production of aromatic polycarboxylic ac

Details Solvent recovery during production of aromatic polycarboxylic ac Solvent recovery during production of aromatic polycarboxylic ac

1990-11-29

1992-03-10

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562416, C07C 51265

Patent

active

050951424

ABSTRACT:
A process for oxidizing a dialkyl substituted benzene, such as meta-xylene, to an aromatic polycarboxylic acid, such as isophthalic acid, in the presence of a solvent, such as acetic acid, in an oxidation zone followed by an oxidation-crystallization zone, wherein a secondary dehydration tower is used to separate water from the solvent in the overhead stream from the oxidation-crystallization zone and provide a solvent-rich fluid for recycle to the oxidation zone, resulting in expanded capacity of the process coupled with a minimization of captial cost.

REFERENCES:
patent: 3089906 (1963-05-01), Saffer et al.
patent: 3089907 (1963-05-01), Saffer et al.
patent: 4053506 (1977-10-01), Park et al.
patent: 4855492 (1989-08-01), Hundley
patent: 4877900 (1989-10-01), Tamaru et al.
patent: 5004830 (1991-04-01), Park et al.

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