Process for increasing the yield of purified isophthalic acid an

Details Process for increasing the yield of purified isophthalic acid an Process for increasing the yield of purified isophthalic acid an

1990-11-06

1992-05-05

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

562486, 502185, C07C 51487, C07C 5143

Patent

active

051109840

ABSTRACT:
The invention is an improved method of purification of isophthalic acid comprising recycling a portion of the mother liquor solution into the feed solution of an isophthalic acid purification process. The improved method comprises the following steps:

REFERENCES:
patent: 4391985 (1983-07-01), Hook et al.
patent: 4405809 (1983-09-01), Stech et al.
patent: 4933492 (1990-06-01), Schroeder et al.

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