Preparation of isopropylidene bis(phthalic acid)

Details Preparation of isopropylidene bis(phthalic acid) Preparation of isopropylidene bis(phthalic acid)

1990-02-22

1991-07-02

Dees, Jose G.

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

Organic compounds

Carboxylic acids and salts thereof

502169, 502170, 562412, 562417, C07C 51265

Patent

active

050287370

ABSTRACT:
An oxidation process is provided for converting dixylylpropane to isopropylidene bis(phthalic acid) in good yields with minimal by-product production, especially trimellitic acid production. The oxidation process employs an oxidation catalyst that includes zirconium as well as cobalt, manganese, and bromine.

REFERENCES:
patent: 3920735 (1975-11-01), Wampfler et al.
patent: 4314073 (1982-02-01), Crooks
patent: 4786621 (1988-11-01), Holzhauer et al.
patent: 4786753 (1988-11-01), Partenheimer et al.

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