Process for oxidation of alkyl aromatic compounds

Details Process for oxidation of alkyl aromatic compounds Process for oxidation of alkyl aromatic compounds

1989-11-29

1991-04-02

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

502171, 502173, 502324, 562416, 562417, 562480, C07C 51215

Patent

active

050048309

ABSTRACT:
A process is disclosed for liquid phase oxidation of alkyl aromatic hydrocarbons to aromatic carboxylic acids in presence of a multivalent catalyst promoted by a source of bromine. The oxidation is conducted in at least two oxidation reactions. Exothermic heat of reaction is controlled by means of a liquid phase heat exchanger to control temperature and pressure. Oxygen partial pressure in each stage is at least 1.5 psia to minimize oxygen starvation and improve selectivity. Low reactor temperature, high reactor pressure and improved selectivity improve product yield and product quality.

REFERENCES:
patent: 3092658 (1963-06-01), Baldwin et al.
patent: 4398040 (1983-08-01), Suzuki et al.
patent: 4755622 (1988-07-01), Schammel et al.
patent: 4764639 (1988-08-01), Schammel
patent: 4769487 (1988-09-01), Hundley et al.
patent: 4816601 (1989-03-01), Lowry et al.

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