Process for the production of high purity aromatic...

Details Process for the production of high purity aromatic... Process for the production of high purity aromatic...

2007-02-08

2008-12-16

Sullivan, Daniel M (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S417000, C562S412000, C562S413000

Reexamination Certificate

active

07465824

ABSTRACT:
A process is disclosed for producing at least one high purity aromatic carboxylic acid by oxidizing an aromatic feedstock with oxygen in a reaction medium comprising the aromatic feedstock, a promoter, a heavy metal catalyst, and a solvent which comprises benzoic acid and water to produce a reactor effluent wherein substantially all of the aromatic carboxylic acid produced remains in solution; and then hydrogenating the reactor effluent in the presence of a catalyst and hydrogen. This process efficiently and effectively produces high purity aromatic carboxylic acids by utilizing a common solvent for both oxidation and purification and eliminating the need for intermediate process steps and equipment.

REFERENCES:
patent: 4675438 (1987-06-01), Schwartz et al.
patent: 5612007 (1997-03-01), Abrams
patent: 6562997 (2003-05-01), Sikkenga et al.

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