Work-up of residues in the preparation of carboxylic acids

Details Work-up of residues in the preparation of carboxylic acids Work-up of residues in the preparation of carboxylic acids

2006-08-01

2006-08-01

Oh, Taylor Victor (Department: 1625)

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

Organic compounds

Carboxylic acids and salts thereof

C562S530000, C562S528000, C562S540000, C562S593000

Reexamination Certificate

active

07084300

ABSTRACT:
Degradation acids obtained in the synthesis of carboxylic acids, in particular dicarboxylic acids, having from 8 to 16 carbon atoms may be isolated by separating the degradation acids in the form of a solid from the crude reaction mixture, then washing the degradation acids in the form of an oil with water at an elevated temperature. The resulting degradation acids having low oxidant and metal contents, and the metal catalyst may be recirculated back to the process.

REFERENCES:
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patent: 3112340 (1963-11-01), Fuchs
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patent: 3758564 (1973-09-01), Davis
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T. P. Hilditch, Catalytic Processes in Applied Chemistry, 1929, D. Van Nostrand Co., xiii-xx.

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