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US 2003/0120109 A1Published application
Purification of a crude acid mixture
OwnerBruce I. Roseninventor
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Abstract
The invention generally relates to a method for purifying a mixture of crude aromatic acids comprising at least one benzene carboxylic acid and at least one naphthalene carboxylic acid. The purification method of the present invention provides a purified aromatic acid mixture useful in the manufacture of ultraviolet light resistance polyesters.
Claims20
A method of purifying a crude aromatic acid mixture comprising hydrogenating the mixture in the presence of hydrogen and a hydrogenation catalyst to produce a purified aromatic acid mixture.
Dependencies are inferred from the claim text.