Patent ID: 7304178

Claim:
An isolated isophthalic acid composition comprising: (1) isophthalic acid in an amount greater than 50 percent by weight; (2) (a) 3-carboxybenzaldehyde in an amount ranging from 1 ppm to 1000 ppm; or (b) m-toluic acid in an amount ranging from 1 ppm to 1000 ppm; or both (2) (a) and (2) (b); and (3) at least two of the following: (a) terephthalic acid in an amount ranging from 50 ppm to 49 wt %; (b) benzene-tricarboxylic acid isomers in an amount ranging from 140 ppm to 1000 ppm; (c) 3,3′-dicarboxybiphenyl is in an amount ranging from 25 ppm to 49 wt %; (d) phthalic acid is in an amount ranging from 20 ppm to 49 wt %; (e) 3-hydroxybenzoic acid is in an amount ranging from 3 ppm to 1000 ppm; (f) 3-hydroxymethylbenzoic acid is in an amount ranging from 40 ppm to 49 wt %; and (g) benzoic acid in an amount ranging from 60 ppm to 1000 ppm.