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US 4,052,443 AGranted
Process for preparing aqueous slurries of tabular habit diperisophthalic acid
AssigneePPG Industries, Inc.
InventorRobert G. Briody
Life of this patent
Estimating the term…
Abstract
Aqueous slurries of acicular habit diperisophthalic acid are converted to slurries of tabular habit by heating at temperatures above 67.degree. C.
Claims1
A method of preparing an aqueous slurry of metastable tabular habit diperisophthalic acid said slurry consisting essentially of diperisophthalic acid and water which comprises maintaining an aqueous slurry containing acicular habit diperisophthalic acid and having a water content of over 30 weight percent at a temperature from above 67.degree. C. to about 90.degree. C. whereby to convert acicular diperisophthalic acid to tabular habit diperisophthalic acid.
Dependencies are inferred from the claim text.