Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for purification of crude p-hydroxymethylbenzoic acid

Process for purification of crude p-hydroxymethylbenzoic acid

US Patent 4721808 · Granted Jan 26, 1988

Estimated economic value: $10,961,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Selective methylation catalyst, method of catalyst manufacture and methylation p2006
Addition of mineral acids or salts thereof to a TMA production process2004
Alkylation of alkylaromatics promoted by amine compound1994
Alkylation of alkylaromatics promoted by sonicated alkali metal1993
Polyamide having improved gas barrier properties from adipic acid, isophthalic a1992
Molded bottles and method of producing same1991
Catalyst and process for purification of crude terephthalic acid1988
Preparation of cyclohexane dicarboxylic acids1988
Purification and esterification of methacrylic acid1988
Process for preparing palladium on carbon catalysts for purification of crude te1984
Catalyzed hydrogenation of terephthalic acid to p-hydroxymethylbenzoic acid usin1984
Process for purification of p-hydroxymethylbenzoic acid1984