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

Process for purification of p-hydroxymethylbenzoic acid

US Patent 4447645 · Granted May 8, 1984

Estimated economic value: $22,534,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Addition of mineral acids or salts thereof to a TMA production process2004
Catalytic oxidation and oxidative dehydrogenation using metal-compound-loaded, d1994
Liquid-phase xylene isomerization1990
Process for purification of crude p-hydroxymethylbenzoic acid1989
Catalyst and process for purification of crude terephthalic acid1988
Process for purification of crude p-hydroxymethylbenzoic acid1988
Tetramethylbiphenylcarboxylic acids and derivatives thereof1986
Antiemetic N-(1-substituted-4,5-dihydro-1H-pyrazol-4-yl)benzamides1985
Process for removal and recycle of p-toluic acid from terephthalic acid crystall1985
Process for preparing palladium on carbon catalysts for purification of crude te1984
Process for electrochemical reduction of terephthalic acid1984
Preparation of poly(p-methylenebenzoate) copolyesters1984