PRODUCTION OF HIGH-PURITY P,P'-BIPHENOL

• Main Authors: SHIBATA KATSUMASA, KAWAHARA MIKIO
• Format: Patent
• Language: English
• Published: 05.02.1985
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

PURPOSE:To obtain the titled compound useful as a starting raw material of plastics, easily, in high purity, with only a simple post-treatment, by debutylating tetrabutylbiphenol in a solvent comprising diphenyl ether having high boiling point. CONSTITUTION:Tetrabutylbiphenol (3,3',5,5'-tetra-t-butyl-4,4'-dioxybiphenyl) is debutylated in diphenyl ether solvent optionally in the presence of butylated diphenyl ether produced by the debutylation reaction. The objective compound useful especially as a raw material of heat-resistant resins can be produced in the form of highly pure glossy white crystal, only by filtering, washing with toluene, and drying the p,p'-biphenol crystallized in the above process. EFFECT:Since the solvent easily dissolves the debutylation catalyst, the catalyst can be separated without using particular treatment, and the filtrate can be used repeatedly as the solvent for the next reaction.