REMOVAL OF BUTYL GROUP FROM TETRABUTYL BIPHENOL

PURPOSE:To remove butyl from 3,3',5,5'-tetra-t-butyl-4,4'-biphenol by debutylating the 3,3',5,5'-tetra-t-butyl-4,4'-biphenol in the presence in a solvent consisting of a phenol and subsequently adding phenol, etc., to a bottom solution to transalkylate the unreacted t-b...

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Hauptverfasser:	AYABE YOSHIHARU, SHIBATA KATSUMASA, KAWAHARA MIKIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL METHODS OF ORGANIC CHEMISTRY GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To remove butyl from 3,3',5,5'-tetra-t-butyl-4,4'-biphenol by debutylating the 3,3',5,5'-tetra-t-butyl-4,4'-biphenol in the presence in a solvent consisting of a phenol and subsequently adding phenol, etc., to a bottom solution to transalkylate the unreacted t-butyl groups to the phenol. CONSTITUTION:In the first process, 3,3',5,5'-tetra-t-butyl-4,4'-biphenol(TBBP) is debutylated in the presence of a debutylation catalyst (e.g. p-toluene sulfonic acid) in a solvent consisting of phenol at 150-220 deg.C to prepare isobutylene gas and a bottom solution. In the second process, new phenol or cresol is added to the bottom solution and the unreacted butyl groups are transbutylated to the phenol or cresol to remove the butyl groups from the TBBP at 180-200 deg.C. The above-mentioned method does not require any drastic condition, permits the effective utilization and re-utilization of the recovered isobutylene and phenols and is simple and economical.