PRODUCTION OF TRIALKYLHYDROQUINONE

PURPOSE:The isomerization of 4-alkoxy-2,6-dialkylphenol is effected only by bringing it into contact with a solid acid catalyst to permit high-yield production of the titled compound which is used as a synthetic intermediate of medicines such as vitamin E and additives for resins. CONSTITUTION:2-Alk...

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Hauptverfasser:	TANIGUCHI KATSUO, IMAGAWA MASAO, TANAKA MICHIO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:The isomerization of 4-alkoxy-2,6-dialkylphenol is effected only by bringing it into contact with a solid acid catalyst to permit high-yield production of the titled compound which is used as a synthetic intermediate of medicines such as vitamin E and additives for resins. CONSTITUTION:2-Alkoxy-2, 6-dialylphenol such as 4-methoxy-2, 6-dimethylphenol is brought into contact with a solid acid catalyst such as alumina, silica-alumina, or magnesia-titania under heating to give 2,3,6-trialkylhydroquinone. The above catalytic reaction is carried out in vapor phase, preferably in the temperature range from 300 to 400 deg.C at a space velocity of 0.01-5hr in an inert gas such as argon. The process can be effected in liquid phase as well.