UNSATURATED DIMER PRODUCTION FROM ALPHA-ALKYLSTYRENE

PURPOSE:A divalent exchange type synthetic mica is used as a catalyst to effect the dimerization of an alpha-alkylstyrene to enable high-efficiency production of an unsaturated dimer of alpha-alkylstyrene in high selectivity with high catalyst activity even at low temperatures. CONSTITUTION:The dime...

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Bibliographic Details
Main Authors NAKAMURA HIDEO, SAEKI KENJI, TAKAHATA KAZUNORI
Format Patent
LanguageEnglish
Published 15.10.1984
Subjects
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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Summary:PURPOSE:A divalent exchange type synthetic mica is used as a catalyst to effect the dimerization of an alpha-alkylstyrene to enable high-efficiency production of an unsaturated dimer of alpha-alkylstyrene in high selectivity with high catalyst activity even at low temperatures. CONSTITUTION:The dimerization of an alpha-alkylstyrene of the formula (R1 is lower alkyl such as methyl or ethyl; R2 is 1-4C lower alkyl; n is 1-5) is effected in the presence of a catalyst of divalent metal exchange type synthetic mica at 50-160 deg.C, preferably 70-160 deg.C to give the objective compound. The synthetic mica is mainly composed of alamella compound of SiO2 where Si atoms are based on tetrahedral SiO4 and extended as a hexagonal network plane and metal ions distributes between the lamellas. The divalent metal ions are preferably copper and magnesium divalent ions.
Bibliography:Application Number: JP19830052496