| 简介 |
FIELD : chemistry.SUBSTANCE : invention relates to a method of producing cyclic homo- and co-dimers of styrene and α-methylstyrene via combined oligomerisation of styrene and α-methylstyrene in the presence of acid catalysts, characterised by that the catalyst used is Y and Beta-type zeolites in H-form or cation-decationated form rare-earth-HY, rare-earth-Beta. The reaction is carried out in chlorobenzene in molar ratio styrene : α-methylstyrene =1 : 1, at temperature 80-130°C and amount of catalyst equal to 5-30 wt % (per mixture of monomers).EFFECT : easy synthesis of cyclic homo- and co-dimers of styrene and α-methylstyrene.3 cl, 1 ex, 1 tbl |
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