Patent ID: 6403852
Filing Date: 2002-06-11
Classification: B01J,C07C

Abstract:
A process for producing an alkenyl-substituted aromatic hydrocarbon which comprises:alkenylating an alkyl-substituted aromatic hydrocarbon having a hydrogen atom at an &agr;-position of a side chain thereof with a conjugated diene, in the presence of a catalyst selected from the group consisting of: (1) a solid base catalyst obtained by the steps of: (a) reacting an alkali metal compound selected from the group consisting of potassium hydroxide, potassium carbonate, potassium hydrogencarbonate, potassium alkoxide, a potassium salt of an organic acid, sodium hydroxide, sodium carbonate, sodium hydrogencarbonate, and sodium alkoxide, with alumina by heating in a temperature range of 70Â° C. to 500Â° C., and (b) reacting the resulting mixture from step (a) with potassium metal or potassium hydride in an inert gas atmosphere by heating in a temperature range of 70Â° C. to 500Â° C.; and (2) a solid base catalyst obtained by the step of reacting (i) a potassium compound selected from the group consisting of potassium hydroxide, potassium carbonate, potassium hydrogencarbonate, potassium alkoxide, and a potassium salt of an organic acid, and (ii) sodium metal or sodium hydride with hydrotalcite by heating in a temperature range of 100Â° C. to 700Â° C. in an inert gas atmosphere.