Process for preparing isopropenyl phenol

Details Process for preparing isopropenyl phenol Process for preparing isopropenyl phenol

C - Chemistry, Metallurgy

07

C

260/621.1

C07C 39/06 (2006.01) C07C 37/52 (2006.01)

Patent

CA 1145364

Abstract of the Disclosure A novel process for producing isopropenyl phenol such as p-isopropenyl phenol which comprises continuously feeding oligomers of isopropenyl phsnol having a degree of polymerization of 2 to 5 into a high-boiling inert organic reaction medium such as an alkylnaphthalene heated at 150 to 250°C under a pressure of 10 to 100 mmHg while maintaining the concentration of the oligomers in the reaction medium at not more than 30% by weight, thereby thermally decomposing the oligomers in the reaction medium; and continuously distilling off the resulting isopropenyl phenol out of the reaction system and recovering it. The process almost quantitatively gives isopropenyl phenol having reduced contents of impurities.

333726

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