Nippon Petrochemicals Company, Limited

Masatoshi Morikawa

Kunimichi Kubo

Yoshihisa Yamaguchi

Motokazu Watanabe

Mamoru Yoshikawa

Shinjiro Suga

Yasuhiko Sano

A process for producing polyolefin with a vapor-phase fluidized-bed reactor, wherein the reaction is started after filling the reactor with particles which contain moisture and/or molecular oxygen and can form a fluidized bed in order to prevent the formation of molten resin which is liable to occur at the start of the reaction and to attain a smooth operation of the reactor.

Method for producing polyolefin

A process for feeding a powder catalyst with a gas intermittently to a high-pressure fluidized bed reactor for the vapor phase polymerization of olefin, wherein the cross section of a catalyst feed pipe is reduced midway through the pipe to thereby make continual catalyst feeding possible and prevent the formation of a lump polymer.

Process for feeding catalyst to fluidized bed for vapor phase

Growing community of inventors

Setagaya, Japan

Masatoshi Morikawa