PROCESS FOR FEEDING CATALYST TO FLUIDIZED BED FOR VAPOR PHASE POLYMERIZATION

摘要

PCT No. PCT/JP91/00968 Sec. 371 Date Mar. 19, 1992 Sec. 102(e) Date Mar. 19, 1992 PCT Filed Jul. 19, 1991 PCT Pub. No. WO92/01722 PCT Pub. Date Feb. 6, 1992.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.