Method of vapor phase polymerization, vapor phase polymerizer an

Details Method of vapor phase polymerization, vapor phase polymerizer an Method of vapor phase polymerization, vapor phase polymerizer an

1997-05-14

1999-10-05

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526901, 422139, C08F 234

Patent

active

059626070

ABSTRACT:
A method for vapor phase polymerization comprises blowing a gaseous monomer from a bottom of a fluidized bed reactor through a distributor plate into the reactor by means of a blower while feeding a solid catalyst into the reactor to thereby form a fluidized bed in the reactor and conducting a vapor phase polymerization to produce a polymer or copolymer, wherein the blower has a slide or rotational slide part between its discharge side as a high pressure side and its suction side as a low pressure side in a blower body casing, said slide or rotational slide part being provided with a noncontacted gas leakproof seal part at a clearance ranging from 0.7 to 2.5 mm.

REFERENCES:
patent: 3275225 (1966-09-01), Schultz
patent: 5462999 (1995-10-01), Griffin et al.
patent: 5668228 (1997-09-01), Chinh et al.
Patent Abstracts of Japan, vol. 96, No. 8, Aug. 30, 1996 & JP 08 100008 A (Kobe Steel Ltd.) Apr. 16, 1996--& Database WPI Section Ch, Week 9625 Derwent Publications Ltd., London, GB.
Patent Abstracts of Japan, vol. 97, No. 2, Feb. 28, 1997 & JP 08 284881 A (Mitsubishi Chem. Corp. & Kobe Steel Ltd.) Oct. 29, 1996 & Database WPI Section PQ, Week 9702.
Patent Abstracts of Japan, vol. 96, No. 6, Jul. 31, 1995 & JP 07 071398 A (Kobe Steel Ltd.).

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