Verfahren und Vorrichtung zur Polymerisation von Olefinen in der Gasphase

摘要

1,226,666. Polymerisation apparatus. METALLGESELLSCHAFT A.G. 15 May, 1968 [27 May, 1967], No. 23162/68. Heading B1X. [Also in Division C3] Apparatus for the polymerization of a gaseous or vaporous monomer comprises, as shown in Fig. 1, diffusers 1 which are welded into plates 13 and 14 and surrounded by shell 2. Coolant is fed through pipe 9 into space 15 and withdrawn through pipe 10. Fluidizing gas containing the monomer is supplied from receiver 4 which contains a device 17 for uniformly distributing the gas flow. Cylindrical tube 20 is connected to the openings at the top end of the diffusers and forms an expansion chamber for the fluidized bed and a stilling section for the gas. Intermediate section 16 connects the expansion chamber to a chamber 3 for the separation of particles entrained by the gas. The polymer granules formed are collected in bottom 5 of the reactor. Catalyst is supplied through pipes 11 and a coolant through pipes 12. The top part of the diffusers may be of hexagonal instead of circular configuration. The apparatus in Fig. 4 (not shown) comprises two fluidizing reactors of the type shown in Fig. 1, the second stage reactor being disposed under the first stage one.