Multi-zone reactor for continuous polymerization of alpha-olefin monomers

Abstract

The present invention relates to a multi-zone reactor suitable for the continuous fluidized bed polymerization of one or more alpha-olefin monomers, at least one of which is ethylene or propylene, which multi-zone reactor can be used in Operating in condensation mode, the multi-section reactor includes a first section, a second section, a third section, a fourth section and a distribution plate, wherein the first section and the second section separated by the distribution plate, wherein the multi-zone reactor extends vertically, wherein the second zone of the multi-zone reactor is located above the first zone, and wherein the said third section of said multi-zone reactor is located above said second section, and wherein said fourth section of said multi-zone reactor is located above said third section, wherein The second section comprises an inner wall, wherein at least a portion of the inner wall of the second section is in the form of a progressively increasing inner diameter or a continuously open cone, wherein the diameter or the opening is directed towards the A vertically increasing top of a multi-zone reactor, wherein the third zone comprises an inner wall, wherein at least a portion of the inner wall of the third zone is in the form of a progressively increasing inner diameter or a continuous open cone body, wherein said diameter or said opening increases vertically towards the top of said multi-zone reactor, wherein said inner wall of said third zone has a maximum diameter greater than that of said second zone The maximum diameter of the inner wall.

Description

technical field [0001] The present invention relates to a multi-zone reactor suitable for the continuous polymerization of alpha-olefin monomers, a method of using the reactor, a system comprising the reactor, a method of using the reactor, a method of using the system , a polyolefin obtainable by said process, and uses relating to said multi-zone reactor and uses relating to said system. Background technique [0002] There are many different methods for polymerizing alpha-olefin monomers, including gas phase fluidized bed methods, slurry, loop or stirred tank reactors, suspension and solution methods. [0003] The discovery of a process for the production of polyolefins in a fluidized bed has provided means for the production of a different series of polyolefins such as polyethylene, polypropylene and polyolefin copolymers. The use of fluidized bed polymerization processes substantially reduces energy requirements and most importantly the capital investment required to run...

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Problems solved by technology

[0009] However, the heat removal achievable in such a condensing mode is still limited because current reactors, systems and methods for producing polyolefins using a fluidized bed and condensing mode do not allow large amounts of liquid in the recycle stream, because this causes destabilization of the fluidized bed

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