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US 4,588,790 AGranted
Method for fluidized bed polymerization
AssigneeUnion Carbide Corporation
InventorsJohn M. Jenkins, III, Russell L. Jones, Thomas M. Jones, Samil Beret
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AssigneeUnion Carbide Corporation
InventorsJohn M. Jenkins, III, Russell L. Jones, Thomas M. Jones, Samil Beret
Estimating the term…
A continuous gas fluidized bed process is disclosed for the production of polymer from monomer wherein a gaseous stream comprising monomer is passed through a fluidized bed in a reaction zone in the presence of catalyst under reactive conditions, withdrawing from the reaction zone polymeric product and a stream comprising unreacted gases and solid particles, cooling the stream and recycling the cooled stream to the reaction zone together with sufficient additional monomer to replace monomer polymerized and withdrawn as polymer product, and wherein at least a part of the recycle stream is cooled to condense a portion thereof and form a liquid-containing mixture wherein the weight ratio of liquid to solid particles is not less than about two to one, and introducing the mixture into the reaction zone wherein the liquid in the mixture is vaporized.
In a continuous gas fluidized bed process for the production of polymer by continuously passing a gaseous stream comprising monomer through a fluidized bed in a reaction zone in the presence of catalyst under reactive conditions, withdrawing from said reaction zone polymer product and a stream comprising unreacted gases and solid particles, cooling said stream and recycling said cooled stream to said reaction zone together with sufficient additional monomer to replace monomer polymerized and withdrawn as polymer product, the improvement comprising cooling at least a part of said recycle stream to condense a portion thereof and form a liquid-containing mixture wherein the weight ratio of liquid to solid particles is not less than about two to one, and introducing said mixture into said reaction zone wherein the liquid in said mixture is vaporized.
A method for controlling the temperature of the reaction zone during the production of polymer from monomer in a gas fluidized bed by an exothermic polymerization reaction comprising continuously introducing a monomer-containing stream comprising a gas phase and a liquid phase into the bottom of said bed where said liquid phase is vaporized, said liquid phase comprising from 2 to about 20 weight percent of said stream and the weight ratio of liquid to any solid particles in said stream is not less than about two to one.
A process for producing polymer from monomer by an exothermic polymerization reaction in a reaction zone containing a bed of gas fluidized growing polymer particles which comprises:
Dependencies are inferred from the claim text.