TH19099A - Polymerization process Alpha-olefins in the gas phase - Google Patents

Abstract

Continuous process for one olefin polymerization CH2 = CHR or Than in the gas cycle Which is operated in one or more fluidised bed reactors. Which contains the polymerization zone And gas speed reduction zone Above the bate, the fluidized bed reactor is connected to the gas recycle line, which includes at least one compressor and at least one refrigeration device. By the way in which the gas exiting the end of the reactor is pressed, cooled and sent to another reactor at the lower end of the reactor, the specific characterization process is the fact that make-up monomer or monomers are transmitted directly to fluidised bed reactor at one or more points above the fluidised bed

Claims (7)

1. Continuous process for olefin polymers CH2 = CHR in the phase in a gas. Or greater, when R is a hydrogen or an alkyl cycloalcylkyl or aryl rays with 1 to 12 carbon atoms.Use a catalyst containing the product of the reaction among the following elements: (A Titanium compounds Or Vanadium, with at least one Ti-halogen or V-halogen bond, respectively. Magnesium halide And select a substance for one electron; (B) One trialkyl-aluminum compound: (c) Select a compound for one electron. Such polymers are performed in one or more fluidesed bed reactor, consisting of a polymerized zone. And the fluidised bed reactor gas reduction zone is connected to the recycle line, consisting of compression and refrigeration equipment. By means of which gas At the end of the reactor is pressed, cooled and sent to another reactor at the bottom of the reaction zone. Characterized by the fact that make-up monomer or monomers are directed one or more points into the fluidised bed reactor above the fluidesed bed. 2. The process according to claim 1 characterizes the fact that polymers The session is performed in the presence of 3 to 5 carbon atoms alkanes. 3. The process of claim 2 characterizes the fact that the alkanes are propane. 4. The process of claim 1 characterizes the fact that before entering the gas phase reactor the catalyst elements are carried out as follows: (a) precontacting Catalyst elements in the absence of olefins that can Polymerization can Or in the presence of less than 5 g of such olefins per gram of the component Solid catalyst (A) solid (b) olefin prepolymerization, formula CH2 = CHR one or more types. Between 10 g per gram of solid component (A) and 10% of the solid catalyst Final result 5. The process according to claim 1 characterizes the fact that at least the make-up monomer or monomers are fed to the gas phase reactor as a liquid. 6. Process according to claim 4 characterizes the fact that make-up monomers or monomers are fed to the gas phase reactor in conjunction with the current exiting. prepolymerization reactor 7. Process according to claim 1 characterizes the fact that gas phase polymerization Operates in at least 2 reactor series