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Process for producing polyolefin and vapor-phase polymerization apparatus therefor

A technology of olefin polymerization and polyolefin, applied in chemical/physical/physical-chemical process, chemical instrument and method, chemical/physical process, etc., can solve the problems of blocking the discharge pipe of polymer particles, adhesion, etc.

Inactive Publication Date: 2006-10-18
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, a large amount of lumps and agglomerates, depending on the type of polymerization vessel and polymerization conditions, may still remain in the reaction system, causing problems such as its adhesion to the walls of the polymerization vessel and the stirring blade and clogging of the polymer particle discharge pipe. questions like

Method used

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  • Process for producing polyolefin and vapor-phase polymerization apparatus therefor

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Embodiment 1

[0061] Embodiment 1: the production of propylene-ethylene block copolymer

[0062] (1) Production of magnesium compound (a)

[0063] A glass reactor (capacity: about 12 L) equipped with a stirrer was sufficiently purged with nitrogen, and then charged with 4860 g of ethanol, 32 g of iodine and 320 g of metallic magnesium. The contents of the reactor were heated to react with each other while stirring under reflux until no hydrogen gas was generated from the reaction system to obtain a solid reaction product. The solid reaction product thus obtained was dried under reduced pressure to obtain a magnesium compound (a) [solid product].

[0064] (2) Preparation of solid catalyst component (A)

[0065] Into a three-neck glass Erlenmeyer flask (volume: 5 L) which was sufficiently purged with nitrogen gas, 160 g of the above-mentioned unpulverized magnesium compound (a), 80 ml of purified heptane, 24 ml of silicon tetrachloride and 23 ml of diethyl phthalate were charged. ester. W...

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Abstract

Provided is a process for producing polyolefin by continuous vapor phase polymerization in the presence of an olefin polymerization catalyst, comprising the steps of: feeding a cooling circulating medium into the polymerization vessel from the bottom wall of the polymerization vessel and from at least one position on the sidewall thereof. There is also provided a polyolefin vapor phase polymerization device, comprising: a polymerization vessel equipped with a monomer feeding pipe, a polymer discharge pipe and an optional stirring blade, and a cooling circulating medium from the bottom wall of the polymerization vessel and at least from its side wall One position feeds the mechanical equipment of the polymerization vessel.

Description

technical field [0001] The present invention relates to a process for the production of polyolefins, in particular polyolefins such as propylene block copolymers, and more particularly to a process for the production of polyolefins by a vapor phase polymerization process in the presence of an olefin polymerization catalyst, the The method has no worry of polymer adhering to the wall of a polymerization vessel or a stirring blade used together with it, and can carry out polyolefin production continuously, stably and for a long time; and relates to a vapor phase polymerization device used in the process. Background technique [0002] Polyolefins such as polypropylene and propylene block copolymers have experienced a rapid increase in polymer yield per catalyst weight due to the high activity and high stereoregularity achieved by improved Ziegler-Natta catalysts, And thus its stereoregularity is also improved. As a result, the content of metal components such as transition met...

Claims

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Application Information

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IPC IPC(8): C08F2/34B01J8/08C08F2/01C08F4/64C08F4/6592C08F10/00
CPCB01J19/0066B01J8/087B01J2208/00274C08F10/00
Inventor 金子安延清水惠次郎大田正胜
Owner IDEMITSU KOSAN CO LTD
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