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Olefin polymerization method

A polymerization method and olefin technology, applied in the field of olefin polymerization, can solve the problems of poor controllability, complicated catalyst preparation process, etc.

Inactive Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method makes the catalyst preparation process cumbersome and poor in controllability

Method used

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  • Olefin polymerization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of catalyst components

[0033] Add 0.9 ml (1.5 g) of TiCl to a 250 ml three-neck bottle that has been purged with nitrogen 4 , 4.0 g anhydrous MgCl 2 With 0.68 g of acetonitrile and 100 ml of tetrahydrofuran, the temperature was raised to 65° C. under stirring, and the reaction was carried out at this temperature for 3 hours. Cool down to 35°C.

[0034] Add 6 grams of silica gel (Cabot Corporation TS-610 particle size 0.02-0.1 micron) into a 250ml three-neck bottle that has been purged with nitrogen, add the cooled mother liquor, keep the temperature at 35°C, stir for 1 hour, and then mix the silica gel The final mother liquor was spray-dried with a spray dryer, spraying conditions: inlet temperature 195°C, outlet temperature 110°C, to obtain a solid catalyst component, wherein the titanium content was 2.2wt%.

[0035] (2) Polymerization method

[0036] Add 1 liter of hexane in the 2 liters of polymerizer that has been replaced by nitrogen, add 1 mm...

Embodiment 2

[0038] (1) Preparation of catalyst component: with embodiment 1

[0039] (2) Polymerization method: Ti / trichloroethanol=1:2, other steps are the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0041] (1) Preparation of catalyst component: with embodiment 1

[0042] (2) Polymerization method: Ti / trichloroethanol=1:3, other steps are the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

The present invention relates to an olefin polymerization method, which is characterized in that an olefin, a Ziegler-Natta spray drying catalyst, an assistant catalyst, a halohydrin and a molecular weight regulator are combined in a slurry phase. With the method, the polymerization activity of the catalyst and the bulk density of the polymer are effectively increased.

Description

technical field [0001] The invention relates to an olefin polymerization method, in particular to a method in which a Ziegler-Natta spray-dried olefin polymerization catalyst is used in the slurry phase to produce polyolefin. Background technique [0002] In the polymerization reaction of ethylene or the copolymerization reaction of ethylene and α-olefin, the catalyst composed of titanium, magnesium, halogen and electron donor is mostly used. The catalyst should not only have high activity, but also the catalyst and its polymer should have good particle shape and high packing density. [0003] Many catalysts used for ethylene polymerization are formed by spraying silica gel, and the catalyst particles formed by silica gel spraying are regular in shape. Among such catalysts, MgCl 2 The solubility in the solvent is particularly important, and only a high solubility can ensure a certain anti-shattering strength of the catalyst, because MgCl 2 Play the role of bonding seconda...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/658C08F2/06C08F10/02
Inventor 安京燕闫力欣黄廷杰张彤瑄王如恩纪卫民
Owner CHINA PETROLEUM & CHEM CORP
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