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Catalyst carrier and its catalyst for polymerizing ethane

A catalyst carrier, ethylene polymerization technology, applied in the catalyst and catalyst application field, can solve the problems of narrow catalyst particle size distribution, production environment impact, difficult solvent recovery, etc., and achieve the effects of low equipment requirements, low environmental pollution, and simple preparation method

Active Publication Date: 2009-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the preparation process of the catalyst in this patent, the dissolution temperature of magnesium chloride and fatty alcohol needs a high temperature of 120 to 140 ° C, and a large amount of high-carbon paraffin solvents such as decane are used, and solvent recovery is difficult; Titanium tetrachloride is easy to cause corrosion to equipment and affect the production environment
[0004] Chinese patent ZL91111840 discloses a catalyst preparation method, which uses an alkylmagnesium compound, an electron donor without active hydrogen and no ester functional groups, and a chlorination reagent to prepare a magnesium chloride-containing carrier, which can prepare a high titanium content catalyst, the particle size distribution of the catalyst is also narrow, but the catalyst prepared by this patent is less active for ethylene polymerization

Method used

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  • Catalyst carrier and its catalyst for polymerizing ethane
  • Catalyst carrier and its catalyst for polymerizing ethane
  • Catalyst carrier and its catalyst for polymerizing ethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of catalyst support:

[0038] (1) Get 150ml of dibutylmagnesium heptane solution (concentration is 1M, the product of American Aldrich Company) and add in the fully dry reaction bottle, immerse the reaction bottle in ice-water bath to cool, then slowly add dropwise 46.5ml2-ethylhexyl Alcohol, fully stirred and reacted to obtain a magnesium compound.

[0039] (2) under nitrogen protection, the magnesium compound prepared in step (1) is mixed at normal temperature with the dibutyl phthalate of 75mmol, then slowly drip in the reactor that 86ml silicon tetrachloride is housed, heat up to 36-40°C, stirred and reacted at this temperature for 10 hours, filtered, washed 6 times with hexane, and dried with nitrogen to obtain a magnesium chloride carrier.

[0040] Preparation of catalyst components:

[0041] Suspend the catalyst carrier in 100ml of n-hexane, add 33ml of titanium tetrachloride dropwise, then heat the suspension to 60°C, keep stirring at this temperat...

Embodiment 2

[0045] The dibutyl phthalate in embodiment 1 is replaced by dimethyl phthalate, and other conditions are the same as embodiment 1.

[0046] The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

Embodiment 3

[0048] The silicon tetrachloride consumption in embodiment 1 is adjusted to 150ml, and other conditions are with embodiment 1.

[0049] The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

A carrier of ethylene polymerization or copolymer catalyst, its production, and catalyst component made from it, catalyst and its usage of catalyst are disclosed. The carrier consists of magnesium compound containing hydrocarbon and alkoxide, carboxylic ester compound and chlorine compound, magnesium compound is contact product of branching fatty alcohol and dialkyl-based magnesium in proportion of 0.5-1.99 mol. It's simple and cheap, has higher catalyst activity, narrow grain size distribution, better copolymer performance and no environmental pollution. It can be used for polymerization of sludge pulp method and gas-phase method.

Description

technical field [0001] The invention relates to a Ziegle-Natta catalyst carrier for olefin, especially ethylene polymerization, a catalyst component and a preparation method thereof, as well as the catalyst prepared with the catalyst component and the application of the catalyst. technical background [0002] As is well known, the Ziegler-Natta catalyst system is composed of at least one transition metal (such as titanium) compound and at least one metal (such as aluminum) organic compound as a cocatalyst. And when the solid inorganic compound of magnesium chloride is used as the carrier together with the titanium compound, the activity of the catalyst is much higher than that of the pure titanium compound. Due to the important role of magnesium chloride in the preparation of Ziegler-Natta catalysts, most of the currently widely used Ziegler-Natta catalysts contain magnesium chloride, and the properties and preparation methods of the magnesium chloride carrier are crucial to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/645C08F4/02
Inventor 高克京吕新平王如恩王仪森赵勤芳程晓静
Owner CHINA PETROLEUM & CHEM CORP