Catalyst component for ethylene polymerization and catalyst thereof

An ethylene polymerization and catalyst technology, applied in the field of catalyst components and catalysts, can solve the problems of complicated preparation process, increased catalyst cost, long cycle and the like

Active Publication Date: 2011-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is very suitable for the condensation technology of the gas-phase fluidized bed, and can prepare high-quality LLDPE resin, but the preparation process of the catalyst needs to add a haloalkane with a special structure as a modifier, which increases the cost of the catalyst
[0006] To sum up, there are two levels of problems in the prior art. The first level is that alkylaluminum halides are generally used as precipit

Method used

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  • Catalyst component for ethylene polymerization and catalyst thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of solid titanium catalyst:

[0047] Add 2g (21mmol) of magnesium chloride and 13.7g (60mmol) of tetraethoxytitanium into 80ml of toluene, mix at room temperature for half an hour, then heat to 110°C for three hours to form a solution. 5g of silica gel (W.R.Grace & Co.-Com, 955, the pore volume is about 1.1-1.8cm 3 / g, the surface area is about 245-375m 2 / g) was added to the above solution and reacted at 40°C for 2 hours, then added 4ml of diethyl aluminum chloride solution (5mmol / ml) and reacted for 2 hours, left to settle to remove the mother liquor, washed 4 times with hexane, Then add 80ml of hexane and 10ml of titanium tetrachloride, react at 40°C for two hours, remove the upper layer of mother liquor after settling, and wash the lower layer of solid with hexane fully, and dry it to obtain catalyst powder. Ethylene polymerization:

[0048] A 2-liter autoclave was fully replaced with high-purity nitrogen, and then replaced with hydrogen. Under the co...

Embodiment 2

[0050]Add 2g (21mmol) of magnesium chloride and 13.7g (60mmol) of tetraethoxytitanium into 80ml of toluene, mix at room temperature for half an hour, then heat to 110°C for three hours to form a solution. 5g of silica gel (W.R.Grace & Co.-Com, 955, the pore volume is about 1.1-1.8cm 3 / g, the surface area is about 245-375m 2 / g) was added to the above solution, and 4ml of diethyl aluminum chloride solution (5mmol / ml) was added simultaneously, and after reacting for 4 hours at a temperature of 40°C, the mother liquor was left to settle to remove, washed 4 times with hexane, and then Add 80ml of hexane and 10ml of titanium tetrachloride, react at 40°C for two hours, remove the upper layer of mother liquor after settling, and wash the lower layer of solid with hexane to obtain catalyst powder after drying. The catalyst was polymerized in the same manner as in Example 1, and the results are listed in Table 1.

Embodiment 3

[0052] Add 2g (21mmol) of magnesium chloride and 13.7g (60mmol) of tetraethoxytitanium into 80ml of toluene, mix at room temperature for half an hour, then heat to 110°C for three hours to form a solution. With 5g of silica gel (PQ Corporation, MS3050, the pore volume is about 2.4-3.7cm 3 / g, the surface area is about 410-620m 2 / g) was added to the above solution and reacted at 80°C for 2 hours, then added 4ml of diethyl aluminum chloride solution (5mmol / ml) and reacted for 2 hours, left to settle to remove the mother liquor, washed 4 times with hexane, Then add 80ml of hexane and 10ml of titanium tetrachloride, react at 40°C for two hours, remove the upper layer of mother liquor after settling, and wash the lower layer of solid with hexane fully, and dry it to obtain catalyst powder. The catalyst was polymerized in the same manner as in Example 1, and the results are listed in Table 1.

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Abstract

The invention provides a catalyst component for ethylene polymerization, which is prepared by a method comprising the following steps of: (1) reacting an alkoxy titanium compound (a) with a magnesium compound (b) to form a solution; (2) adding a porous inorganic oxide (d) and halogenated alkyl aluminum (e) to the solution prepared in the step (1) to separate out sediment; and (3) reacting a liquid titanium compound (h) with the sediment obtained in the step (2) to obtain a titanium-included solid catalyst component. The halogenated alkyl aluminum (e) can be one or more than one of organic aluminum compounds with the general formula of AlRnX3-n, wherein R represents alkyl, aralkyl and aryl with 1-20 hydrogen or carbon atoms, X represents halogen, and n represents an integer which is not less than 0 and not more than 3. The preparation method of the catalyst is simple and has low cost; and when applied to ethylene polymerization, the catalyst has higher activity, and the obtained ethylene polymers have centralized particle size distribution and less content of fine powder.

Description

technical field [0001] The present invention relates to a catalyst component and catalyst for ethylene polymerization. More specifically, it relates to a catalyst component prepared by reacting alkoxytitanium, magnesium compound, haloalkylaluminum, porous oxide carrier and liquid titanium compound and the catalyst thereof. technical background [0002] As we all know, in the current industrialized process for preparing ethylene polymers, if the catalyst used has high catalytic activity, not only can the output be increased, but also the problem of catalyst residue in the unit polymer can be reduced, and the halogen in the residual catalyst may Causes mold rusting problems in polymer post-processing molding processes. At the same time, in the existing various polymerization processes, the prepared ethylene polymers are required to have good fluidity, less fine powder and excellent particle size distribution, which can reduce the troubles encountered in the post-processing of...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645C08F4/02C08F4/654
Inventor 崔楠楠周俊领闫力欣黄廷杰刘树军
Owner CHINA PETROLEUM & CHEM CORP
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