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Catalyst carrier for olefin polymerization and preparation method thereof

A technology of catalyst carrier and olefin polymerization, applied in the field of catalyst carrier, can solve the problems of poor catalyst efficiency and orientation ability, cumbersome catalyst preparation process, etc., and achieve the effects of excellent comprehensive performance, good hydrogen adjustment sensitivity, and high catalytic activity

Active Publication Date: 2015-03-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Subsequently, another patent of the company, US4399054, announced the use of magnesium chloride alcoholate melt in the dispersion medium for high-pressure ejection or high-speed stirring and dispersion, and then formed in a cold bath to obtain a spherical carrier, and then obtained a spherical catalyst with this carrier, but the efficiency of the catalyst and poor orientation
UCC patent US4293673 discloses a catalyst prepared by using a composite carrier of silica gel and magnesium chloride. The catalyst has high activity in the gas phase polymerization process, and the prepared ethylene polymer has a good particle shape. However, the preparation of this type of catalyst The process is more cumbersome

Method used

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  • Catalyst carrier for olefin polymerization and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take 30ml of hexane, 3.15ml of dibutylmagnesium hexane solution (1M) and 1.0ml of isooctyl alcohol in turn, raise the temperature to 50°C and keep stirring for half an hour to obtain a transparent solution, then add styrene butadiene triblock Copolymer (Kraton, FG1901X, wherein polybutadiene content 70%) hexane solution (10g / L) 3ml, cool down to-10 ℃, add 0.36 milliliters of silicon tetrachloride, naturally slowly heat up, rise to room temperature, heat The reaction was maintained at 50°C for 2 hours. The temperature of the suspension is lowered to room temperature, left to stand, settled, washed three times with hexane, and the consumption of each hexane is 50 milliliters, after the washing is completed, the off-white solid fluidity powder is dried, and its particle shape is good, and the average particle diameter is 11.9 microns, particle size distribution see attached figure 1 .

[0035] Elemental analysis: Mg: 20.18% by weight, Cl: 35.79% by weight.

Embodiment 2

[0037] Under the protection of nitrogen, add 3.76 g of the spherical carrier particles obtained in Example 1 into a 250 ml glass reactor, add 50 ml of n-hexane, stir to form a slurry, cool down to 0°C with a low-temperature bath, and slowly add 20.0 ml of four The hexane solution of titanium chloride (containing 2.0 ml of titanium tetrachloride) was stirred and reacted for 1 hour, and then the temperature was slowly raised to 50° C. and kept stirring for 2 hours. After reaction finishes, leave standstill, filter out liquid, wash filter cake twice with 40 milliliters of hexanes, solid is blown dry with nitrogen, obtains the magnesium chloride carrier catalyst 3.27 grams that has good fluidity, and its average particle diameter is 13.4 microns .

[0038] Elemental analysis (ICP): Ti: 2.37% by weight, Mg: 16.79% by weight.

[0039] The evaluation conditions for the ethylene slurry polymerization of the catalyst are as follows:

[0040] Ethylene polymerization evaluation A: Add ...

Embodiment 3

[0043] The method for preparing the carrier is basically the same as in Example 1, but "1.0ml isooctyl alcohol" is changed to "0.6ml n-butanol", and "addition of styrene butadiene triblock copolymer (Kraton, FG1901X, where Polybutadiene content 70%) hexane solution (10g / L) 3ml" is changed to "add styrene butadiene triblock copolymer (Kraton, FG1901X, wherein polybutadiene content 70%) hexane solution ( 10g / L) 1ml". The average particle diameter of the obtained carrier was 50.8 micrometers.

[0044] Elemental analysis: Mg: 25.79% by weight, Cl: 30.16% by weight.

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Abstract

The invention provides a catalyst carrier for olefin polymerization. The catalyst carrier for the olefin polymerization comprises a reaction product which is formed by at least one compound containing organic-magnesium, at least one compound containing hydroxyl, at least one organic-silicon compound containing chlorine, and at least one furtherance type separating-out agent. The furtherance type separating-out agent is a polystyrene block polybutadiene (SB) copolymer. The invention further correspondingly provides a preparation method of the catalyst carrier. The catalyst carrier which is prepared through the method has good particle morphology and distribution, and therefore using of catalyst in devices of polymerization processes such as gaseous phase and slurry is benefited.

Description

technical field [0001] The invention relates to a catalyst carrier for homopolymerization or copolymerization of olefins, a preparation method and application of the catalyst carrier. Background technique [0002] Since the successful development of high-efficiency polyolefin catalysts in the 1970s, the world polyolefin industry has undergone tremendous changes. Over the past 20 years, with the development of olefin polymerization process, the catalysts matching the polymerization process have also made great progress. Among them, high-efficiency catalysts still occupy an important role in the field of polyolefin catalysts due to their excellent polymerization performance and mature application technology. status. After years of exploration and research, the preparation method of Mg-Ti high-efficiency catalysts has also developed from the co-grinding method, the suspension impregnation method to the preformed carrier and then the chemical reaction method. [0003] There ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/00C08F4/02
Inventor 王世波周俊领刘东兵吕新平张磊毛炳权周歆邢宝泉张长礼
Owner CHINA PETROLEUM & CHEM CORP