Olefin polymerization catalyst and preparation method thereof and olefin polymerization method

An olefin polymerization and catalyst technology, applied in the field of olefin polymerization, can solve the problems of complex synthesis and purification process of glycol ester compounds, high catalyst production cost, low catalyst activity, etc., and achieves low production cost, high olefin polymerization activity, and catalyst activity. high effect

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the catalyst system is used for propylene polymerization, the obtained polymer has high isotacticity and high apparent density, but the catalyst activity is not high
[0004] CN1453298A discloses a class of glycol ester compounds containing special structures as electron donors. The use of

Method used

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  • Olefin polymerization catalyst and preparation method thereof and olefin polymerization method

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preparation example Construction

[0037] The method for preparing olefin polymerization catalyst of the present invention comprises:

[0038] (1) contacting the magnesium compound, the silane compound, the organophosphorus compound and the organic epoxy compound in a solvent to form a homogeneous solution;

[0039] (2) In the presence of a precipitation aid, contacting the homogeneous solution with a titanium compound to obtain a mixture;

[0040] (3) Contact the mixture obtained in step (2) with the internal electron donor compound, filter, wash, and dry to obtain an olefin polymerization catalyst; wherein at least one of the magnesium compound and the titanium compound is a halogen-containing compound.

[0041] According to the present invention, although the purpose of the present invention can be achieved as long as the silane compound is introduced in the process of preparing the olefin polymerization catalyst, there is no special requirement on the amount of the various substances, and they can be formul...

Embodiment 1

[0064]In the atmospheric pressure reactor repeatedly replaced by high-purity nitrogen, 4.8 grams of anhydrous magnesium chloride, 70 milliliters of toluene, 4.0 milliliters of epichlorohydrin, 12.5 milliliters of tributyl phosphate and 1.0 milliliters of tetraethoxysilane were added successively. Under the condition of 60 DEG C, reacted for 1 hour, added 1.4 grams of phthalic anhydride and 30 milliliters of toluene, continued to react for one hour, cooled to -28 DEG C, added dropwise 56 milliliters of titanium tetrachloride (drop speed 5 milliliters / min ), gradually warming up to 85°C (heating rate of 5°C / min), adding 1.1 ml of di-n-butyl phthalate (DNBP), keeping the temperature for one hour, filtering, washing twice with toluene, and then adding titanium tetrachloride 48 milliliters, 72 milliliters of toluene, kept at 110°C for 0.5 hours, filtered and then added 48 milliliters of titanium tetrachloride, 72 milliliters of toluene, treated once at 110°C for 0.5 hours, then filt...

experiment Embodiment 1

[0066] After 5 liters of stainless steel autoclaves were fully replaced with nitrogen, 5 milliliters of concentrations were added to be a hexane solution of 0.5 mol / liter of triethylaluminum and 1 milliliter of concentrations to be 1 mol / liter of methylcyclohexyldimethoxysilane ( CMMS) hexane solution and 10 mg of catalyst prepared in Example 1, then add 10 milliliters of hexane to flush the feed line, then add 1 liter (under standard state) hydrogen, and 2 liters of refined propylene, and heat up to 70 ° C. Polymerization was carried out at temperature for 1 hour. After the reaction, the temperature of the reactor was lowered and the stirring was stopped to discharge the reaction product to obtain an olefin polymer. See Table 1 for details of the results.

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Abstract

The invention provides an olefin polymerization catalyst, which contains titanium, silicon, magnesium, phosphorus, an internal donor compound and halogen. The invention further provides a method for preparing the olefin polymerization catalyst disclosed by the invention. The invention further provides an olefin polymerization method. Silicon is introduced into the olefin polymerization catalyst, so that the catalytic activity of the olefin polymerization catalyst for olefin polymerization is 1.1-1.5 times higher than that of a catalyst into which silicon is not introduced in the prior art. According to the method for preparing the olefin polymerization catalyst disclosed by the invention, a silane compound is introduced in the contacting process of a magnesium compound, an organic epoxy compound and an organic phosphorus compound in a solvent, so that the activity of the prepared catalyst is much higher than that of a catalyst obtained with a method in which a silane compound is not introduced in the prior art. The method disclosed by the invention has the advantages of readily-available raw materials and low production cost.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst, a preparation method thereof, an olefin polymerization catalyst and a method for olefin polymerization using the olefin polymerization catalyst. Background technique [0002] In the late 1970s, companies such as Mitsui Petrochemical Corporation of Japan and Monai of the United States successfully developed titanium-magnesium high-efficiency carrier catalysts with magnesium chloride as the carrier. Because the carrier was used to improve the utilization rate of the active center of the titanium atom, the catalytic activity was improved. It is much higher than conventional catalysts and simplifies the polymerization process, so the world's polyolefin industry has developed rapidly. Conventional methods for preparing highly active supported catalysts are generally co-grinding, grinding and impregnating, spraying carrier forming and high-speed stirring carrier forming, etc. The main disadvantage ...

Claims

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Application Information

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IPC IPC(8): C08F210/02C08F4/646C08F4/658C08F4/654C08F4/656
Inventor 郭正阳雷世龙刘萃莲洪挺王宇王迎任春红付梅艳
Owner CHINA PETROLEUM & CHEM CORP
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