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Propylene polymerization catalyst, preparation method and application thereof

A technology of propylene polymerization and catalyst, applied in the application of catalyst in propylene homopolymerization or propylene and α-olefin copolymerization, catalyst for propylene homopolymerization or copolymerization, catalyst preparation field, can solve the problem of low isotacticity, melting Low index problem, achieve high isotacticity, high melt index, simple preparation method

Inactive Publication Date: 2017-05-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is mainly to provide a propylene polymerization catalyst and its preparation method and application, so as to overcome the disadvantages of low isotacticity and low melt index of products polymerized by using the propylene polymerization catalyst in the prior art

Method used

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  • Propylene polymerization catalyst, preparation method and application thereof
  • Propylene polymerization catalyst, preparation method and application thereof
  • Propylene polymerization catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] In the reactor that has been fully replaced by nitrogen, add 1.0 g of spherical MgCl in sequence 2 Carrier, 20ml of decane, stirring at high speed, slowly drop into 25ml of titanium tetrachloride and 4 mmol of internal electron donor diethyl phthalate at -20°C, keep the temperature for 1 hour, then raise the temperature to 100°C React for 2 hours, stop stirring, let it stand, and filter; then add 30ml of hexane at -20°C, slowly drop in 25ml of titanium tetrachloride, keep this temperature for 1 hour, raise the temperature to 100°C for 2 hours, stop stirring, Leave standstill, filter, wash four times (each 30 milliliters) with 60 ℃ of hexanes, dry, obtain good fluidity, uniform particle size distribution, spherical powdery solid procatalyst, the mass of Ti in the solid procatalyst is 100% Min content is 3.7%.

[0047] After a 2-liter stainless steel autoclave was fully replaced with nitrogen, 20 mg of the main catalyst prepared above, 3.0 ml of a hexane solution of a co...

Embodiment 2

[0049] In the reactor that has been fully replaced by nitrogen, add 1.0 g of spherical MgCl in sequence 2 Carrier, 25ml of decane, stirring at high speed, slowly drop into 20ml of titanium tetrachloride and 6 mmol of internal electron donor triethoxymethoxysilane at -15°C, keep the temperature for 1 hour, and then raise the temperature to 100 ℃ for 2 hours, stop stirring, let stand, filter, then add 20ml of decane to the system at -10℃, then slowly drop 15ml of titanium tetrachloride, stir, keep this temperature for 1 hour, slowly raise the temperature to 80 ℃ of reaction 2 hours, leave standstill, filter, 60 ℃ of hexane washes four times (each 30 milliliters), dry, obtain fluidity, uniform particle size distribution, spherical powdery solid procatalyst, in the solid procatalyst The mass percent content of Ti is 3.9%.

[0050] After a 2-liter stainless steel autoclave was fully replaced with nitrogen, 20 mg of the main catalyst prepared above, 3.0 ml of a hexane solution of a...

Embodiment 3

[0052] In the reactor that has been fully replaced by nitrogen, add 1.0 g of spherical MgCl in sequence 2 Carrier, 25ml of decane, stirring at high speed, slowly drop into 20ml of titanium tetrachloride and 8 mmol of internal electron donor succinate at -10°C, keep the temperature for 1 hour, then raise the temperature to 90°C for 3 hours, Stop stirring, let stand, and filter; then add 40ml of heptane at -10°C, slowly drop in 35ml of titanium tetrachloride, keep this temperature for 1.5 hours, raise the temperature to 110°C for 2.5 hours, stop stirring, let stand, and filter , wash four times (each 30 milliliters) with the hexane of 60 ℃, dry, obtain good fluidity, uniform particle size distribution, spherical powdery solid procatalyst, the mass percent composition of Ti in the solid procatalyst is 3.6 %.

[0053] After a 2-liter stainless steel autoclave was fully replaced with nitrogen, 20 mg of the main catalyst prepared above, 3.0 ml of a hexane solution of a composite ex...

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Abstract

The invention discloses a propylene polymerization catalyst, a preparation method and application thereof. The catalyst comprises a main catalyst, a compound external electron donor and a cocatalyst, wherein the compound external electron donor comprises an external electron donor I and an external electron donor II with the molar ratio of 1:(0.01-100); the general formula of the external electron donor I is R1nSi(OR2)4-n or R3R4Si(OR5)2, and the general formula of the external electron donor II is (R6O)(R7O)Si(R8O)(R9O). The invention also discloses a preparation method of the main catalyst in the catalyst and the application thereof in propylene polymerization reaction and copolymerization reaction of propylene and C3-C20 alpha-olefin. The catalyst provided by the invention is high in catalytic activity, the propylene as a product obtained from catalysis has the characteristics of high isotacticity, high melt index and high melting point; the preparation method of the catalyst is simple and environmental-friendly and is applicable to processes of bulk polymerization, slurry polymerization, gaseous polymerization or combined polymerization of the propylene.

Description

technical field [0001] The present invention relates to a catalyst for propylene polymerization, in particular to a catalyst for propylene homopolymerization or copolymerization and a preparation method of the catalyst, and to the application of the catalyst in propylene homopolymerization or propylene and alpha-olefin copolymerization. Background technique [0002] As an important product in high-performance resins, polypropylene is widely used in our daily life and production due to its excellent physical and chemical properties and low price. At present, the relatively mature industrial application is the supported Ziegler-Natta propylene polymerization catalytic system. Unlike the ethylene polymerization catalytic system, because polypropylene involves problems such as stereoregularity control, it is usually necessary to add a third component to the system. , External electron donors, which are mainly some organic compounds containing elements such as oxygen, nitrogen, p...

Claims

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Application Information

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IPC IPC(8): C08F10/06C08F4/646
Inventor 谭魁龙李志飞义建军黄启谷尹宝作王静程璐王仪森王科峰陈兴锋汪乃东
Owner PETROCHINA CO LTD
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