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Catalyst for propylene polymerization and its preparation method

A technology for propylene polymerization and catalyst is applied in the field of preparation of catalyst components, which can solve the problems of few catalyst patents and achieve the effect of simple process steps.

Active Publication Date: 2008-09-17
LIAONING DINGJIDE PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many patents for high-efficiency catalysts, there are very few patents for catalysts that produce different performances under one system

Method used

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  • Catalyst for propylene polymerization and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation of catalyst component involved in the present invention comprises following two parts:

[0014] Preparation of A complex:

[0015] In the glass reaction flask fully replaced by nitrogen, add 5g of anhydrous MgCl 2 And 40ml200# solvent naphtha and 24ml isooctyl alcohol. The stirring was started and the temperature was raised, and the temperature was maintained at 130° C. for 2 hours. Add 0.75ml of tetrabutyl titanate and 1g of phthalic anhydride into the reaction flask, react at this temperature for 2 hours to obtain a homogeneous complex solution, and cool to room temperature.

[0016] Titanation of B complex:

[0017] The homogeneous solution prepared by the above method was dropped into 200ml TiCl at -20°C within 30 minutes. 4 and 10ml of refined toluene in a glass reactor, kept under stirring for 0.5h. After 4 hours, the temperature was raised to 108°C. At this temperature, 1.5ml of diisobutyl phthalate was added, and the temperature was continue...

Embodiment 2

[0026] The preparation of A complex is the same as in Example 1.

[0027] Titanation of B complex:

[0028] The homogeneous solution prepared by the above method was dropped into 200ml TiCl at -20°C within 30 minutes. 4 and 20ml of refined 200# solvent oil mixture in a glass reactor, kept under stirring for 0.5h. After 4 hours, the temperature was raised to 108°C. At this temperature, 1.5ml of diisobutyl phthalate was added, and the temperature was continued to rise to 110°C for 2 hours. After the liquid was filtered out, 200ml of TiCl was added again. 4 Raise the temperature to 110°C again and react for 2 hours. After the reaction, filter off the liquid, wash once with refined toluene at 80°C, and then wash with less than 2ppm hexane until there are no free chloride ions in the filtrate. The remaining solid product was vacuum dried to obtain a solid catalyst component.

[0029] Polymerization test is the same as example 1.

Embodiment 3

[0031] The preparation of A complex is the same as in Example 1

[0032] Titanation of B complex:

[0033] The homogeneous solution prepared by the above method was dropped into -20°C containing 1.2ml TiCl within 30 minutes 4 and 80ml of refined 200# solvent oil mixture in a glass reactor, kept under stirring for 0.5h. Increase the stirring speed to 800 rpm, heat up to 108°C after 4 hours, add 1.5ml of diisobutyl phthalate at this temperature, continue to heat up to 110°C, react for 2 hours, filter out the liquid, and then add 200ml TiCl 4 Raise the temperature to 110°C again and react for 2 hours. After the reaction, filter off the liquid, wash once with refined toluene at 80°C, and then wash with less than 2ppm hexane until there are no free chloride ions in the filtrate. The remaining solid product was vacuum dried to obtain a solid catalyst component.

[0034]

[0035] Mg(OEt) 2 / Di+TiCl 4 →Mg(OEt)Cl+Di+Ti(OEt)Cl 3

[0036] Mg(OEt)Cl+Di+TiCl 4 →MgCl 2 ·Di+Ti(O...

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Abstract

The present invention relates to catalyst, and is especially one kind of catalyst for propylene polymerization and its preparation process. The catalyst materials include MgCl2, solvent oil, isooctanol, titanate, acid anhydride, TiCl4, diisobutyl phthalate, toluene and hexane in certain molar proportion. The preparation process of the catalyst includes the following steps: 1. adding anhydrous MgCl2, No. 200 solvent oil and isooctanol into reaction bottle; stirring and heating; and adding tetrabutyl titanate and phthalic anhydride to prepare homogeneous solution; and 2. dropping the solution into glass reactor holding mixture of TiCl4 and refined toluene and adding diisobutyl phthalate.

Description

technical field [0001] The invention relates to the field of a method for preparing a catalyst component, in particular to a method for preparing a catalyst component for propylene polymerization. Background technique [0002] At present, most of the catalyst components used in propylene polymerization are Ziegler-Natta type high-efficiency catalysts supported by magnesium chloride. Magnesium chloride reacts with an organic solvent to form a uniform solution, and then this solution is added dropwise to titanium tetrahalide or titanium halide is added to this solution to form a precipitate, which is treated with a polycarboxylic acid ester to load it on the solid precipitate, After washing with titanium tetrahalide and an inert diluent, the solid catalyst component is obtained. Such as Chinese patents CN85100997A and CN02148336.1 etc. When propylene is polymerized, under the action of a co-catalyst, an external electron donor must be added to obtain a high isotactic product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/06C08F4/16
Inventor 张立志张再明张立波张金弟
Owner LIAONING DINGJIDE PETROCHEM
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