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Catalyst active component, its preparation and catalyst containing it

A technology for active components and catalysts, which is applied in the field of catalysts using the active components, can solve problems such as the influence of decomposition degree on catalytic activity, the sensitivity of polymer form to hydrogen adjustment, easy decomposition, etc., so as to shorten the preparation period and simplify the preparation. , Easy to wash effect

Active Publication Date: 2007-04-04
BEIJING JINDINGKE CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the tetraalkoxysilane electron donor added in this patent has great benefits for maintaining the catalyst form and the form of the obtained polymer, it is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Put 4.76 grams (0.05mol) of MgCl 2 , 100 mL of decane and 31 mL of isooctyl alcohol (0.2 mol), heated to 130 ° C for 180 minutes, cooled to 50 ° C, added 15 mmol of dipropyldimethoxysilane electron donor at this temperature, and continued to react for 60 minutes. After cooling to room temperature. Slowly add 50 mL of TiCl dropwise over 90 minutes at 0°C 4 In the mixed solution, keep the temperature at 0°C for 60 minutes after the dropwise addition, then add 25mL chlorocyclohexane and slowly raise the temperature to 110°C for 120 minutes to react for 120 minutes to obtain a solid catalyst. After stopping stirring, a solid catalyst will be found Particles settle very quickly. After the reaction was finished, the solid catalyst was filtered out with heat. Wash with hexane, 40 mL each time, until the filtrate is basically colorless, and the free titanium content is less than 0.3 mg / mL. After drying, a solid catalyst is obtained.

Embodiment 2～16

[0052] Except for diisopropyldimethoxysilane, diisobutyldimethoxysilane, butyldimethoxysilane, cyclohexylmethyldimethoxysilane, cyclohexylisopropyldimethoxy Silane, Cyclopentylisobutyldimethoxysilane, Cyclopentylisopropyldimethoxysilane, Cyclopentylbutyldimethoxysilane, Dicyclopentyldimethoxysilane, Diphenyl Dimethoxysilane, phenyltrimethoxysilane, methyltrimethoxysilane, butyltrimethoxysilane, isobutyltrimethoxysilane, gamma-chloropropyltrimethoxysilane instead of dipropyl Except for dimethoxysilane, the solid catalyst component was prepared in the same manner as in Example 1.

Embodiment 17～49

[0054] The solid catalyst component was prepared in the same manner as in Example 1 except that the amount and composition of the electron donor used were shown in Table 1.

[0055] Example

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PUM

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Abstract

A catalyst active ingredient, its production and catalyst containing it are disclosed. The ingredient consists of magnesium 12.0-18.0 proportion, titanium 4.0-8.0 proportion, alkoxy 1.1-11.0 proportion, silicon 0.5-2.5 and halogen 55.0-75.0 proportion. The process is carried out by preparing magnesium alcoholate slurry, reacting it with electron, pre-carried titanium reacting and carried titanium reacting. It has higher catalytic activity and melt index, better physical mechanical and copolymer performances and hydrogen selectivity, and homogeneous grain distribution.

Description

technical field [0001] The present invention relates to a catalyst active component for ethylene polymerization or copolymerization, a preparation method thereof, and a catalyst using the active component. Background technique [0002] Ethylene polymerization usually requires a catalyst with high catalytic activity and long-term performance. At the same time, it also requires that the molecular weight and molecular weight distribution of the polymer can be controlled, as well as have a good shape, so as to stabilize the process and improve operating efficiency. At present, the Ziegler-Natta type polyethylene catalysts used in industry are all loaded high-efficiency catalysts, and the carriers used are generally magnesium chloride. At present, polyethylene catalysts not only require high activity, but more importantly, good copolymerization performance, good hydrogen adjustment sensitivity, and the obtained polyethylene must have a large bulk density, uniform particle size di...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/645
CPCC08F10/02Y02P20/52
Inventor 徐江
Owner BEIJING JINDINGKE CHEM TECH
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