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A catalyst component used for olefin polymerization, and a preparing method and applications thereof

A technology of olefin polymerization and olefin polymer, applied in the field of polyolefin catalysts, can solve problems such as low efficiency, long pre-polymerization time, and decreased catalyst activity

Active Publication Date: 2014-09-10
RENQIU LIHE TECH LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1262693A discloses a prepolymerization catalyst used for propylene polymerization through ethylene prepolymerization, but the prepolymerization time is relatively long, the efficiency is low, and the catalyst activity has a certain degree of decline
However, this type of catalyst is pre-polymerized after obtaining the solid catalyst dry powder first, and the synthesis process of the catalyst component is relatively long; at the same time, it is difficult to control the mild reaction conditions, and the catalyst activity is excessively exerted during the pre-polymerization, resulting in the final catalyst particles. The problem of low activity

Method used

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  • A catalyst component used for olefin polymerization, and a preparing method and applications thereof
  • A catalyst component used for olefin polymerization, and a preparing method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1. Preparation of catalyst components:

[0101] In a 500ml stirred 5-neck flask fully replaced by nitrogen, add 10g of diethoxymagnesium and 80mL of toluene to prepare a suspension, then maintain 0°C and add 20mL of titanium tetrachloride dropwise, and then slowly raise the temperature to 80°C , add 3.6mL DNBP (dibutyl phthalate), then continue to heat up to 110°C for 2 hours at a constant temperature, then press filter the liquid, filter off the liquid, and wash the obtained solid three times with 100mL toluene at 90°C. Then, a mixed solution of 20 ml of titanium tetrachloride and 80 ml of toluene was added and stirred at 110° C. for 1 hour, and the liquid was filtered off. The obtained solid was washed 5 times with 100 mL of hexane at 60° C., and the liquid was filtered off. Add 300mL of n-hexane into the flask, add 4ml of 0.5mol / L triethylaluminum hexane solution, control the temperature at 5°C, and keep the temperature constant for 5 minutes; feed ethylene gas thro...

Embodiment 2

[0110] 1. Preparation of catalyst components:

[0111] In a 500ml stirred 5-neck flask fully replaced by nitrogen, add 10g of diethoxymagnesium and 80mL of toluene to prepare a suspension, then maintain 0°C and dropwise add 80mL of titanium tetrachloride, and slowly heat up to 80°C, add 3.6mL DIBP (diisobutyl phthalate), then continue to heat up to 120°C for 2 hours at a constant temperature, then press filter the liquid clean, filter off the liquid, and use 120mL of titanium tetrachloride to obtain the solid at 125 ℃ washing 3 times. The obtained solid was washed twice with 150 mL of hexane at 60°C and twice at room temperature. Add 300mL of n-hexane into the flask, add 8ml of 0.5mol / L triisobutylaluminum hexane solution, control the temperature at 18°C, and keep the temperature constant for 20 minutes; feed propylene gas through a mass flow meter, and control the feeding speed of propylene 20g / h, react for 60 minutes. The air intake was stopped, and nitrogen replacement w...

Embodiment 3

[0115] 1. Preparation of catalyst components:

[0116]In a 500ml stirred 5-neck flask fully replaced by nitrogen, add 10g of diethoxymagnesium and 80mL of toluene to prepare a suspension, then maintain 0°C and add 20mL of titanium tetrachloride dropwise, and then slowly raise the temperature to 110°C The temperature was kept constant for 2 hours, and then the liquid was press-filtered to remove the liquid, and the obtained solid was washed three times with 100 mL of toluene at 90°C. Then, a mixed solution of 20 ml of titanium tetrachloride and 80 ml of toluene was added and stirred at 110° C. for 1 hour, and the liquid was filtered off. The obtained solid was washed 5 times with 100 mL of hexane at 60° C., and the liquid was filtered off. Add 300mL of n-hexane into the flask, add 4ml of 0.5mol / L tri-n-hexylaluminum hexane solution, control the temperature at 5°C, and keep the temperature constant for 5 minutes; feed ethylene gas through a mass flow meter, and control the feed...

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Abstract

The invention provides a catalyst component for olefin polymerization. The catalyst component comprises Ti, Mg, halogen, at least one electron donor compound and 1-99% of an olefin polymer. The catalyst component is used for olefin polymerization and has characteristics of high activity, high accumulation density and low fine-powder content. The catalyst component is free of ageing influences during room-temperature storage. Polymer particles are not liable to break. The catalyst component is especially suitable for synthesis of in-reactor alloying polymers with high rubber contents.

Description

technical field [0001] The invention relates to a catalyst component for polyolefin, in particular to a catalyst component for olefin polymerization, its preparation method and its application in catalyzing olefin polymerization. The invention belongs to the field of polyolefin catalysts. Background technique [0002] High-performance catalysts for olefin polymerization in industrial applications are generally obtained by loading titanium compounds on active magnesium halides, and then using the solid catalyst, alkylaluminum and (or) electron donors together for olefin polymerization. Patents such as USP4,298,718 first disclosed the application of such compounds in polyolefin catalysts. [0003] For olefin polymerization catalysts, a very important requirement is that the content of polymer fine powder (particles with a diameter not greater than 75um) obtained by catalyst polymerization should be small enough. The reason is that too high fine powder content is the local ove...

Claims

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Application Information

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IPC IPC(8): C08F10/00C08F4/649C08F4/651C08F4/658
Inventor 王志武李树行代金松马庆利李华姝张军伟王敬禹
Owner RENQIU LIHE TECH LTD
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