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Load type Ziegler-Natta catalyst, preparation method and application

A catalyst and supported technology, applied in the field of catalyst and catalyst preparation, can solve the problems of low catalyst activity and easy adhesion to the container wall, etc., and achieve the effects of high catalyst activity, good particle shape and simple preparation method.

Active Publication Date: 2016-12-07
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst activity is low, and the main catalyst particles are easy to adhere to the container wall

Method used

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  • Load type Ziegler-Natta catalyst, preparation method and application
  • Load type Ziegler-Natta catalyst, preparation method and application
  • Load type Ziegler-Natta catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In a reactor fully replaced by nitrogen, add 1g of magnesium dichloride, 20ml of n-decane, 6ml of isooctyl alcohol, and 0.1ml of ethanol, stir and heat up to 110°C, react for 2h, and the solid dissolves completely to form a solution. Cool down to 50°C, add 0.3 g of sorbic acid and 0.4 g of sodium sulfate in sequence, and react for 2 hours. Lower the temperature of the system to -15°C, add 25ml of titanium tetrachloride dropwise, react for 1h, then raise the temperature to 100°C for 2h. Stirring was stopped, allowed to stand, layered, filtered, washed with hexane four times (30ml each time); vacuum-dried at 70°C for 2 hours to obtain a spherical powdery solid procatalyst with good fluidity and uniform particle size distribution.

Embodiment 2

[0043] In the reactor fully replaced by nitrogen, add 1g of magnesium dichloride, add 20ml of n-decane, add 8ml of isooctyl alcohol, stir and heat up to 100°C, react for 3h, and the solid is completely dissolved to form a solution. Cool down to 60°C, add 0.1 g of citric acid, 0.2 g of tributyl phosphate, and 0.3 g of sodium sulfate, and react for 1.5 h. Lower the temperature of the system to -10°C, add 30ml of titanium tetrachloride dropwise, react for 2h, then raise the temperature to 100°C for 2h. Stirring was stopped, allowed to stand, layered, filtered, washed 3 times with hexane (45ml each time); vacuum-dried at 60°C for 3 hours to obtain a spherical powdery solid procatalyst with good fluidity and uniform particle size distribution.

Embodiment 3

[0045]In the reactor fully replaced by nitrogen, add 1g of magnesium dichloride, add 20ml of n-decane, add 10ml of isooctyl alcohol, stir and heat up to 120°C, react for 2h, and the solid is completely dissolved to form a solution. Cool down to 40°C, add 0.1 g of citric acid and 0.3 g of magnesium sulfate in sequence, and react for 2 hours. The temperature of the system was lowered to 0°C, 30ml of titanium tetrachloride was added dropwise, reacted for 2h, and then heated to 90°C for 2h. Stirring was stopped, allowed to stand, layered, filtered, washed with hexane four times (30ml each time); vacuum-dried at 70°C for 3 hours to obtain a spherical powdery solid procatalyst with good fluidity and uniform particle size distribution.

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PUM

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Abstract

The invention provides a load type Ziegler-Natta catalyst and a preparation method. The main catalyst load type Ziegler-Natta catalyst is prepared from a carrier, transition metallic halide, C2-20 alcohol, organic acid and an ionic compound with the molar ratio of 1:(3-50):(0.01-20):(0.01-20):(0.01-20). The catalyst is excellent in hydrogen regulation performance, high in load amount and high in activity, and main catalyst particles and polyolefin particles are not attached to a container wall. The polymer is good in particle morphology, high in stacking density and small in fine powder amount. The catalyst is applicable to slurry polymerization technology, ring pipe polymerization technology, gas phase polymerization technology or combination polymerization process. The preparation process of the main catalyst is simple, low in cost, low in equipment requirement, small in energy consumption and small in environmental pollution.

Description

technical field [0001] The invention belongs to the field of olefin coordination polymerization catalyst and olefin coordination polymerization, and specifically relates to a catalyst for olefin homopolymerization or copolymerization, a preparation method and application of the catalyst. Background technique [0002] Olefin polymerization catalysts are the core of polyolefin polymerization technology. From the perspective of the development of olefin polymerization catalysts, there are two main aspects: (1) the development of polyolefin resin catalysts that can prepare special or better performance, such as metallocene catalysts (2) For the production of general-purpose polyolefin resins, on the basis of further improving catalyst performance, simplify the catalyst preparation process, reduce catalyst costs, and develop environmentally friendly technologies to improve efficiency ,Increase competitiveness. Before the 1980s, the focus of polyethylene catalyst research was on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F4/02C08F4/642C08F110/02C08F210/02C08F210/14C08F210/06C08F210/08
CPCC08F110/02C08F210/02C08F210/06C08F210/14C08F210/08C08F4/02C08F4/6421
Inventor 黄启谷张润聪王帆南枫王静何磊杨万泰
Owner BEIJING UNIV OF CHEM TECH
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