Polymer carrier Ziegler-Natta catalyst for olefin hydrocarbon polymerization and its preparation method

A technology of Natta catalyst and copolymer carrier, which is applied in the field of olefin polymerization catalysts, and can solve problems such as specific surface area, small pore volume, poor compatibility between polyvinyl chloride and polyethylene, and limited catalytic productivity

Inactive Publication Date: 2007-04-18
吉林市朋力科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US6413901, US6448348 announced a kind of Z-N catalyst that uses polyvinyl chloride as carrier, although catalytic activity has been greatly improved, its specific surface area, pore volume are small, limit the raising of catalytic productivity, and polyvinyl chloride and polyvinyl chloride The miscibility of ethylene is extremely poor, which has a certain adverse effect on the appearance quality of the product; US5290745 has announced a Z-N catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] Catalyst preparation

[0041] Preparation of poly(styrene-acrylic acid) copolymer carrier: add 60Kg of dioxane and 20Kg of styrene / acrylic acid into the reactor, the styrene / acrylic acid molar ratio is 80:20, and then add the reactant weight (20Kg) 1.5 %(Wt) Azobisisobutyronitrile / benzoyl peroxide mixed initiator. After the reaction vessel was exhausted with nitrogen, the temperature was raised to 95°C at a rate of 1°C / min. The temperature was stopped and circulating cooling water was introduced to cool the reaction vessel. The polymerization time was 4 hours. The polymer was introduced into another chamber filled with a large amount of hexane / water. In the container, the volume ratio of hexane and water is 1:2. Under vigorous stirring, the copolymer was resolved. The copolymer was vacuum dried at 60°C for 48 hours to obtain a poly(styrene-acrylic acid) copolymer. Measured the viscosity average molecular weight W of the copolymer η It is 38430.

[0042] P...

Example Embodiment

[0043] Example 2

[0044] Catalyst preparation

[0045] Preparation of poly(styrene-acrylic acid) copolymer carrier: add 80Kg of dioxane and 20Kg of styrene / acrylic acid into the reactor, the styrene / acrylic acid molar ratio is 70:30, and then add the reactant weight (20Kg) 3.0 %(Wt) azobisisobutyronitrile / benzoyl peroxide mixed initiator, heated to 95° C. for polymerization for 2 hours. The other steps and process conditions are the same as the preparation of the copolymer carrier in Example 1. Measured copolymer viscosity average molecular weight W η For 18300.

[0046] Preparation of poly(styrene-acrylic acid) polymer carrier catalyst: Take 500g of the styrene copolymer prepared above, 5L of THF, 180g of magnesium dichloride, and 68g of titanium trichloride. The other steps are the same as the preparation steps of the polymer supported catalyst in Example 1. The composition of the polymer-supported catalyst is Ti 1.97% (wt); Mg 4.02% (wt); THF 18.2% (wt), and the rest is a poly...

Example Embodiment

[0047] Example 3

[0048] Catalyst preparation

[0049] Preparation of poly(styrene-acrylic alcohol) copolymer carrier: add 60Kg of dioxane and 20Kg of styrene / acrylic alcohol into the reactor, the molar ratio of styrene / acrylic alcohol is 80:20, and then add the reactant weight ( 20Kg) 2.5% (Wt) azobisisobutyronitrile / benzoyl peroxide mixed initiator. The other steps and process conditions are the same as the preparation of the copolymer carrier in Example 1. Measure the viscosity average molecular weight W of the copolymer by the viscosity method η Is 31,000.

[0050] Preparation of poly(styrene-acrylic alcohol) copolymer carrier catalyst: Take 500g of the poly(styrene-acrylic alcohol) copolymer carrier prepared above, add it to 5L THF, add 170g magnesium dichloride, 60g titanium trichloride, and others The steps and process conditions are the same as the preparation steps of Example 1 polymer supported catalyst. The composition of the polymer-supported catalyst is Ti1.58% (wt);...

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Abstract

This invention relates to a Z-N catalyst that uses polymer as carrying agent is utilized for aethylenum homopolymerization/alpha- alkenes copolymerization and its preparation. The expression of this catalyst is P-S .Mgx MClY(nTHF),in the expression M is titanium or Vanadium; X=1-40,Y=5-96,n=5-10;P-S is benzene vinyl copolymer carrying agent containing Lewis base functional group-OH,-COOH,-COOR, -CONH2, ixo-equal molecular weight is 10000-40000.Its preparation: First stated copolymer carrying agent that contains Lewis base functional group is dissolved in polar solvent and agretopes with magnesic chloride, second generating emboliform catalyst by the method that it is resolved with chloride of metal titanium or Vanadium and THF by nonpolar solvent or drying spray. This catalyst has very high catalytic activity to aethylenum polymerization, Applied to gas and slurry polymerization process, its products don't have inorganic ash content contained in common inorganic carrying agent.

Description

technical field [0001] The invention belongs to the field of olefin polymerization catalysts, in particular to a polymer carrier Ziegler-Natta catalyst for ethylene homopolymerization or ethylene / α-olefin copolymerization and a preparation method. Background technique [0002] Ziegler-Natta (Zigeler-Natta) polyolefin catalysts are composed of chlorides of certain metals (titanium, vanadium, etc.) In the 1950s, it is still the main catalyst for olefin polymerization so far, and it occupies an important position both in the field of industrial applications and in the field of research and development. People continue to improve its catalytic productivity and performance, but for more than 50 years, the traditional preparation method is still used, that is, the active components of the catalyst are supported on a carrier with a moderate specific surface area and pore volume that is insoluble in solvents. These carriers include: inorganic substances such as ...

Claims

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Application Information

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IPC IPC(8): C08F10/02C08F4/643C08F2/34C08F4/02
Inventor 刘超曲雅焕
Owner 吉林市朋力科技开发有限公司
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