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Olefin polymerization catalyst containing organo magnesium compound, as well as preparation method and applications thereof

A technology of compound and organomagnesium, which is applied in the field of catalysts for the polymerization of polymer materials, can solve the problems of less by-products, high catalyst activity, and increase the cost of catalyst preparation, and achieve the effects of cost reduction, high catalyst activity, and simple preparation methods

Active Publication Date: 2014-09-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of this type of catalyst is simple, with few by-products, and the prepared catalyst has high activity, which is very suitable for the preparation of various polyethylene products by the ethylene slurry process, but the preparation cost of the catalyst is increased due to the need to use a large amount of chlorine-containing organoaluminum compounds

Method used

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  • Olefin polymerization catalyst containing organo magnesium compound, as well as preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a kind of procatalyst for ethylene polymerization, and it is prepared by the following steps:

[0032] (1) Weigh 4.5 grams of diethoxymagnesium, add 100 milliliters of toluene and 12.3 milliliters of 2-ethylhexanol, stir and dissolve at 100° C. until a transparent solution is formed;

[0033] (2), get 15 milliliters of titanium tetrachloride, dilute with 50 milliliters of hexanes to obtain titanium tetrachloride solution, then slowly add the solution obtained in step (1) dropwise in the titanium tetrachloride solution of -10 ℃, After the dropwise addition was completed, the temperature was slowly raised to 60°C, and the reaction was stirred for 4 hours to obtain a catalyst suspension;

[0034] (3), the temperature of the catalyst suspension is down to room temperature, let stand, settle, wash three times with hexane, the consumption of each washing hexane is 50 milliliters, after washing is finished, under the situation of bath temperature 65 ℃,...

Embodiment 2

[0037] This embodiment provides a kind of procatalyst for ethylene polymerization, and it is prepared by the following steps:

[0038] (1) Weigh 4.5 grams of diethoxymagnesium, add 100 milliliters of toluene and 12.3 milliliters of 2-ethylhexanol, stir and dissolve at 100° C. until a transparent solution is formed;

[0039] (2), take 15 milliliters of silicon tetrachloride, dilute with 50 milliliters of hexanes to obtain a silicon tetrachloride solution, then slowly add the solution obtained in step (1) dropwise into the silicon tetrachloride solution at -10°C, After the dropwise addition was completed, the temperature was slowly raised to 60°C, and the reaction was stirred for 4 hours to obtain a catalyst suspension;

[0040] (3), the temperature of the catalyst suspension is down to room temperature, let stand, settle, and wash three times with hexane, the consumption of each hexane is 50 milliliters; After washing is finished, add 100 milliliters of hexanes and 15 millilite...

Embodiment 3

[0043] This embodiment provides a kind of procatalyst that is used for ethylene polymerization, and its preparation method is that the dripping sequence of step (2) of embodiment 1 is adjusted, the hexane solution of the prepared titanium tetrachloride is added dropwise In magnesium oxide solution, other operations are with embodiment 1.

[0044] The evaluation conditions for the slurry polymerization of the catalyst are the same as in Example 1, and the polymerization results are shown in Table 1.

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Abstract

The invention relates to an olefin polymerization catalyst containing organo magnesium compound, as well as a preparation method and an application of the olefin polymerization catalyst containing organo magnesium compound. Raw material composition of the main catalyst used for ethylene polymerization comprises at least one organo magnesium compound, at least one alcohol compound and at least one chlorine-containing compound, wherein the composition of the organo magnesium compound is shown in general formula I: Mg(OR<1>)nCl2-n, in which R<1> is a C2-C20 alkyl and is a saturated or unsaturated straight chain, branched chain or cyclic chain, and n is more than or equal to 0 and less than or equal to 2; the composition of the alcohol compound is shown in general formula II: R<2>OH, in which R<2> is a C2-C20 alkyl and is a saturated or unsaturated straight chain, branched chain or cyclic chain; and the composition of the chlorine-containing compound is shown in general formula III: MClm, in which M is a IIIA, IVA and VA main group element or a transition metal element and m=2, 3 or 4. The catalyst prepared by the method provided by the invention has the advantages of simple preparation method, high catalyst activity, good hydrogen sensitivity and good particle morphology.

Description

technical field [0001] The invention relates to an olefin polymerization catalyst containing an organomagnesium compound, a preparation method and application thereof, and belongs to the field of catalysts for polymer material polymerization. Background technique [0002] Since the successful development of high-efficiency polyethylene catalysts in the 1970s, the world's polyethylene industry has undergone tremendous changes. Over the past 20 years, with the development of ethylene polymerization process, the catalysts matching the polymerization process have also made great progress. Among them, high-efficiency catalysts still occupy an important role in the field of polyethylene catalysts due to their excellent polymerization performance and mature application technology. status. After years of exploration and research, many high-efficiency Z-N catalysts have been prepared, such as the technical solutions disclosed in CN1158136A, CN1127760A, CN1129709A, CN1085569A, US4109...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/02C08F4/645C08F4/654C08F4/58
Inventor 高克京胡徐腾毛静朱百春袁苑赵旭涛义建军崔亮王仪森崔伟松王健史君
Owner PETROCHINA CO LTD