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Ethylene oligomerization catalyst system and its preparation method and application

An ethylene oligomerization and catalyst technology, which is applied in the field of homogeneous zirconium catalyst system and its preparation, can solve the problems of clogging pipelines and affecting industrial production, and achieve the effects of avoiding the formation of high polymers, rational distribution and high yield.

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the aforementioned documents have improved the zirconium-based ethylene oligomerization catalysts, there is still room for improvement in terms of the yield of C6-C20 and the yield of α-olefins
[0005] In addition, zirconium-based ethylene oligomerization catalysts generally lead to the formation of high polymers—high polymers will block pipelines during the oligomerization process and seriously affect industrial production—the aforementioned literature does not mention this aspect

Method used

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  • Ethylene oligomerization catalyst system and its preparation method and application
  • Ethylene oligomerization catalyst system and its preparation method and application
  • Ethylene oligomerization catalyst system and its preparation method and application

Examples

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preparation example Construction

[0069] The present invention provides a preferred method for preparing the one main catalyst, comprising:

[0070] (1) in an inert solvent, the ZrX 4 The reaction with an alcohol, the solution obtained in step; and

[0071] (2) The step (1) was obtained with the formula SiCl n Rim 4-n Silicon compound, thereby to obtain said procatalyst step of;

[0072] Wherein, X is Cl, Br, or I, n is 2, 3 or 4, R is a hydrocarbon group.

[0073] In the present invention, the inert solvent means a solvent adversely influence the reaction on the catalytic performance of ethylene oligomerization catalyst and oligomerization of ethylene.

[0074] In the present invention, the inert solvent is preferably benzene, toluene, xylene, mesitylene, n-hexane or cyclohexane, and any mixtures thereof between.

[0075] The main method of preparing the catalyst, the reaction temperature in step (1) is from 60 ℃ ~ 120 ℃, preferably 60 ℃ ~ 80 ℃.

[0076] The main method of preparing the catalyst, the reaction tem...

Embodiment 1

[0099] This example illustrates the preparation of a catalyst system of the present invention, the oligomerization of ethylene.

[0100] The 2.33g (10mmol) ZrCl 4 Placed in three-necked flask, toluene was added 30mL, was heated to 70 ℃, stirred for 1 hour, 30mmol of n-butanol, 85 deg.] C to reflux for 4 hours, cooled to 0 deg.] C, was added 3.82 mL (30mmol) of trimethylchlorosilane reaction 4 hours, 5mmol dibenzoylmethane, and then toluene was added to a solution of 50mL, oligomerization catalyst solution to give a zirconium concentration of 0.2 mol / liter A.

Embodiment 2

[0102] This example illustrates the preparation of a catalyst system of the present invention, the oligomerization of ethylene.

[0103] Using the same method of Example 1, except that only: an amount of 2 mmol of dibenzoylmethane, to prepare a catalyst solution B.

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Abstract

The present invention relates to an ethylene oligomerization catalyst system and its preparation method and application. The catalyst system comprises: ZrX 4 , alcohol and the general formula is SiCl n R 4‑n The main catalyst prepared by the reaction of the silicon compound, β-diketone and aluminum alkyl co-catalyst. The catalyst system of the invention can improve the product distribution of oligomerization products and increase the yield of α-olefin.

Description

Technical field [0001] The present invention relates to an ethylene oligomerization catalyst system and its preparation method and application. More specifically, the present invention relates to a zirconium homogeneous linear ethylene α- olefin oligomerization catalyst system and its preparation method and application. Background technique [0002] The customary industrial end above C4 alkenyl (double bond at the molecular chain end) is called α- olefins. As industrial products, the α- olefins, the carbon number distribution of a wide range of (C4 ~ C40), there is widely used a carbon number in the range of linear α- olefins of C6 ~ C20. [0003] Olefin oligomerization is the main way the production of α- olefins, processes are more mature Gulf method, a method and Ethyl SHOP process, this process uses three catalysts are alkyl aluminum or nickel compound, the reaction conditions are harsh, the pressure generally dozens MPa. Compared with these three processes, when the zirconiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38C07C2/22C07C11/08C07C11/107C07C11/02
CPCC07C2/22B01J31/38C07C2531/38B01J2231/20C07C11/08C07C11/107C07C11/02
Inventor 宗明生荣峻峰林伟国
Owner CHINA PETROLEUM & CHEM CORP
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