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Catalyst components and catalysts for selective oligomerization of ethylene

A catalyst and selective technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, compounds of Group 5/15 elements of the periodic table, etc., can solve huge equipment investment and process routes complex and other issues, to achieve the effect of long catalyst life, simple synthesis and high activity

Active Publication Date: 2019-04-30
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To obtain high-purity 1-hexene and 1-octene needs to be separated by multi-column rectification, the process route is complicated and the investment in equipment is huge

Method used

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  • Catalyst components and catalysts for selective oligomerization of ethylene
  • Catalyst components and catalysts for selective oligomerization of ethylene
  • Catalyst components and catalysts for selective oligomerization of ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Preparation of N-diphenylphosphino-2,6-diisopropylanilino (diphenylphosphino) dimethylsilane (C 38 h 43 NP 2 Si)

[0028] (1) Preparation of diphenylphosphinolithium

[0029] in the N 2 Add dehydrated THF (200 mL) and diphenylphosphine (18.62 g, 0.1 mol) into a fully replaced stirred 500 mL reactor, stir well and cool to -80° C. with liquid nitrogen. Draw n-butyllithium hexane solution (41.6mL, 2.4mol / L) with a 100mL syringe, slowly add it dropwise to the above solution while stirring, keep stirring at -80°C for 1h, then rise to room temperature and continue stirring for 1 hour, and then vacuum The solvent was removed, n-hexane (100 mL) was added, stirred thoroughly and then filtered, and the obtained filtrate was vacuum-extracted at room temperature to obtain 18.82 g (0.098 mol, 98.6%) of the product.

[0030] (2) prepare diphenylphosphinodimethylsilyl chloride (C 14 h 16 ClPSi)

[0031] in N 2 In an atmosphere glove box, dimethyldichlorosilane (6.45g, 0.05...

Embodiment 2

[0041] With embodiment 1. The difference is that Ph 1 ~Ph 4 Both are dimethylphenyl. Obtain 50.2g of oligomerization product, catalyst activity is 3.04×10 6 g oligomer / mol Cr·h. The distribution of the oligomerization products is shown in Table 1.

Embodiment 3

[0043] With embodiment 1. The difference is that Ph 1 ~Ph 4 Both are naphthyl. Obtain 51.3g of oligomerization product, catalyst activity is 3.11×10 6 g oligomer / mol Cr·h. The distribution of the oligomerization products is shown in Table 1.

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Abstract

ThThe invention relates to a catalyst component for selective oligomerization of ethylene and a catalyst thereof. The catalyst component is a compound which accords with a general formula (I) or a compound which is formed by connection of two or more constitutional units which accord with the general formula (I) by groups or chemical bonds; the structure of the general formula (I) is as follows: n is an integer, 0<=n<=4; Ph1, Ph2, Ph3 and Ph4 are selected from phenyl, substituted phenyl and derivatives thereof; R1, R2 and R3 are selected from phenyl, chain alkyl, annular alkyl and derivatives thereof. The catalyst has high activity, and high selectivity for the target product 1-hexene+1-octene; and 1-betene and 1-C10<+> are few. The catalyst has the characteristics of simple synthesis, low cost, long life, and the like; the mass percentage of C6-C8 linear alpha-olefins in the product is higher than 90%, and the mass percentage of C8 linear alpha-olefins is higher than 60%.

Description

technical field [0001] The invention belongs to the field of olefin oligomerization catalysis, and relates to a catalyst for olefin selective oligomerization, which is a catalyst component and catalyst for olefin selective oligomerization, especially related to olefin selective trimerization and tetramerization, Preparation method, application. technical background [0002] Linear α-olefins are an important class of organic chemical raw materials, which are widely used in the production of polyethylene, surfactants, lubricating oils and oil additives. Among them, the light components (C 4 -C 8 Olefin) can be used as a comonomer to copolymerize with ethylene to produce high performance linear low density polyethylene. In particular, high-purity 1-hexene and 1-octene can significantly improve the abrasion resistance and other chemical and mechanical properties of linear low-density polyethylene. With the continuous development of the global economy, the demand for high-per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/24C07C11/107C07C11/02C07C2/22C07F9/50
CPCY02P20/52
Inventor 姜涛张乐陈延辉邵怀启黄永旺
Owner TIANJIN UNIV OF SCI & TECH