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Phosphine-based modified metal catalyst and method for catalyzing ethylene oligomerization to produce 1-hexene-1-laurylene

A metal catalyst and ethylene oligomerization technology, which is applied in the direction of catalyst, bulk chemical production, carbon compound catalyst, etc., can solve the problem of single structure and few, and achieve high selectivity effect

Active Publication Date: 2018-12-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above results show that with the improvement of the catalyst, the mass fraction of 1-hexene to 1-dodecene is gradually increasing. However, there are not many reports on this type of catalyst, and the structure is relatively simple.

Method used

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  • Phosphine-based modified metal catalyst and method for catalyzing ethylene oligomerization to produce 1-hexene-1-laurylene
  • Phosphine-based modified metal catalyst and method for catalyzing ethylene oligomerization to produce 1-hexene-1-laurylene
  • Phosphine-based modified metal catalyst and method for catalyzing ethylene oligomerization to produce 1-hexene-1-laurylene

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Effect test

Embodiment 1

[0030] The method for producing 1-hexene to 1-dodecene by ethylene oligomerization is as follows, and the catalyst shown below is used to catalyze ethylene oligomerization.

[0031]

[0032] A 1 mmol / L catalyst toluene solution was freshly prepared in the glove box, and 10 mL of the catalyst solution was measured for use. Install the reaction kettle, preheat to 100°C, vacuum dry, cool to room temperature, replace with ethylene atmosphere, add 10mL catalyst toluene solution, 1mL methylaluminoxane toluene solution with a concentration of 1.5mol / L, 50mL toluene, Rapidly heated to 60°C, while raising the ethylene pressure to 4MPa, stirring at 500rpm, and maintaining for 60min. Rapidly cool the reaction system to 0°C, release the pressure, add 100mL of absolute ethanol and 5mL of 10% hydrochloric acid to quench, oscillate, stand still, add 5g of n-heptane internal standard, and use the organic phase liquid for gas chromatography analysis. The catalyst activity calculated by the...

Embodiment 2

[0034] The reaction temperature in Example 1 was adjusted from 60°C to 50°C, and other operating conditions were unchanged, and the catalyst activity calculated by the internal standard method was 4.6×10 6 g / mol Cr h, the product composition is recorded in Table 1.

Embodiment 3

[0036] The reaction temperature in Example 1 was adjusted from 60°C to 40°C, and other operating conditions were unchanged, and the catalyst activity calculated by the internal standard method was 6.5×10 6 g / mol Cr h, the product composition is recorded in Table 1.

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Abstract

A phosphine-based modified metal catalyst and a method for catalyzing ethylene oligomerization to produce 1-hexene-1-laurylene relate to the metal catalyst. The phosphine-based modified metal catalystadopts PC3NP as the main framework and has a chemical formula of [R1R2PCH2CH2CH2N(R5)PR3R4]MXn. The phosphine-based modified metal catalyst is used for preparation of the 1-hexene-1-laurylene by ethylene oligomerization. The phosphine-based metal catalyst is subjected to the ethylene oligomerization in an organic solvent to obtain linear alpha-olefin in even carbon number of 1-hexene-1-laurylene.The phosphine-based modified metal catalyst can synthesize 1-hexene-1- laurylene with high selectivity, and the mass fraction of the linear alpha-olefin accounts for up to 76%.

Description

technical field [0001] The invention relates to a metal catalyst, in particular to a phosphine-modified metal catalyst and a method for producing 1-hexene-1-dodecene by catalyzing ethylene oligomerization. Background technique [0002] In the field of α-olefin applications, 1-hexene to 1-dodecene occupies about 45% of the market, with a large demand and high added value. These α-olefins can be used as raw materials for comonomers to produce high-quality polyolefin plastomers and elastomers; used as raw materials for oligomerized monomers to produce basic synthetic oils; used as raw materials for hydroformylation to prepare medium and long-chain alcohols, Acids and esters; used as raw materials for epoxidation to produce medium and long-chain diols; also used as organic solvents, etc. At present, α-olefins in the market are mainly produced by ethylene oligomerization catalytic method. This method is more efficient than traditional wax cracking, alkane catalytic cracking, alk...

Claims

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Application Information

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IPC IPC(8): B01J31/24C07C2/32C07C11/02C07C11/107
CPCB01J31/2495C07C2/32C07C2531/24C07C11/02C07C11/107Y02P20/52
Inventor 朱红平刘睿陈志康
Owner XIAMEN UNIV
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