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Supported catalyst as well as preparation method and application thereof

A supported catalyst and supported technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve blocked pipelines, high activity duration, long duration, Problems such as high temperature tolerance, to achieve the effect of reducing adhesion, reducing cost, and reducing the equivalent used

Pending Publication Date: 2022-07-29
ZHEJIANG SATELLITE PETRO CHEM CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] Aiming at the deficiencies in the prior art, the present invention provides a supported catalyst and its preparation method and application. The loading capacity of the transition metal complex of the catalyst is adjustable, and the loaded catalyst complex is easy to separate from the reaction system. It has high tolerance, high activity and long duration, and can also transform the filamentary polymer into powder in the oligomerization reaction, which is beneficial to solve the problem of the by-product PE polymer sticking and blocking the pipeline in the oligomerization reaction, making it It is more conducive to the long-term continuous operation of production equipment

Method used

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  • Supported catalyst as well as preparation method and application thereof
  • Supported catalyst as well as preparation method and application thereof
  • Supported catalyst as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0039] Preparation of silica-supported chromium complexes:

[0040] (1) Heat treatment of silica gel at 650 °C for 6 h under nitrogen protection, so that the hydroxyl groups on the surface of silica gel can be dehydrated to form isolated hydroxyl groups, reducing the concentration of hydroxyl groups;

[0041] (2) In an inert gas glove box, at room temperature, weigh 5 g of the heat-treated silica gel carrier, add it to a MAO solution (10 wt% toluene solution), soak for 2 hours, and filter;

[0042] (3) In an inert gas glove box, at room temperature, 5g of MAO-activated silica gel carrier was mixed with 0.025g of transition metal complex in a toluene solution, stirred for 2h, then filtered and then vacuum-dried to obtain the load of the present invention type metal catalyst, the structure of which is shown in formula II.

[0043] Catalyst configuration: 20 mL of a toluene solution of the supported metal complex represented by formula II was freshly prepared in a glove box, and...

Embodiment 2

[0050] Preparation of silica gel-supported chromium complex: the same as in Example 1.

[0051] Catalyst configuration: the same as in Example 1.

[0052] Ethylene oligomerization: the addition amount of the cocatalyst methylaluminoxane was reduced to 4000 μmol (10 wt% toluene solution), and other conditions were the same as those in Example 1. Using the internal standard method, the catalyst activity was calculated to be 10.5×10 6 g / (molCr·h), the composition of the product is recorded in Table 1, and the gas chromatographic analysis of the product is shown in the appendix figure 1 .

Embodiment 3

[0054] Preparation of silica gel-supported chromium complex: the same as in Example 1.

[0055] Catalyst configuration: the same as in Example 1.

[0056] Ethylene oligomerization: the addition amount of cocatalyst methylaluminoxane was reduced to 3000 μmol (10 wt% toluene solution), and other conditions were the same as those in Example 1. Using the internal standard method, the catalyst activity was calculated to be 7.6×10 6 g / (molCr·h), the product composition is recorded in Table 1.

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Abstract

The invention provides a supported catalyst as well as a preparation method and application thereof, and relates to the field of ethylene oligomerization catalysis. The catalyst is a supported metal complex, the supported metal complex is generated by reaction of methylaluminoxane activated silica gel and a transition metal complex, and the transition metal complex is obtained by coordination of a PCmN skeleton organic ligand and a transition metal compound. According to the invention, the defects in the prior art are overcome, the supported catalyst is easily separated from a reaction system, the use amount of a cocatalyst is small, the temperature tolerance is high, the duration of high activity is long, the activity of the catalyst is up to 18.6 * 10 < 6 > g / (molCr.h), and the total selectivity of 1-hexene and 1-octene exceeds 90%.

Description

technical field [0001] The invention relates to the field of ethylene oligomerization catalysis, in particular to a supported catalyst and its preparation method and application. Background technique [0002] Linear α-olefins are very important organic raw materials and chemical intermediates, and are widely used in the synthesis of copolymerized polyethylene, surfactants, advanced synthetic lubricants (polyα-olefins), plasticizers and other fine chemicals. [0003] Among them, 1-hexene and 1-octene are mainly used as comonomers for polyethylene, and 1-octene is also used as a raw material for polyalphaolefin (PAO). With the increasing demand of polyolefin elastomer (POE) and synthetic lubricating oil (poly-α-olefin), 1-hexene and 1-octene have become the main growth points of the α-olefin market, accounting for 30% of the total demand %above. At present, 1-hexene and 1-octene are mainly produced by ethylene oligomerization in industry. [0004] Domestically, there are fe...

Claims

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Application Information

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IPC IPC(8): B01J31/24C07C11/107C07C11/02C07C2/36
CPCB01J31/24C07C2/36B01J2231/20B01J2531/62B01J2531/847C07C11/02C07C11/107Y02P20/52
Inventor 刘睿杨卫东李昕张梦凡周树伟郑建伟
Owner ZHEJIANG SATELLITE PETRO CHEM CO LTD
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