Catalyst for preparing α-olefin from n-alcohol, preparation method and application thereof

A catalyst, a technology for catalytic reaction, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. and other problems, to achieve high α-olefin yield, high mechanical strength and thermal stability, and maintain the effect of high-efficiency reaction

Active Publication Date: 2022-06-21
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although in the prior art α-olefins can be prepared by the intramolecular dehydration reaction of n-alcohols, this reaction uses zirconia and alumina as catalysts, and the industrial production yield of α-olefins is low, which is not suitable for wide application.

Method used

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  • Catalyst for preparing α-olefin from n-alcohol, preparation method and application thereof
  • Catalyst for preparing α-olefin from n-alcohol, preparation method and application thereof
  • Catalyst for preparing α-olefin from n-alcohol, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Embodiment 1: the preparation of catalyst and Application in the preparation of 1-octene from n-octanol

[0081] Weigh 104.53g zirconium source Zr (NO 3 ) 4 ·5H 2 O dissolved in deionized water, Zr(NO 3 ) 4 ·5H 2 The mass ratio of O to deionized water is 1:25. After the solution is clear and transparent, 12.78 g of tetrabutyl titanate, the precursor of the modifier, is added dropwise. L of ammonia water is subjected to precipitation reaction, and the pH value of the reaction solution is controlled to be 9. After the reaction is completed, it is allowed to stand for 12 hours, and then filtered and washed to obtain a precipitated product. The precipitation product was extruded into strips, dried and calcined at 600 °C for 4 h to obtain the modifier as TiO 2 ZrO 2 catalyst, where TiO 2 with ZrO 2 The mass ratio is 10:100.

[0082] The catalyst prepared above was put into a tubular fixed-bed reactor, the inner diameter of the reactor was 10 mm, and the filling am...

Embodiment 2

[0085] Similar to Example 1, the difference is that in the preparation of the catalyst, the modifier precursor is 0.9557g of ammonium metatungstate, which is directly added to the solution containing the zirconium source, and the modifier is WO. 3 ZrO 2 catalyst, where WO 3 with ZrO 2 The mass ratio is 3:100. The reaction results are shown in Table 1.

Embodiment 3

[0087]Similar to Example 1, the difference is that in the preparation of the catalyst, the modifier precursor is 0.9 g of silica gel, which is directly added to the solution containing the zirconium source, and the modifier is SiO 2 ZrO 2 catalyst, where SiO 2 with ZrO 2 The mass ratio is 3:100. The reaction results are shown in Table 1.

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PUM

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Abstract

The invention discloses a catalyst for preparing α-olefins from n-alcohol, a preparation method and its application. The catalyst includes zirconium dioxide and a modifying agent, and the mass difference between the modifying agent and the zirconium dioxide is The ratio is 1:100-20:100, and the modifying agent is selected from one or more of titanium dioxide, silicon dioxide and tungsten trioxide. The provided catalyst for preparing alpha-olefins from n-alcohols obtained according to the preparation method of the present invention has a higher yield of alpha-olefins and a higher long-term reaction efficiency.

Description

technical field [0001] The invention belongs to the technical field of catalytic dehydration, and in particular relates to a catalyst for preparing alpha-olefin from n-alcohol, a preparation method and application thereof. Background technique [0002] Alpha-olefins are straight-chain olefins with carbon-carbon double bonds at the terminal positions, which can be used as raw materials for the synthesis of advanced lubricating oils and fuel additives, and as monomers for the synthesis of advanced surfactants, high-performance plastics and organic solvents. a very important petrochemical raw material. [0003] 1-Octene is a kind of α-olefin, which has extremely high commercial value as the third monomer of high-end polyolefins. Although 1-octene can be separated from related petroleum fractions, because petroleum fractions The composition is complex, and it is difficult to obtain high-purity 1-octene. [0004] The natural fatty alcohol obtained from biomass is a green and re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J21/08B01J23/30C07C1/24C07C11/02
CPCB01J21/066B01J21/08B01J23/30C07C1/24C07C11/02
Inventor 姚志龙李冬冬孙培永张胜红
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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