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Molybdenum supported catalyst for 1-butylene disproportionation reaction and preparation method

A supported catalyst and disproportionation reaction technology, applied in physical/chemical process catalysts, molecular sieve catalysts, metathesis reaction hydrocarbon production, etc., can solve problems that do not involve mesoporous SBA-15 alumina coating or composite modification, and achieve Effect of high propylene molar yield and high reaction stability

Active Publication Date: 2014-09-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned publications, only mesoporous SBA-15 molecular sieve / silica or alumina is used as a catalyst carrier in olefin disproportionation reaction, and the application of mesoporous SBA-15 with alumina coating or composite modification is not involved.

Method used

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  • Molybdenum supported catalyst for 1-butylene disproportionation reaction and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The composite carrier and catalyst were prepared by steam-induced hydrolysis. The specific steps were: weigh 3.1515g of aluminum nitrate nonahydrate and dissolve it in 10g of deionized water and stir until completely dissolved, then add 1g of mesoporous SBA-15 molecular sieve, stirred at room temperature for 0.5h. Then stir and impregnate at 60°C until the solution is completely evaporated to dryness, and then dry at 100°C for 6h. Transfer the sample to a tetrafluoroethylene beaker, place the entire tetrafluoroethylene beaker into a high-pressure reactor with a tetrafluoroethylene liner, and add 20 mL of deionized water to the space between the tetrafluoroethylene beaker and the tetrafluoroethylene liner water, sealed, and treated at 100°C for 7h. The sample was taken out from the autoclave, dried in the air at room temperature for 6 h, calcined at 100°C for 10 h, and calcined at 500°C for 6 h to finally obtain the composite carrier Support-A. Weigh 2g of the prepared...

Embodiment 2

[0024] Ammonia vapor-induced hydrolysis was used to prepare composite supports and catalysts. The specific steps were: weigh 3.1515g of aluminum nitrate nonahydrate and dissolve it in 10g of deionized water and stir until completely dissolved, then add 1g of mesoporous SBA-15 molecular sieve, stirred at room temperature for 0.5h. Then stir and impregnate at 60°C until the solution is completely evaporated to dryness, and then dry at 100°C for 6h. Transfer the sample to a tetrafluoroethylene beaker, place the entire tetrafluoroethylene beaker into a high-pressure reactor with a tetrafluoroethylene liner, and add 14wt% ammonia to the space between the tetrafluoroethylene beaker and the tetrafluoroethylene liner Aqueous solution, sealed, treated at 100°C for 7h. The sample was taken out from the autoclave, dried in the air at room temperature for 6 h, calcined at 100°C for 10 h, and calcined at 500°C for 6 h to finally obtain the composite carrier Support-B. Weigh 2g of the pre...

Embodiment 3

[0026] The composite carrier and catalyst were prepared by the traditional impregnation method. The specific steps were: weigh 3.1515g of aluminum nitrate nonahydrate and dissolve it in 10g of deionized water and stir until completely dissolved, then add 1g of template-removing mesoporous SBA-15 to the solution Molecular sieves, stirred at room temperature for 0.5h. Then it was stirred and impregnated at 60°C until the solution was completely evaporated to dryness, dried at 100°C for 6 hours, and calcined at 500°C for 6 hours to finally obtain the composite carrier Support-C. Weigh 2g of the prepared composite carrier Support-C, add 20mL of ammonium molybdate solution with a mass concentration of 0.0110g / mL, soak at room temperature for 24h, dry at 100°C, roast at 600°C for 2h, and after cooling, the obtained Mo content is 6 wt% Cat-C catalyst.

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Abstract

The invention provides a molybdenum supported catalyst for 1-butylene disproportionation reaction and a preparation method; the catalyst comprises two parts, an active metal component and a composite carrier, wherein the composite carrier is a compound of a mesoporous SBA-15 molecular sieve and alumina, and the supported active metal component is an oxide of molybdenum; the preparation method of the catalyst comprises the following steps: firstly removing templates from a mesoporous SBA-15 molecular sieve, coating the mesoporous SBA-15 molecular sieve with an alumina precursor by methods of water vapor-induced hydrolysis, ammonia vapor-induced hydrolysis, and the like to prepare a composite carrier with different ratios; then performing isovolumetric impregnation of the composite carrier in a molybdenum element-containing solution to obtain a supporting amount of metal molybdenum of 1-30%, drying and roasting to obtain the molybdenum supported catalyst. The catalyst provided in the invention can be used in reactions for preparing propylene and pentene by 1-butylene disproportionation, can improve the conversion rate of 1-butylene, and prolong the service life of the catalyst.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis, and in particular relates to a molybdenum-loaded catalyst for 1-butene disproportionation reaction and a preparation method. Background technique [0002] Olefin disproportionation reaction is an effective carbon-carbon skeleton rearrangement reaction, which has been widely developed and applied in homogeneous and heterogeneous catalytic systems since its discovery, for example, 1-butene and 2-butene can be cross-disproportionated to generate Propylene and pentene can not only increase the utilization rate of C4-olefins, but also increase the output of propylene. Compared with ethylene and 2-butene cross-disproportionation, it is not necessary to use the same expensive ethylene as raw material. Among them, Re, Mo and W are the active components of supported disproportionation reaction catalysts which are widely used. In contrast, the activity of W-based catalysts is low and requires a high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035C07C11/06C07C11/10C07C6/04
CPCY02P20/52
Inventor 李秀杰张大洲徐龙伢刘盛林谢素娟朱向学
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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