Catalyst for preparing propylene through propane catalytic dehydrogenation and preparation method thereof

A catalytic dehydrogenation and catalyst technology, which is applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of not yet established propane dehydrogenation production units, etc., and achieve good industrial development and application prospects, propylene selectivity Good and high catalytic activity

Inactive Publication Date: 2012-03-28
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although my country has also carried out dehydrogenation research on low-carbon alkanes such as propane and butane, but has not yet established a propane dehydrogenation production device

Method used

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  • Catalyst for preparing propylene through propane catalytic dehydrogenation and preparation method thereof
  • Catalyst for preparing propylene through propane catalytic dehydrogenation and preparation method thereof
  • Catalyst for preparing propylene through propane catalytic dehydrogenation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a catalyst for propane catalytic dehydrogenation to prepare propylene, which is prepared by an equal-volume continuous impregnation method, and the steps are as follows:

[0026] 1) Weigh 3.0g of self-made powder MCM-41 carrier and bake at 550°C for 4h;

[0027] 2) Use SnCl with a concentration of 0.0168mol / L 2 Immerse the MCM-41 carrier roasted in step 1) in 9.0ml of ethanol solution for 12h, then remove the solvent with a rotary evaporator at 60°C and -0.08Mp, dry at 120°C for 12h, and roast at 550°C for 4h;

[0028] 3) Then use H with a concentration of 0.0068mol / L 2 PtCl 6 Immerse the sample treated in step 2) in 9.0ml of aqueous solution for 12h, remove the solvent with a rotary evaporator at 60°C and -0.08Mp, dry at 120°C for 12h, and calcinate at 550°C for 4h to finally obtain Catalyst A.

[0029] Catalyst A component is: Pt-Sn / MCM-41, catalytic reaction temperature is 550-620°C, pressure is 0.1Mp, reaction gas hourly space velocity (GSH...

Embodiment 2

[0031] A method for preparing a catalyst for propane catalytic dehydrogenation to prepare propylene, which is prepared by an equal-volume continuous impregnation method, and the steps are as follows:

[0032] 1) Weigh 3.0g of self-made powder MCM-41 carrier and bake at 550°C for 4h;

[0033] 2) Ce(NO 3 ) 3 Immerse 9.0ml of aqueous solution for 12h, then remove the solvent with a rotary evaporator at 60°C and -0.08Mp, dry at 120°C for 12h, and roast at 550°C for 4h;

[0034] 3) Immerse the sample after step 2) with 0.0168mol / L SnCl 2 9.0ml of ethanol solution, the preparation process is exactly the same as step 2);

[0035] 4) Finally, the impregnation concentration of the sample after step 3) is 0.0068mol / L H 2 PtCl 6 Aqueous solution 9.0ml, its preparation process and conditions are the same as step 2), catalyst B can be prepared.

[0036] The component of catalyst B is: Pt-Sn-Ce / MCM-41, and the detection condition of catalytic application is identical with embodiment 1...

Embodiment 3

[0038] A method for preparing a catalyst for propane catalytic dehydrogenation to prepare propylene, which is prepared by an equal-volume continuous impregnation method, and the steps are as follows:

[0039] 1) Same as step 1) of Example 2;

[0040] 2) Same as step 2) of Example 2;

[0041] 3) Same as step 3) of embodiment 2;

[0042]4) The sample treated in step 3) was treated with Ca(NO 3 ) 2 Soak 9.0ml of the solution for 12h, then remove the solvent with a rotary evaporator at 60°C and -0.08Mp, dry at 120°C for 12h, and roast at 550°C for 4h;

[0043] 5) Immerse the above treated sample in 0.0068mol / L H 2 PtCl 6 Add 9.0ml of aqueous solution, then remove the solvent with a rotary evaporator at 60°C and -0.08Mp, dry at 120°C for 12 hours, and calcinate at 550°C for 4 hours to prepare catalyst C.

[0044] The component of catalyst C is: Pt-Sn-Ce-Ca / MCM-41, and the detection condition of catalysis application is identical with embodiment 1, and gas product after reacti...

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Abstract

The invention relates to a catalyst for preparing propylene through propane catalytic dehydrogenation, which is a load type platinum-based catalyst and is characterized in that home-made mesoporous molecular sieves MCM-41 are used as carriers, metal Pt is used as an active ingredient, and metals Sn, Sn-Ce or Sn-Ce-Ca are used as auxiliary agents. In a preparation method, an isovolumetric continuous immersion method is adopted for preparation. The catalyst and the preparation method have the advantages that the isovolumetric continuous immersion method is adopted for preparing multi-component catalysts, wherein the content of any one component is easy to control, the prepared catalyst has higher specific surface area (700 to 900m<2> / g) and has high catalytic activity, the propane conversion rate is high, the propylene selectivity is good, the one-path stability is good, in addition, the service life is longer, the preparation method of the catalyst carriers is simple and feasible, the economic benefit is obvious, and good industrial development and application prospects are realized.

Description

technical field [0001] The invention relates to a catalytic technology for propane dehydrogenation to prepare propylene, in particular to a catalyst for propane catalytic dehydrogenation to prepare propylene and a preparation method thereof. Background technique [0002] Propylene is a basic organic chemical raw material, and its economic value is self-evident. The use involves many aspects. In addition to being used for the manufacture of polypropylene, it is also widely used as the main raw material for the production of acrylonitrile, butanol, octanol, propylene oxide, cumene and nonylphenol. In addition, the oligomerization of propylene It is the main ingredient to increase the octane number of gasoline. At present, the supply of propylene mainly comes from the by-products of naphtha cracking to ethylene and petroleum catalytic cracking processes. With the development of the petrochemical industry, the demand for propylene is increasing, and the supply is in short supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/74C07C11/06C07C5/333
CPCY02P20/52
Inventor 吴世华郭先芝杨太利王淑荣张守民
Owner NANKAI UNIV
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