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A catalyst using aluminum oxide modified mesonore molecular sieve as a carrier for dehydrogenation producing propylene

A technology for mesoporous molecular sieves and propane dehydrogenation, applied in molecular sieve catalysts, physical/chemical process catalysts, organic chemistry, etc.

Inactive Publication Date: 2009-03-04
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the platinum-tin two-component alkane dehydrogenation catalyst supported by alumina-modified mesoporous molecular sieve material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The pure silicon MCM-41 mesoporous material was prepared by hydrothermal synthesis method. The Na in the roasted MCM-41 was decomposed by ion exchange method + All exchanged for H + . After drying and roasting, immerse in aluminum nitrate solution, stir at room temperature for 1 hour, stir in an oil bath at 60°C and evacuate to dryness, dry at 100°C overnight, and roast at 550°C for 10 hours. The weight percent content of aluminum oxide in the obtained sample is: 9.1%. Press the carrier containing alumina into tablets, sieve (20-40 mesh), impregnate in chloroplatinic acid and SnCl 4 The mixed solution was evacuated to dryness. Dry at 120°C for 3 hours, roast in air at 500°C for 4 hours, and then dechlorinate with water vapor at 500°C for 4 hours. The catalyst composition is: Pt 0.4%, Sn 0.59%. The prepared catalyst was subjected to H 2 After pre-reduction, it is used to test the performance of propane dehydrogenation reaction. The reaction temperature is 590°C, ...

Embodiment 2

[0012] The pure silicon MCM-41 mesoporous material was prepared by hydrothermal synthesis method. The Na in the roasted MCM-41 was decomposed by ion exchange method + All exchanged for H + . After drying and roasting, immerse in aluminum nitrate solution, stir at room temperature for 1 hour, stir in an oil bath at 60°C and evacuate to dryness, dry at 100°C overnight, and roast at 550°C for 10 hours. The weight percent content of aluminum oxide in the obtained sample was 23.1%. Press the carrier containing alumina into tablets, sieve (20-40 mesh), impregnate in chloroplatinic acid and SnCl 4 The mixed solution was evacuated to dryness. Dry at 120°C for 3 hours, roast in air at 500°C for 4 hours, and then dechlorinate with water vapor at 500°C for 4 hours. The catalyst composition is: Pt 0.4%, Sn 0.59%. The prepared catalyst was subjected to H 2 After pre-reduction, it is used to test the performance of propane dehydrogenation reaction. The reaction temperature is 590°C,...

Embodiment 3

[0014] The pure silicon SBA-15 mesoporous material was prepared by hydrothermal synthesis method. The roasted SBA-15 was immersed in aluminum nitrate solution, stirred at room temperature for 1 h, stirred in an oil bath at 60°C and evacuated to dryness, dried overnight at 100°C, and calcined at 550°C for 10 h. The weight percent content of aluminum oxide in the obtained sample was 23.1%. Press the carrier containing alumina into tablets, sieve (20-40 mesh), impregnate in chloroplatinic acid and SnCl 4 The mixed solution was evacuated to dryness. Dry at 120°C for 3 hours, roast in air at 500°C for 4 hours, and then dechlorinate with water vapor at 500°C for 4 hours. The catalyst composition is: Pt 0.4%, Sn 0.59%. The prepared catalyst was subjected to H 2 After pre-reduction, it is used to test the performance of propane dehydrogenation reaction. The reaction temperature is 590°C, the pressure is 0.1MPa, and the mass space velocity of propane is 6h -1 , the hydrogen / propa...

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PUM

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Abstract

The invention relates to a catalyst to make the propene by dehydrogenation propane which takes the modifying alumina medium molecular sieve as the carrier. The catalyst takes the modifying medium molecular sieve by the Al2O3 as the carrier; the platinum and tin double metal catalyst has an alumina weight proportion of 5.0 to 30.0 percent. The active component of the catalyst is the platinum; the weight proportion of the platinum is 0.4 percent; and the weight proportion of the accessory ingredient Sn is 0.1 to 2.0 percent.

Description

technical field [0001] The invention relates to a catalyst for propane dehydrogenation to propylene. Background technique [0002] As an important organic chemical raw material, propylene is widely used in the production of acrylonitrile, butanol, octanol, propylene oxide, isopropanol, cumene, acrylic acid, carbonyl alcohol and Nonylphenol and other chemical products. Propylene mainly comes from by-products or co-productions such as naphtha cracking and refinery FCC processes. With the increasing demand for propylene, traditional propylene production cannot meet the growing demand for propylene in petrochemical production. Propane dehydrogenation technology and other specialized production The share of propylene produced by the propylene process will continue to increase. my country has abundant oil and natural gas resources, which are basically composed of 60% propane and 20% butane. The development of the process of producing low-carbon olefins from low-carbon alkanes wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/74C07C11/06C07C5/333
CPCY02P20/52
Inventor 范以宁黄丽华史立华许波连李静
Owner NANJING UNIV
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