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Mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and preparing method and application thereof

A mesoporous molecular sieve and catalytic dehydrogenation technology, applied in the field of mesoporous molecular sieve catalyst and its preparation, can solve the problems of limited extension of catalyst regeneration period, high investment and operation cost, etc. stable effect

Active Publication Date: 2016-09-07
QINGDAO SHENFEI CHEM TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prolongation of the catalyst regeneration cycle is still limited. In addition, high investment and operating costs are still unavoidable for the use of Pt-based catalysts.

Method used

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  • Mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and preparing method and application thereof
  • Mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and preparing method and application thereof
  • Mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and preparing method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0022] At room temperature, 6g of dodecylamine (DDA) was added to 41.04g of ethanol (EtOH), stirred to dissolve it completely, and then 58.32g of water (H 2 O) continue to stir until clear solution is obtained; Weigh 0.57g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) Dissolve in 8.72g of ethanol, mix with 25g of tetraethyl orthosilicate (TEOS) after complete dissolution; add the mixed solution dropwise into the solution consisting of ethanol, water and dodecylamine. After continuing to stir for 24 hours, filter with suction, wash, dry at 120°C for 3 hours, and roast at 550°C for 5 hours. Before the reaction, it was reduced in a hydrogen flow at 600°C for 1 hour. The catalyst evaluation results showed that the conversion rate of propane was 39.88wt%, the yield of propylene was 34.16wt%, and the selectivity of propylene was 85.65wt%.

Embodiment 2

[0024] At room temperature, 5.56g of dodecylamine (DDA) was added to 45.6g of ethanol (EtOH), stirred to make it dissolve completely, and then 72g of water (H 2 O) continue to stir until clear solution is obtained; Weigh 1.64g nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) and 1.27g stannous chloride (SnCl 2 2H 2 O) Dissolve in 9.68g of ethanol, mix with 20.83g of tetraethyl orthosilicate (TEOS) after complete dissolution; add the mixed solution dropwise to the solution consisting of ethanol, water and dodecylamine. After continuing to stir for 48 hours, filter with suction, wash, dry at 100°C for 5 hours, and roast at 550°C for 3 hours. Before the reaction, it was reduced in a hydrogen flow at 550°C for 1 hour. The catalyst evaluation results showed that the conversion rate of propane was 36.43wt%, the yield of propylene was 32.47wt%, and the selectivity of propylene was 89.13wt%.

Embodiment 3

[0026] At room temperature, 4.67g of dodecylamine (DDA) was added in 34.2g of ethanol (EtOH), stirred to make it dissolve completely, then added 48.6g of water (H 2 O) continue to stir until clear solution is obtained; Weigh 0.55g zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) Dissolve in 7.26g of ethanol, mix with 18.75g of tetraethyl orthosilicate (TEOS) after complete dissolution; add the mixed solution dropwise to the solution consisting of ethanol, water and dodecylamine. After continuing to stir for 30h, filter with suction, wash, dry at 100°C for 12h, and roast at 600°C for 5h. Before the reaction, it was reduced in a hydrogen flow at 550°C for 2 hours. The catalyst evaluation results showed that the conversion rate of propane was 39.04wt%, the yield of propylene was 33.89wt%, and the selectivity of propylene was 86.80wt%.

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Abstract

The invention relates to a mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and a preparing method and application thereof. The mesoporous molecular sieve catalyst is characterized in that a metal active component M is introduced in situ in the process of synthesizing a mesoporous molecular sieve HMS, and the active component M is one or a mixture of metal or metallic oxide of Pt, Pd, Ru, Rh, Ni, Co, Fe, Sn and Zn. According to the mesoporous molecular sieve catalyst for alkane catalytic dehydrogenation and the preparing method thereof, the adopted active component is low in price and environmentally friendly, is anchored to a molecular sieve skeleton and highly dispersed, and is not prone to aggregation sintering in the reaction process, the alkane conversion per pass is high, and target product olefins are high in selectivity, stable in performance and long in regeneration period.

Description

technical field [0001] The invention relates to a catalyst in the field of petrochemical industry, in particular to a mesoporous molecular sieve catalyst for catalytic dehydrogenation of alkanes, a preparation method and application thereof. Background technique [0002] As an effective way to produce high value-added light olefins from low-value saturated alkanes, alkane dehydrogenation has already been applied industrially. The process is mainly divided into two categories, oxidative dehydrogenation and catalytic dehydrogenation. Although oxidative dehydrogenation is a strong exothermic reaction, which breaks the thermodynamic equilibrium limit, the problem of low selectivity of the target product olefins due to deep oxidation has always troubled researchers, and this point cannot make breakthroughs in a short period of time. Therefore, catalytic dehydrogenation is still the focus of scholars. The dehydrogenation technology for industrial application also adopts this app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035C07C11/06C07C5/333
CPCC07C5/3335C07C5/3337B01J29/035B01J29/0354B01J29/0356C07C2529/035B01J2229/183C07C11/06Y02P20/52
Inventor 王国玮李春义王浩人朱晴晴
Owner QINGDAO SHENFEI CHEM TECH CO LTD
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