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Dehydrogenation catalyst taking Sn-containing alumina as carrier and preparation method thereof

A technology of alumina carrier and dehydrogenation catalyst, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. sexual issues

Active Publication Date: 2010-12-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anti-coking ability and stability of the catalyst are still not improved

Method used

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  • Dehydrogenation catalyst taking Sn-containing alumina as carrier and preparation method thereof
  • Dehydrogenation catalyst taking Sn-containing alumina as carrier and preparation method thereof
  • Dehydrogenation catalyst taking Sn-containing alumina as carrier and preparation method thereof

Examples

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Effect test

example 1

[0028] Preparation of Sn-containing alumina support. After mixing 1.13M aluminum trichloride solution and 0.01M tin tetrachloride solution, add ammonia water with a weight concentration of 7%, mix evenly in a neutralization tank at 60-80°C, and control the pH value to 7.0-9.0, After filtering, washing with water, and acidifying, pressurize the oily ammonia column to form balls, age, and roast at 650°C for 4 hours to obtain alumina pellets containing 1.0wt% Sn.

[0029] Put alumina pellets containing 1.0wt% Sn in a tubular reactor, pass through ethylene gas, and pyrolyze at 600°C. After 6 hours, a carrier containing 8% carbon fiber is obtained.

[0030] The modified alumina carrier loaded with carbon nanofibers was impregnated with chloroplatinic acid solution for 12 hours, then evaporated to dryness at 70°C, dried at 120°C for 5 hours, and then calcined at 500°C for 4 hours in an inert atmosphere. Activated in medium for 4h. Then at 70 °C with KNO 3 The catalyst was impregn...

example 2

[0034]Preparation of Sn-containing alumina support. Mix 1.15M aluminum trichloride solution and 0.02M tin tetrachloride solution, add ammonia water with a weight concentration of 10%, mix evenly in a neutralization tank at 60-80°C, control the pH value to 7.0-9.0, filter , washed with water, and acidified, pressurized into spheres in an oily ammonia column, aged, and roasted at 750°C for 4 hours to obtain alumina pellets containing 2.0wt% Sn.

[0035] Alumina pellets containing 2.0wt% Sn were placed in a tubular reactor, fed with ethylene gas, and pyrolyzed at 700°C. After 8 hours, a carrier containing 12% carbon fiber was obtained.

[0036] The modified alumina carrier loaded with carbon nanofibers was co-impregnated with chloroplatinic acid solution for 12 hours, then evaporated to dryness at 70°C, dried at 120°C for 5 hours, and then calcined at 500°C for 4 hours in an inert atmosphere. Activated in nitrogen for 4h. Then at 70°C with KNO 3 The catalyst was impregnated in...

example 3

[0040] Preparation of Sn-containing alumina support. After mixing 1.0M aluminum trichloride solution and 0.01M tin tetrachloride solution, add ammonia water with a weight concentration of 11%, mix evenly in a neutralization tank at 60-80°C, and control the pH value to 7.0-9.0, After filtering, washing with water, and acidifying, pressurize the oily ammonia column to form balls, age, and bake at 700°C for 4 hours to obtain alumina pellets containing 0.5wt% Sn.

[0041] Alumina pellets containing 0.5wt% Sn were placed in a tubular reactor, fed with ethylene gas, and pyrolyzed at 700°C. After 8 hours, a carrier containing 12% carbon fiber was obtained.

[0042] The modified alumina carrier loaded with carbon nanofibers was calcined at 600°C for 3h under an inert atmosphere, co-impregnated with the chloroplatinic acid solution for 6h, rotated to dryness at 70°C, dried at 120°C for 5h, and then Calcined at 500°C for 4 hours in an inert atmosphere, and activated for 4 hours in nitr...

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Abstract

The invention discloses a dehydrogenation catalyst taking Sn-containing alumina as a carrier and a preparation method thereof. The dehydrogenation catalyst takes the Sn-containing alumina as the carrier, nano fibers are carried on the pore surface of the carrier, and dehydrogenation active metal ingredients are carried by an immersion method. The preparation method for the catalyst comprises the following steps of: introducing the carrier to Sn when the alumina is gelled, carrying the carbon nano fibers to the Sn-containing alumina carrier in situ by ethylene cracking, then immersing the dehydrogenation active ingredients, and performing thermal treatment and water vapor treatment to obtain the final dehydrogenation catalyst. When the catalyst is used for a hydrocarbon dehydrogenation reaction process, in particular a propane dehydrogenation process, the catalyst has the advantages of high activity, high selectivity and the like, and particularly greatly improves the stability.

Description

technical field [0001] The invention relates to a dehydrogenation catalyst and a preparation method thereof, in particular to a catalyst for preparing propylene from propane dehydrogenation with Sn-containing alumina as a carrier and a preparation method thereof. Background technique [0002] Since the beginning of the new century, the demand for petrochemical raw materials and petrochemical products in the world will continue to grow, and the demand for propylene as a basic petrochemical raw material will continue to grow. However, the production capacity of conventional steam cracking and FCC technology cannot meet the rapidly growing demand for propylene, causing the market to emerge a global shortage. Moreover, with the increasing scarcity of petroleum resources, the production of propylene has changed from purely relying on petroleum as a raw material to diversifying the technical route of raw material sources, especially the technical route of producing olefins from lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/42B01J23/44B01J37/02B01J37/08C07C11/06C07C5/333
CPCY02P20/52
Inventor 张海娟李江红金亮张喜文
Owner CHINA PETROLEUM & CHEM CORP
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