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

An alumina carrier, dehydrogenation catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of not improving catalyst anti-coking ability and stability issues of sex

Active Publication Date: 2012-05-30
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

Examples

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Effect test

example 1

[0028] Preparation of Sn-containing alumina supports. 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 the neutralization tank at 60-80°C, and control the pH value to 7.0-9.0, After filtration, water washing and acidification, the oil-ammonia column was pressurized into spheres, and after aging, calcined at 650° C. for 4 hours to obtain alumina spheres containing 1.0 wt % of Sn.

[0029] The alumina pellets containing 1.0 wt% Sn were placed in a tubular reactor, ethylene gas was introduced, and pyrolyzed at a high temperature of 600° C. After 6 hours, a carrier with a carbon fiber content of 8% was obtained.

[0030] The modified alumina carrier loaded with carbon nanofibers was immersed in a chloroplatinic acid solution for 12 h, rotary evaporated to dryness at 70 °C, dried at 120 °C for 5 h, and then calcined at 500 °C for 4 h in an inert atmosphere, under nitrogen contai...

example 2

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

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

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

example 3

[0040] Preparation of Sn-containing alumina supports. 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 filtration, water washing and acidification, the oil-ammonia column was pressurized into spheres, and after aging, calcined at 700° C. for 4 hours to obtain alumina spheres containing 0.5wt% of Sn.

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

[0042] The modified alumina carrier loaded with carbon nanofibers was calcined at 600 °C for 3 h in an inert atmosphere, the calcined carrier was co-impregnated with chloroplatinic acid solution for 6 h, rotary evaporated to dryness at 70 °C, dried at 120 °C for 5 h, and then It...

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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 by dehydrogenation of propane with Sn-containing alumina as a carrier and a preparation method thereof. Background technique [0002] Since the beginning of the new century, the world's demand for petrochemical raw materials and petrochemical products will continue to grow, and the demand for propylene as a basic petrochemical raw material will continue to grow, while the production capacity of conventional steam cracking and FCC technology cannot meet the rapidly growing demand for propylene, which makes the market appear. a global shortage. Moreover, with the increasing scarcity of petroleum resources, the production of propylene has changed from relying solely on petroleum as raw material to the technical route of diversifying raw material sources, especially the technical route of producing olefins from low-carbo...

Claims

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Application Information

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Patent Type & Authority Patents(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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