Method for preparing low-carbon alkane dehydrogenation catalyst

A technology of dehydrogenation catalyst and low-carbon alkanes, which is applied in the direction of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problem of not forming complex forms, etc., and achieve excellent alkane conversion rate and olefin selectivity effect

Inactive Publication Date: 2016-04-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the preparation of this type of catalyst, Pt and Sn are loaded on the carrier step by step, and no complex form is formed.

Method used

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  • Method for preparing low-carbon alkane dehydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of Sn-containing γ-Al 2 o 3 Carrier: After mixing a certain amount of 0.98M aluminum trichloride solution and 0.01M tin tetrachloride solution, add a certain amount of 8% ammonia water, mix evenly in a neutralization tank at 60~80°C, and control the pH value 7.0~9.0, after filtering, washing with water and acidifying, pressurize into spheres in the oil ammonia column, dry and age, and roast at 650~750℃ for 4 hours to get a spherical shape with a particle size of 1.5mm and containing 1.5wt% Sn alumina.

[0027] Preparation of impregnation solution: 1.08g ZnCl 2 Dissolve in 20ml of deionized water, and dropwise add 6ml of ammonia water with a mass concentration of 25% to it, and stir thoroughly after the addition to completely dissolve the formed white precipitate. Add deionized water to dilute to 100ml. Weigh 0.2 g of cisplatin and add to the above solution, stir and heat to 60° C. in a water bath.

[0028] Measure 50ml of spherical alumina carrier conta...

Embodiment 2

[0035] The preparation of the catalyst carrier is the same as in Example 1.

[0036] Preparation of impregnation solution: 3.38g of ZnCl 2 Dissolve in 20ml of deionized water, and dropwise add 31ml of ammonia water with a mass concentration of 15% to it, and stir thoroughly after the addition to completely dissolve the formed white precipitate. Add deionized water to dilute to 150ml. Weigh 0.58 g of cisplatin and add it into the above solution, stir and heat to 60° C. in a water bath.

[0037] Measure 100ml of spherical alumina carrier containing 1.5wt% Sn and weigh its mass to be about 54g. It was placed in a rotary evaporator and vacuumed for 30 min. The impregnating solution was sucked into the rotary evaporator, the vacuum pump was turned off, the temperature of the water bath was kept at 70°C, and the impregnation was carried out under normal pressure for 6 hours.

[0038] Then, the temperature of the water bath was raised to 80° C., the catalyst was vacuum-dried, the...

Embodiment 3

[0040] The preparation of the catalyst carrier is the same as in Example 1.

[0041] Preparation of impregnation solution: 4.5g of ZnCl 2 Dissolve in 25ml of deionized water, and dropwise add 28ml of ammonia water with a mass concentration of 20% to it, and stir thoroughly after the addition to completely dissolve the formed white precipitate. Add deionized water to dilute to 200ml. Weigh 1 g of cisplatin and add to the above solution, stir and heat to 60° C. in a water bath.

[0042] Measure 100ml of spherical alumina carrier containing 3wt% Sn and weigh its mass to be about 54g. It was placed in a rotary evaporator and vacuumed for 30 min. The impregnating solution was sucked into the rotary evaporator, the vacuum pump was turned off, the temperature of the water bath was kept at 70°C, and the impregnation was carried out under normal pressure for 6 hours.

[0043] Then, the temperature of the water bath was raised to 80° C., the catalyst was vacuum-dried, then transferr...

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Abstract

The invention discloses a method for preparing a low-carbon alkane dehydrogenation catalyst. The method comprises the following steps: 1) dropping ammoniacal liquor into a ZnCl2 aqueous solution to obtain white Zn(OH)2 precipitate, fully stirring the precipitate and dissolving the precipitate, adding water for dilution to obtain a Zn(NH3)4Cl2 solution, adding a platinum-containing compound, fully stirring the material and heating the material to obtain an impregnation liquid; and 2) impregnating a carrier by the impregnation liquid obtained in the step 1), drying the carrier and calcining the carrier to obtain the low-carbon alkane dehydrogenation catalyst. Through a complexation co-impregnation method, Pt and Zn are loaded on the surface of the carrier, and the low-carbon alkane dehydrogenation catalyst with good dehydrogenation activity is prepared.

Description

technical field [0001] The invention relates to a preparation method of a low-carbon alkane dehydrogenation catalyst. Background technique [0002] The development of shale gas in North America has led to a sharp decline in natural gas prices relative to crude oil prices, while the production of large condensate liquids (NGLs) in shale gas has also increased rapidly. Shale gas condensate is rich in low-carbon alkanes such as ethane, propane, and butane. Ethane can be used as a cracking raw material to produce ethylene. Therefore, FCC technology alone cannot meet the rapidly growing demand for propylene. Dehydrogenation of low-carbon alkanes in natural gas (conventional natural gas, shale gas, coalbed methane, combustible ice, etc.) to produce low-carbon olefins is an effective way to solve this problem. Moreover, with the increasing scarcity of petroleum resources, the production of propylene has changed from relying solely on petroleum as a raw material to diversifying the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62C07C11/06C07C5/333
CPCY02P20/52
Inventor 王振宇张海娟李江红
Owner CHINA PETROLEUM & CHEM CORP
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