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Hydrogen selective oxidation catalyst used in the propane dehydrogenation process and preparation method thereof

An oxidation catalyst and propane dehydrogenation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as low oxygen conversion rate and high hydrocarbon consumption , to achieve high oxygen conversion rate, low hydrocarbon loss rate and good technical effect

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is that there are problems in the previous literature that the oxygen conversion rate is relatively low and the consumption of hydrocarbons is relatively large, and a new hydrogen selective oxidation catalyst used in the propane dehydrogenation process is provided

Method used

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  • Hydrogen selective oxidation catalyst used in the propane dehydrogenation process and preparation method thereof
  • Hydrogen selective oxidation catalyst used in the propane dehydrogenation process and preparation method thereof
  • Hydrogen selective oxidation catalyst used in the propane dehydrogenation process and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 2 grams over a surface of 50 meters 2 / g, nano-Al with a pore size of 29 nm 2 o 3 Carrier, add 10 ml of deionized water, pipette 0.18 ml of H 2 PtCl 6 solution and 1.44 ml of LiNO 3 solution, add dropwise 0.022 g of SnCl 4 Solution, adjust the pH value of the solution to 1.5 with 2.5% ammonia water, then soak in a water bath at 80°C for 1 hour, take out the sample and filter it, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C ℃ for 4 hours to obtain the desired catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: the selectivity of hydrogen in the process was 62%, the conversion rate of oxygen was 98.1%, and the loss rate of hydrocarbon was 0.9%. .

Embodiment 2

[0028] Weigh 2 grams over a surface of 50 meters 2 / g, nano-Al with a pore size of 29 nm 2 o 3 Carrier, add 10 ml of deionized water, pipette 0.88 ml of H 2 PtCl 6 solution and 7.2 ml of LiNO 3 solution, add dropwise 0.0439 g of SnCl 4 Solution, adjust the pH value of the solution to 1.5 with 2.5% ammonia water, then soak in a water bath at 80°C for 1 hour, take out the sample and filter it, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C ℃ for 4 hours to obtain the desired catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: the selectivity of hydrogen in the process was 86%, the conversion rate of oxygen was 98.5%, and the loss rate of hydrocarbon was 0.7%. .

Embodiment 3

[0030] Weigh 2 grams over a surface of 50 meters 2 / g, nano-Al with a pore size of 29 nm 2 o 3 Carrier, add 10 ml of deionized water, pipette 0.88 ml of H 2 PtCl 6 solution and 7.2 ml of LiNO 3 solution, add dropwise 0.2195 g of SnCl 4Solution, adjust the pH value of the solution to 1.5 with 2.5% ammonia water, then soak in a water bath at 80°C for 1 hour, take out the sample and filter it, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C ℃ for 4 hours to obtain the desired catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: in the process, the selectivity of hydrogen was 81%, the conversion rate of oxygen was 98.2%, and the loss rate of hydrocarbon was 0.7%. .

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Abstract

The invention relates to a hydrogen selective oxidation catalyst used in the propane dehydrogenation process and a preparation method thereof, and mainly solves the problems of low oxygen conversion rate and high hydrocarbon loss of the hydrogen oxidation catalyst in the prior art. By adopting a technical scheme that the hydrogen selective oxidation catalyst comprises the following components in percentage by weight: 0.1 to 10 percent of Pt or oxide thereof, 0.25 to 10 percent of Sn or oxide thereof, 0.1 to 10 percent of Li or oxide thereof, and 80 to 99 percent of nano alumina, and a preparation method for the catalyst is provided, the problems are better solved; and the catalyst can be used for propane dehydrogenation-hydrogen selective oxidation industrial production.

Description

technical field [0001] The invention relates to a hydrogen selective oxidation catalyst used in the propane dehydrogenation process and a preparation method thereof. Background technique [0002] As one of the three most widely used olefins in industry, propylene mainly comes from ethylene co-production and refinery by-products. However, due to the strong demand for propylene in recent years, it is difficult to expand propylene production capacity by the above-mentioned method alone. Therefore, the development of new The propylene production process is very important, and the catalytic dehydrogenation of propane to propylene technology occupies an increasingly important position. The method uses propane as a raw material, and obtains the target product propylene under the action of a dehydrogenation catalyst, and at the same time obtains by-product hydrogen. Since propane dehydrogenation is a reversible reaction in which the number of molecules increases and absorbs heat, th...

Claims

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Application Information

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IPC IPC(8): B01J23/62C07C11/06C07C5/48
CPCY02P20/52
Inventor 吴省吴文海樊志贵缪长喜陈庆龄杨为民
Owner CHINA PETROLEUM & CHEM CORP
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