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Hydrogenating method of unsaturated alkane based on microwaves

An unsaturated and alkane technology, applied in the field of hydrogenation of unsaturated alkanes, can solve the problems of hydrogenation catalyst poisoning, hydrogenation catalyst deactivation, shortening of catalyst service life, etc., and achieves high conversion rate, mild reaction conditions and cost saving Effect

Active Publication Date: 2014-09-24
QINGDAO DONGFANG RECYCLING ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hydrogenation reaction of low-carbon unsaturated alkanes is a very simple reaction, and it is also a reaction that is easy to occur. Generally, under the action of a hydrogenation catalyst, the reaction can occur at 100-200 ° C. However, due to the high concentration of these tail gases The sulfur and CO will poison the hydrogenation catalyst, thereby deactivating the hydrogenation catalyst and greatly shortening the service life of the catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Pour ethylene into a 25mL microwave reaction container. After replacing the air for 3 times, pour in 30psi of ethylene, and finally, flush in hydrogen. Controlled at 80°C, reacted for 2h.

[0018] After the reaction was completed, the reaction gas was taken for gas chromatography test, and it was found that the conversion rate of ethylene was 95%.

Embodiment 2

[0020] Pour acetylene into a 25mL microwave reaction container, replace the air three times, then pour in 30psi of acetylene, and finally flush in hydrogen gas, which is 2.5 times the amount of acetylene, that is, 75psi, turn on microwave irradiation, the microwave power is 15w, the temperature Controlled at 80°C, reacted for 2h.

[0021] After the reaction was completed, the reaction gas was taken for gas chromatography test, and it was found that the conversion rate of acetylene was 95%.

Embodiment 3

[0023] Pour ethylene into a 25mL microwave reaction container. After replacing the air for 3 times, pour in 30psi of ethylene, and finally, pour in hydrogen. Controlled at 80°C, reacted for 2h.

[0024] After the reaction was completed, the reaction gas was taken for gas chromatography test, and it was found that the conversion rate of ethylene was 98%.

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PUM

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Abstract

The invention discloses a hydrogenating method of unsaturated alkane based on microwaves. The method comprises the following steps: introducing a certain amount of unsaturated alkane into a 25mL microwave container; after replacing air for three times, introducing 20-100psi unsaturated alkane; finally, introducing hydrogen with pressure being 30-250psi for microwave radiation for 1-5 hours, wherein the microwave radiation power is 10-25w and the reaction temperature is 20-100 DEG C; and carrying out a reaction on the unsaturated alkane with hydrogen under a condition without a catalyst so as to hydrogenate and saturate the unsaturated alkane. The method is mild in reaction condition and high in conversion ratio, thereby facilitating cost-saving.

Description

technical field [0001] The invention relates to a hydrogenation method, in particular to a hydrogenation method for unsaturated alkanes. Background technique [0002] In the production process of petrochemical, chemical and other industries, a large amount of tail gas containing CO is often produced, mainly CO and H 2 , in addition to containing CH 4 , CO 2 , N 2 And trace amounts of sulfide, acetylene, ethylene and oxygen. In recent years, from the perspective of comprehensive utilization of resources, energy saving and consumption reduction, the comprehensive utilization of CO-rich industrial waste gases such as acetylene tail gas, calcium carbide furnace gas and coke oven gas is being actively developed at home and abroad. Can such waste gases be used as methanol or ammonia synthesis gas? , the key lies in whether acetylene and ethylene can be removed. Catalytic hydrogenation is more effective for the removal of trace amounts of acetylene and ethylene. However, it is...

Claims

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Application Information

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IPC IPC(8): C07C9/06C07C5/03C07C5/08
Inventor 建方方马连湘吴锋薛兴楠
Owner QINGDAO DONGFANG RECYCLING ENERGY
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