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Device and method for catalytic tail chlorine dehydrogenation and catalyst regeneration by adopting metal oxides

A catalyst and oxide technology, applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex procedures and high operating costs, and achieve the effect of improving stability and improving industrial efficiency.

Inactive Publication Date: 2018-11-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the tail chlorine dehydrogenation scheme reported in the existing literature, the catalyst must be reduced before it can be reused, which makes the process complicated and the operation cost high

Method used

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  • Device and method for catalytic tail chlorine dehydrogenation and catalyst regeneration by adopting metal oxides

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The components of industrial tail chlorine are: H 2 , 3.97%; Cl 2 , 72.85%; O 2 , 9.93%; N 2 , 13.25%.

[0057] Copper oxide powder is used as catalyst. The catalyst packing height is 0.35m, the reaction temperature is 70°C, and the apparent operating gas velocity Uf=0.3m / s. When the tail chlorine is dehydrogenated under this condition, the hydrogen conversion rate can reach 75.56%. The mass concentration of polyvinyl alcohol solution is 0.5%, the microwave reaction temperature is 180°C, and the reaction time is 5min. The residence time of the catalyst in the reaction fluidized bed is 4h, and the regeneration time of the catalyst is 3h.

Embodiment 2

[0059] The components of industrial tail chlorine are: H 2 , 3.05%; Cl 2 , 72.36%; O 2 , 10.31%; N 2 , 14.25%.

[0060] Copper oxide particles are used as the catalyst. The catalyst packing height is 0.45m, the reaction temperature is 130°C, and the apparent operating gas velocity Uf=0.35m / s. When tail chlorine is dehydrogenated under this condition, the hydrogen conversion rate can reach 81.76%. The mass concentration of polyvinyl alcohol solution is 1%, the microwave reaction temperature is 160°C, and the reaction time is 3min. The residence time of the catalyst in the reaction fluidized bed is 4.5h, and the regeneration time of the catalyst is 3h.

Embodiment 3

[0062] The components of industrial tail chlorine are: H 2 , 3.97%; Cl 2 , 72.85%; O 2 , 9.93%; N 2 , 13.25%.

[0063] Cobalt oxide powder is used as catalyst. The catalyst packing height is 0.45m, the reaction temperature is 130°C, and the apparent operating gas velocity Uf=0.35m / s. Under this condition, when the tail chlorine is dehydrogenated, the hydrogen conversion rate can reach 87.33%. The mass concentration of polyvinyl alcohol solution is 0.5%, the microwave reaction temperature is 180°C, and the reaction time is 5min. The residence time of the catalyst in the reaction fluidized bed is 4.5h, and the regeneration time of the catalyst is 2.5h.

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Abstract

The invention discloses a device and a method for catalytic tail chlorine dehydrogenation and catalyst regeneration by adopting metal oxides. The device comprises a tail chlorine dehydrogenation reactor and a catalyst regeneration device. Copper oxide or cobalt oxide is used as a catalyst, a fluidized bed reactor is adopted for tail chlorine dehydrogenation reaction, the deactivated catalyst afterdissolution is mixed with a polyvinyl alcohol solution, a sodium hydroxide solution is added after stirring, and then the copper oxide or the cobalt oxide can be prepared by microwave heating to achieve the purpose of catalyst regeneration. The device disclosed by the invention is used for tail chlorine dehydrogenation under the condition of low temperature and can perform continuous production,thereby meeting the requirements for catalytic tail chlorine dehydrogenation in the industrial production; the catalyst can be regenerated, so that the problem of easy deactivation of the catalyst issolved, and the economic values of tail chlorine utilization are improved.

Description

technical field [0001] The invention relates to a device and method for using metal oxides to catalyze tail chlorine dehydrogenation and catalyst regeneration, and belongs to the technical field of tail chlorine dehydrogenation and catalyst regeneration. Background technique [0002] The tail chlorine in the chlor-alkali industry is mainly composed of chlorine, including oxygen, nitrogen and hydrogen, and its volume content is respectively, chlorine (65-85%), nitrogen (10-15%), oxygen (5-10%), Hydrogen (1.5-4%), since the explosion limit of hydrogen is 4%, the existence of hydrogen has become the biggest safety hazard in the tail gas. The traditional chlor-alkali industry usually burns hydrogen and chlorine into hydrochloric acid at high temperature to remove the chlorine in the tail gas. Hydrogen, but the chlorine in the tail chlorine in this method cannot be fully utilized, and the industrial benefit is low. [0003] Using a catalyst to remove the hydrogen in the tail chl...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/46B01J38/52B01J38/64
CPCB01D53/8671B01D2255/20746B01D2255/20761B01D2256/26B01D2257/108B01J38/52B01J38/64
Inventor 薛建伟刘茜陈小圈吕志平李福祥
Owner TAIYUAN UNIV OF TECH