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Regeneration method of ethylbenzene catalyst

An ethylbenzene catalyst and catalyst technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low recycling rate and poor regeneration effect of deactivated ethylbenzene catalysts, and achieve The effects of improved ethylation selectivity, excellent catalytic performance, and improved ethylene conversion

Active Publication Date: 2018-02-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of poor regeneration effect and low reuse rate of the deactivated ethylbenzene catalyst existing in the prior art, and a new regeneration method of the ethylbenzene catalyst is provided

Method used

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  • Regeneration method of ethylbenzene catalyst

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Experimental program
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Effect test

Embodiment 1

[0026] After unloading the deactivated ethylbenzene catalyst in the reactor, treat it with 1.5wt% tetrabutylammonium hydroxide solution for 5 hours, wherein the solid-to-liquid ratio of the deactivated catalyst and tetrabutylammonium hydroxide solution is 15:1, the treatment temperature Then the catalyst was dried at 145°C for 4 hours under a nitrogen atmosphere; finally, the catalyst was calcined at a high temperature of 550°C for 5 hours under an air atmosphere to obtain the regenerated ethylbenzene catalyst A.

Embodiment 2

[0028] After the deactivated ethylbenzene catalyst in the reactor was unloaded, it was treated with 6.0 wt% tetrapropyl ammonium hydroxide solution for 8 hours, wherein the solid-to-liquid ratio of the deactivated catalyst and tetrapropyl ammonium hydroxide solution was 20: 1. The treatment temperature is 70°C; then the catalyst is dried at 140°C for 2 hours in a nitrogen atmosphere; finally, the catalyst is calcined at a high temperature of 600°C for 6 hours in an air atmosphere to obtain the regenerated ethylbenzene catalyst B.

Embodiment 3

[0030] After unloading the deactivated ethylbenzene catalyst in the reactor, treat it with a 3.5wt% triethylamine solution for 5 hours, wherein the solid-to-liquid ratio of the deactivated catalyst and the triethylamine solution is 25:1, and the treatment temperature is 70 °C; then the catalyst was dried at 160 °C for 6 hours under a nitrogen atmosphere; finally, the catalyst was calcined at a high temperature of 500 °C for 2 hours under an air atmosphere to obtain the regenerated ethylbenzene catalyst C.

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Abstract

The invention relates to a regeneration method of an ethylbenzene catalyst, which solves the problems of poor regeneration effect and low repetition utilization rate of the ethylbenzene catalyst in the prior art. According to the method, 0.1-20.0 wt% of organic ammonium or an organic ammonium solution for processing the inactivated ethylbenzene catalyst for 2-20 hours, drying the inactivated ethylbenzene catalyst at the temperature of 100-200 DEG C for 2-10 hours under nitrogen atmosphere, roasting the inactivated ethylbenzene catalyst for 2-10 hours at the temperature of 400-800 DEG C under air atmosphere, wherein, a solid liquid ratio of the inactivated ethylbenzene catalyst to organic amine or the organic ammonium solution is (5-50):1, and the processing temperature is 50-120 DEG C. The method better solves the problem and can be used for industrial application of the ethylbenzene catalyst.

Description

technical field [0001] The invention relates to a regeneration method of a catalyst, in particular to a regeneration method of an ethylbenzene catalyst. Background technique [0002] Ethylbenzene is an important organic chemical raw material, mainly used to produce styrene, and the downstream products of styrene, such as engineering plastics, synthetic resins, synthetic rubber, etc., are important raw materials for industries such as construction, automobiles, electronics and daily necessities, and have a wide range of uses. With the implementation of national major construction projects and the rapid development of related industries such as construction, transportation and manufacturing, the market demand for ethylbenzene and its downstream synthetic materials has increased rapidly. [0003] The vast majority of ethylbenzene in the world is produced by the alkylation reaction of benzene and ethylene. The industrial ethylbenzene synthesis process mainly includes the traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/66C07C2/66C07C15/073
CPCY02P20/584
Inventor 张斌杨为民孙洪敏薛明伟王振东
Owner CHINA PETROLEUM & CHEM CORP