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Regeneration method of catalyst for synthesizing isopropylbenzene

A propylbenzene catalyst and a catalyst technology are applied in the field of catalysis and can solve the problems of affecting catalyst activity and high temperature

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the temperature of the catalyst regeneration process for synthesizing cumene existing in the prior art is too high, which affects the problem of catalyst activity, and a new regeneration method for synthesizing cumene catalyst is provided

Method used

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  • Regeneration method of catalyst for synthesizing isopropylbenzene
  • Regeneration method of catalyst for synthesizing isopropylbenzene
  • Regeneration method of catalyst for synthesizing isopropylbenzene

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Take the freshly synthesized cumene catalyst (catalyst X0), when the molar ratio of benzene to benzene is 2.0, and the space velocity of propylene is 1.0h -1 , and the reaction temperature was 170°C, put it into a fixed-bed reactor with a catalyst loading of 40g, and continue the reaction for 1000h. At this time, the activity of the catalyst decreased, and this batch of catalyst was unloaded, which was recorded as deactivated catalyst Y.

[0027]

Embodiment 2

[0029] A fork-type dielectric barrier discharge reactor (consisting of needle-shaped electrodes intersecting, the dielectric material is quartz, see figure 1 ), apply a pulse voltage of 20kV, the frequency of the voltage is 1000Hz, the rising edge time is 200ns, and the pulse width is 400ns. Get 5 grams of deactivated catalyst Y for synthesizing cumene and place it in the discharge area of ​​the dielectric barrier discharge reactor, and place it evenly, and feed air into the device, the air flow rate is 1000ml / min, turn on the power switch, and process for 30min , the regenerated catalyst A1 was obtained, and the catalyst activity after being used for 1000 hours and regenerated twice by the same method was designated as A3.

[0030]

Embodiment 3

[0032] A needle-plate dielectric barrier discharge reactor (composed of needle electrodes and plate electrodes, and ordinary glass as the dielectric material) is used to apply a pulse voltage of 5kV. The frequency of the voltage is 1000Hz, the rising edge time is 200ns, and the pulse width is 400ns. Get 5 grams of deactivated catalyst Y for synthesizing cumene and place it in the discharge area of ​​the dielectric barrier discharge reactor, and place it evenly, and feed air into the device, the air flow rate is 1000ml / min, turn on the power switch, and process for 3min , the regenerated catalyst B1 was obtained, and the catalyst activity after being used for 1000 hours and regenerated twice by the same method was designated as B3.

[0033]

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Abstract

The invention relates to a regeneration method of a catalyst for synthesizing inactivated isopropylbenzene, aiming at solving the problems that the regeneration process of the existing catalyst for synthesizing isopropylbenzene has high requirements for oxygen content, regeneration temperature, regeneration time control, and the activity of the catalyst can be seriously influenced by any carelessness. The dielectric barrier discharge technology is adopted to regenerate the inactivated catalyst, O2 used as working gas is ionized into high-activity low-temperature plasma particles such as O<2->, O<-> and O2<2-> in a discharging state, which can be reacted with surface carbon, toxics and the like of the catalyst, and then get away from the reactor in a gas state, therefore, the O2 has no adverse effect on the catalyst, the activity of the catalyst can be restored and even improved to some extent. According to the regeneration method, the process is simple and can be operated simply, in the regeneration process, little electrical energy is only consumed, the catalyst regeneration effect is good, the service life of the catalyst is prolonged, and thus, the method can be used for regenerating the catalyst for synthesizing isopropylbenzene.

Description

Technical field [0001] The invention relates to a method for regenerating a deactivated catalyst for synthesizing cumene, and belongs to the technical field of catalysis. Background technique [0002] Cumene is an important basic raw material for organic chemicals, mainly used to produce phenol and acetone with a wide range of uses. Currently, 90% of the world's phenol comes from the cumene production route, so the growth in demand for phenol and acetone has driven the growth in demand for cumene. Cumene and its phenol acetone industry, as one of the main development directions of Sinopec, have a broad domestic market. It is expected that in the next 10 years, due to the strong growth in demand for phenol, the domestic market demand for cumene will continue With rapid growth, the total scale of cumene production equipment is likely to increase from the current 800,000 tons / year to about 3 million tons / year, so about 50 to 100 tons / year of cumene catalyst is needed. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/12
Inventor 李晓韬郭宏利高焕新朱志焱
Owner CHINA PETROLEUM & CHEM CORP
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