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Cyclohexane oxidation gas content increasing method

A technology of cyclohexane and oxidation gas, which is applied in the field of cyclohexane oxidation, can solve the problems of bias flow and bubble polymerization, and achieve the effects of improving selectivity, huge economic value and social benefits, and increasing gas holdup

Inactive Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a simple, easy to control, low energy consumption, economical solution to the problem of the drift and bubble polymerization of the cyclohexane airlift internal loop reactor, and effectively improve the cyclohexane oxidation gas content rate. method

Method used

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  • Cyclohexane oxidation gas content increasing method

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Effect test

Embodiment 1

[0026] Embodiment 1: respectively with 900Nm 3 / h and 600m 3 Pass air and cyclohexane into the cyclohexane oxidation reactor at a flow rate of / h, and set a gas redistribution plate with a porosity of 55% and a pore diameter of 6mm at 0.5m above the gas distributor to measure cyclohexane The gas holdup rate of the oxidation reactor is 0.94%:

Embodiment 2

[0027] Embodiment 2: respectively with 900Nm 3 / h and 600m 3 Pass air and cyclohexane into the cyclohexane oxidation reactor at a flow rate of / h, and set a gas redistribution plate with a porosity of 25% and a pore diameter of 6mm at 0.5m above the gas distributor to measure cyclohexane The gas holdup rate of the oxidation reactor is 1.19%:

Embodiment 3

[0028] Embodiment 3: respectively with 900Nm 3 / h and 600m 3 Pass air and cyclohexane into the cyclohexane oxidation reaction kettle at a flow rate of / h, and set one block at 0.5m and 1.5m above the gas distributor (a total of two blocks) with a porosity of 55% and a pore diameter of 6mm The gas redistribution plate is used to measure the gas holdup rate of the cyclohexane oxidation reactor to be 1.02%.

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Abstract

The invention provides a cyclohexane oxidation gas content increasing method, wherein 1-3 gas re-distribution plates are arranged above the gas distributor of a cyclohexane oxidation reaction kettle,the open porosity of the gas re-distribution plate is 20-80%, and the open pore size is 2-10 mm. According to the present invention, with the cyclohexane oxidation gas content increasing method, the gas content in the liquid phase during the cyclohexane oxidation can be effectively improved, the reaction rate can be accelerated, the cyclohexane feeding temperature can be reduced, and the selectivity of the oxidation reaction can be improved.

Description

technical field [0001] The invention belongs to the field of cyclohexane oxidation and can be used in the process of cyclohexane oxidation to produce cyclohexanone. Background technique [0002] To prepare cyclohexanol and cyclohexanone, it is usually to oxidize cyclohexane with a gas containing molecular oxygen, first generate an oxidation mixture (cyclohexane oxidation solution) containing cyclohexyl hydroperoxide, cyclohexanol and cyclohexanone, and then use The oxidized mixture is treated with 30% sodium hydroxide liquid caustic so that the cyclohexyl hydroperoxide in it is decomposed to generate cyclohexanol and cyclohexanone. [0003] Reactors for the air oxidation of cyclohexane mainly include stirred reactors and airlift internal loop reactors, both of which have their own advantages and disadvantages. The stirring reactor can make the gas-liquid mixing more uniform, which is beneficial to the oxidation reaction of cyclohexane, but there is a stirring seal that is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/33C07C49/403
Inventor 刘洪武黎树根潘罗其周小文陈立新
Owner CHINA PETROLEUM & CHEM CORP
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