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External activation method of benzene oxidation to maleic anhydride catalyst

An activation method and catalyst technology, applied in the direction of catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as increased input costs, and achieve cost savings, performance improvements, and increased activation costs Effect

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2005, there was a patent in my country with the publication number CN1579631A, which belongs to the external activation method. The method proposed in this patent is to use ammonia-containing air for activation, and the ammonia air ratio needs to be controlled at 1:25-1:5, and because Adding ammonia will increase the input cost

Method used

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  • External activation method of benzene oxidation to maleic anhydride catalyst
  • External activation method of benzene oxidation to maleic anhydride catalyst
  • External activation method of benzene oxidation to maleic anhydride catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 150ml of maleic anhydride catalyst by benzene oxidation, put it into the cylindrical liner 6 of the activation furnace, seal the top cover flange 3, and close the air inlet 1 at one end of the activator. Raise the temperature at 50°C per hour to 300°C. After reaching the temperature, continue to raise the temperature at 25°C per hour until the temperature rises to 450°C and keep it warm for 4 hours. Cool down to room temperature naturally, and cut off the power supply. Afterwards, take out the catalyst after activation, load on the 120ml evaluation device, at a space velocity of 2000hr -1 , Benzene concentration 48~54g / M 3 conditions are evaluated.

Embodiment 2

[0026] Measure 260 ml of maleic anhydride series catalysts by benzene oxidation, put them into the cylindrical liner 6 of the activation furnace, seal the top cover flange 3, and close the air inlet 1 at one end of the activator. Raise the temperature at 50°C per hour to 300°C. After reaching the temperature, continue to raise the temperature at 25°C per hour until the temperature rises to 450°C and keep the temperature for 6 hours. Cool down to room temperature naturally, and cut off the power supply. Afterwards, with embodiment 1.

Embodiment 3

[0028] Measure 180 ml of maleic anhydride series catalysts by benzene oxidation, put them into the cylindrical liner 6 of the activation furnace, seal the top cover flange 3, and close the air inlet 1 at one end of the activator. Raise the temperature at 50°C per hour to 310°C. After reaching the temperature, continue to raise the temperature at 25°C per hour until the temperature rises to 460°C and keep the temperature for 5 hours. Cool down to room temperature naturally, and cut off the power supply. Afterwards, with embodiment 1.

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Abstract

The invention discloses an ex-situ activation method of a benzene oxidation to maleic anhydride catalyst. The external activation method comprises the following steps: placing the benzene oxidation to maleic anhydride catalyst in an external activation reactor or evaluation reactor; and heating the benzene oxidation to maleic anhydride catalyst to 300 DEG C, then continuously heating to 400-500 DEG C at the speed of 25-40 DEG C / h, performing heat preservation for 4-12 hours, and naturally cooling to room temperature. The catalyst activated by the method can be directly heated to production operation temperature and then material can be added; and compared with the catalyst activated by the previous common method, performances of the catalyst are improved, and evaluation shows that the conversion rate of the catalyst is basically more than 99% and the yield of the catalyst reaches 99-103%.

Description

technical field [0001] The invention relates to the field of organic synthesis V-Mo metal oxide catalyst activation process method. Background technique [0002] Maleic anhydride (referred to as maleic anhydride) is an important organic chemical raw material. At present, it is mainly used in the production of synthetic resin, food, pesticide, medicine, papermaking, paint, textile and other industries, and the market demand for maleic anhydride is increasing day by day. [0003] At present, the production of maleic anhydride is divided into methods, mainly fixed bed oxidation method and fluidized bed method; according to raw material route, there are mainly two production routes of benzene oxidation and n-butane oxidation. Since C4 resources in my country are relatively concentrated in a few large petrochemical enterprises, which is not conducive to transportation, and benzene raw materials are relatively more advantageous, so most of the production equipment in my country a...

Claims

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Application Information

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IPC IPC(8): B01J38/02C07D307/60
CPCY02P20/584
Inventor 胡波陈雅萍任建寅贾雪飞
Owner CHINA PETROLEUM & CHEM CORP
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