Regeneration method for catalyst for preparing epoxypropane by propylene epoxidation

A catalyst and epoxidation technology, applied in the direction of catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve problems such as complex operation and difference in catalytic performance

Active Publication Date: 2014-04-30
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1921938A and CN102307658A announced the regeneration technology of the molecular sieve catalyst related to the load, and the regeneration process is divided into two steps, and the operation is complicated
CN1446630A discloses the regeneration method of gold catalyst in the propylene epoxidation system, yet its catalyst must include a kind of metal accelerator
Not suitable for catalysts that do not contain non-metallic promoters, the catalytic performance and deactivation kinetics will be significantly different

Method used

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  • Regeneration method for catalyst for preparing epoxypropane by propylene epoxidation
  • Regeneration method for catalyst for preparing epoxypropane by propylene epoxidation
  • Regeneration method for catalyst for preparing epoxypropane by propylene epoxidation

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Embodiment 1

[0061] The fresh 0.1% Au / TS-1 catalyst was loaded in a fixed-bed reactor, the catalyst filling amount was 0.15g, and the evaluation was conducted according to conventional conditions. The deactivated catalyst was regenerated after a period of time: the reaction gas was switched to air, the temperature was raised to 300 degrees at a rate of 5 degrees per minute, and the catalyst was regenerated for 3 hours. See attached for regeneration results Figure 1-3 .

[0062] The results show that the regeneration method proposed by the present invention can effectively restore the catalytic performance of the catalyst.

Embodiment 2

[0064] Load fresh 0.15% Au / TS-1 catalyst in a fixed-bed reactor with a catalyst filling amount of 0.15g, and evaluate it according to conventional conditions. Regenerate the deactivated catalyst after a period of time: switch the reactant gas to hydrogen: oxygen: nitrogen = 0.1:1.9:8, heat up to 300 degrees at a rate of 10 degrees per minute, and regenerate the catalyst for 2 hours. See attached for regeneration results image 3 .

[0065] The results show that the regeneration method proposed by the present invention can effectively restore the catalytic performance of the catalyst.

Embodiment 3

[0067] The fresh 0.10% Au / TS-1-1-butyl-3-methylimidazole tetrafluoroborate catalyst was loaded into the fixed bed reactor, the catalyst filling amount was 0.15g, and the evaluation was carried out according to conventional conditions. Regenerate the deactivated catalyst after a period of time: switch the reaction gas to oxygen: argon=2:8, heat up to 280 degrees at a rate of 5 degrees / min, and regenerate the catalyst for 2.5 hours. See attached for regeneration results Picture 10 .

[0068] The results show that regeneration of the catalyst containing the promoter by the method proposed by the present invention can also effectively restore the catalytic performance of the catalyst.

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Abstract

The invention discloses a regeneration method for a catalyst for preparing epoxypropane by propylene epoxidation. The catalyst comprises gold nano-particles and carriers. The method comprises the step of reacting under regeneration reaction gas by means of heating to temperature from 200 to 400 DEG C at a heating speed of 0.5-30 DEG C / min, so as to enale the catalyst for the propylene epoxidation to be regenerated.

Description

Technical field [0001] The invention relates to catalyst regeneration, in particular to its use in a system for preparing propylene oxide by direct gas phase epoxidation of propylene. Background technique [0002] As the human demand for petrochemical raw materials and petrochemical products in the world will continue to grow, as the third largest organic chemical product in the production of propylene derivatives after polypropylene and acrylonitrile, propylene oxide (PO) is widely used in the preparation of polyurethane And derivatives such as polyester resin. With the gradual migration of the global center of polyurethane to China, China's propylene oxide industry has developed rapidly. According to statistics, the consumption of propylene oxide in my country has increased from 65 to 1.65 million tons per year in the past five years, an annual growth rate of about 20%, and the import volume of propylene oxide has increased from 15 to 360,000 tons per year, and the annual grow...

Claims

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Application Information

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IPC IPC(8): B01J38/12B01J29/90B01J29/89B01J31/40B01J31/38B01J23/52B01J23/96C07D301/10C07D303/04
CPCY02P20/52Y02P20/584
Inventor 周兴贵冯翔段学志钱刚
Owner EAST CHINA UNIV OF SCI & TECH
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