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Regeneration method of copper, ruthenium, cobalt, nickel, palladium and platinum-based metal catalysts

A metal catalyst and catalyst technology, which is applied in the direction of catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalyst, molecular sieve catalyst, etc., and can solve the problem of catalyst comprehensive performance degradation and other problems

Active Publication Date: 2012-04-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the overall performance of the regenerated catalyst is actually reduced, and even in some cases, some catalyst users are often forced to choose to replace the catalyst

Method used

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  • Regeneration method of copper, ruthenium, cobalt, nickel, palladium and platinum-based metal catalysts
  • Regeneration method of copper, ruthenium, cobalt, nickel, palladium and platinum-based metal catalysts
  • Regeneration method of copper, ruthenium, cobalt, nickel, palladium and platinum-based metal catalysts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In this example, deactivated catalysts A-F were obtained; the composition and preparation method of each catalyst are listed in Table 1 in detail.

[0064] Table 1 Composition and preparation method of catalysts A to F

[0065]

[0066] The distribution of catalysts A to E is used in the hydrogenation of 3-hydroxypropionaldehyde to prepare 1,3-propanediol, the hydrogenation of ethanol to synthesize ethylamine, the gas-phase hydrogenation of dimethyl oxalate, the liquid-phase hydrogenation of benzene to prepare cyclohexane, and the cracking of C5 For the reaction of hydrodeykyne in the isoprene stream, the carbon distribution of the surface area of ​​the catalyst after use is 9.2wt%, 6.5wt%, 11.2wt%, 4.5wt%, 18.2wt%.

Embodiment 2

[0068] A and B catalysts are used in a fixed bed reactor (diameter 15mm, length 400mm, with two temperature display control points). After deactivation, the temperature of both catalysts was raised to 120° C. in nitrogen, and then steam was passed through and kept for 2 hours. Subsequently, feed nitrogen containing 4vol% oxygen and heat up to 200°C, maintain for 2 hours, then switch to nitrogen containing 10vol% oxygen for 1h, then raise the temperature to 350°C, keep for 1h, switch to air, keep for 1h, and then heat up to 400°C, maintained for 2 hours, blowing nitrogen to blow down the temperature. After the reactor cools down to 110°C, hydrogen-containing methane is introduced, and the temperature is gradually raised to 300°C, while the hydrogen is gradually converted from 1 vol% to pure hydrogen. Then the temperature was lowered to 80°C, hydrogen gas containing 2vol% trimethylchlorosilane and 1vol% trimethylmethoxyalkane was passed into the reactor, the flow rate was contr...

Embodiment 3

[0070] Catalysts C, D and E are used in fixed-bed reactors, slurry-bed reactors and reaction-rectification reactors, and the catalysts are deactivated and then transferred from the reactors. Packed into a fixed bed reactor (diameter 35mm, length 1800mm, with six temperature display control points), and purged with argon after sealing. After purging in argon for 0.5h, the organic solvents of toluene and n-hexane in the liquid phase were introduced, and the washing was circulated for 3h, and the temperature was gradually changed from room temperature to 80°C. After the washing is stopped, different gases are passed into the catalyst: C, D and E catalysts are distributed as nitrogen containing oxygen, argon containing hydrogen, and methane hydrogen containing water vapor; the temperature is slowly raised from 80°C to 360°C, and then cooled . For catalyst C, nitrogen containing 30% hydrogen was passed through for reduction for 20 hours, and the temperature was raised from 40°C to...

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Abstract

The invention relates to a regeneration method of copper, ruthenium, cobalt, nickel, palladium and platinum-based metal catalysts. In order to reduce the carbon deposition rate of a regenerated catalyst and prolong the service life of the regenerated catalyst, the invention provides a method. The method comprises the following steps: removing deposited carbon of the catalyst, activating and carrying out silanization treatment. Compared with the existing catalyst regeneration method, the method has the advantages that the yield of target products (the obtained catalyst) is high, and the amountof byproducts generated due to nonmetal catalysis is greatly reduced; the amount of carbon generated on the surface of the catalyst is low, and the catalyst has longer service life; and the influenceof the water content on the catalyst is reduced. The regeneration method is simple to operate, and has lower cost increase compared with that in the prior art.

Description

technical field [0001] The invention relates to a method for regenerating metal catalysts after deactivation, specifically, the invention is to regenerate metal catalysts that use more than one of copper, ruthenium, cobalt, nickel, palladium and platinum as active components , so that the reaction performance of the catalyst is restored, and the anti-carbon deposition performance is enhanced, which belongs to the chemical application field. Background technique [0002] It is well known that catalysts, including metal catalysts, have a certain service life. Generally speaking, in the normal operation of industrial catalysts, it can be divided into three stages according to the time: induction period, stabilization period and deactivation period. Catalyst deactivation does not completely refer to the complete loss of catalyst activity during the deactivation period, but more to the gradual reduction of catalyst activity or selectivity during the stable period during use. Th...

Claims

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Application Information

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IPC IPC(8): B01J38/10B01J38/04B01J38/06B01J23/755B01J23/89B01J23/80B01J29/74B01J23/62C07C31/20C07C29/141
CPCY02P20/54Y02P20/584
Inventor 戴伟黄龙田保亮彭晖唐国旗
Owner CHINA PETROLEUM & CHEM CORP
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