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Regeneration and application method of palladium/carbon catalyst

A carbon catalyst and reducing agent technology, which is applied in the field of palladium/carbon catalyst regeneration and application, can solve the problems of high cost and long treatment cycle, and achieve the effect of less treatment steps, low treatment cost and saving regeneration time

Active Publication Date: 2017-12-22
淄博优新新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the technical problems of long treatment period and high cost in the traditional treatment process of palladium / carbon catalyst, and proposes a chemical reduction method to regenerate the deactivated palladium / carbon catalyst, so as to realize the purpose of continuous industrialized large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Get 100g from the palladium / carbon catalyst that catalyzes the deactivation of the halopyridine reaction, the moisture content is 40%~60%, first wash three times with 1500g deionized water, and after each cleaning, all use the centrifuge dehydration process (setting The rotating speed is 15000r / min, and the time is 3min). After washing with water, wash with 1200g of methanol three times, and remove methanol with a centrifuge after each cleaning (setting speed 15000r / min, time 3min). Then use 500g mass concentration of 25% hydrazine hydrate solution for reduction treatment for 1 hour, and the reduction temperature is 40°C. After the reduction is completed, the closed centrifuge is also suitable for centrifugal treatment (rotating speed 15000r / min, time 3min). After the reduction, wash with 500mL of methanol and 500g of deionized water respectively and centrifuge, and finally remove to drip without water, and the water content of the regenerated palladium / ca...

Embodiment 2

[0019] Embodiment 2: get 100g from the palladium / carbon catalyst that catalyzes the deactivation of halopyridine reaction, water content 40%~60%, wash with 1.5Kg deionized water three times earlier, all clean with centrifuge dehydration process ( Set the rotating speed to 15000r / min and the time to 3min). After washing with water, wash with 1.5L methanol three times, and use a centrifuge to remove methanol after each wash (set the rotation speed at 15000r / min for 3min). Then use 600g mass concentration of 30% formaldehyde solution for reduction treatment for 1.5 hours, and the reduction temperature is 30°C. After the reduction, the closed centrifuge is also suitable for centrifugal treatment (rotating speed 15000r / min, time 3min). After the reduction, wash with 500mL of methanol and 500g of deionized water respectively and centrifuge, and finally remove to drip without water, and the water content of the regenerated palladium / carbon catalyst is 50%.

[0020] The regenerated p...

Embodiment 3

[0021] Embodiment 3: get 100g from the palladium / carbon catalyst that catalyzes the deactivation of halopyridine reaction, water content 40%~60%, wash with 1.5Kg deionized water three times earlier, all clean with centrifuge dehydration process ( Set the rotating speed to 15000r / min and the time to 3min). After washing with water, wash with 1.5L methanol three times, and use a centrifuge to remove methanol after each wash (set the rotation speed at 15000r / min for 3min). Then use 500g mass concentration of 30% hydrazine hydrate solution for reduction treatment for 2 hours, and the reduction temperature is 43°C (±1°C). After the reduction, the closed centrifuge is also suitable for centrifugation (rotating speed 15000r / min, time 3min). After the reduction, wash with 500mL of methanol and 500g of deionized water respectively and centrifuge, and finally remove to drip without water, and the water content of the regenerated palladium / carbon catalyst is 50%.

[0022] Put the regene...

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PUM

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Abstract

The invention discloses a palladium / carbon catalyst regeneration and mechanical application method, which belongs to the technical field of catalyst recovery and mechanical application. In the method, firstly, the inactivated palladium / carbon catalyst is washed with deionized water for 2 to 3 times and then centrifuged, and the treated palladium / carbon catalyst is washed with methanol for 2 to 3 times and then centrifuged. After treatment, wash with methanol for 1-2 times, centrifuge to remove methanol after washing, and then wash with deionized water and then perform centrifugal dehydration; after treatment, the palladium / carbon catalyst can recover 90-95% of its activity. The invention has the characteristics of low processing cost, high regeneration and activation efficiency, clean and environment-friendly process, and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst recovery and mechanical application, and in particular relates to a regeneration and mechanical application method of a palladium / carbon catalyst. Background technique [0002] Palladium is a chemical element discovered by the British chemist Wollaston (1803) from platinum ore. It is an indispensable key material in high-tech fields such as aerospace and aviation, as well as in automobile manufacturing. Metal palladium has a good affinity for hydrogen. When metal palladium with a large amount of hydrogen adsorbed is heated to 40-50°C, most of the hydrogen on the surface will be released. Therefore, the main function of metal palladium is the catalytic hydrogenation of unsaturated hydrocarbons or carbonyl organic compounds, which can be used for hydrogenation reactions and dehydrogenation catalytic reactions. [0003] Palladium / carbon catalyst is usually made by loading metal palladium on activat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/96B01J23/44B01J38/52B01J38/48
Inventor 张千峰王猛陈向莹马森
Owner 淄博优新新材料科技有限公司
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