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Regeneration method of carbon-supported noble metal catalyst

A noble metal catalyst and noble metal technology, applied in the direction of catalyst regeneration/reactivation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of increasing the cost of catalyst use

Active Publication Date: 2018-09-07
JIANGSU SINORGCHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide a regeneration method for carbon-supported noble metal catalysts to solve the technical problem in the prior art that the performance degradation of carbon-supported noble metal catalysts during repeated use will sharply increase the cost of catalyst use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 100g of the catalyst to be regenerated, the platinum sulfide / carbon catalyst with an original precious metal loading of 5wt% (calculated as elemental platinum), and prepare it with 800ml of methanol to make a slurry at 35°C, add 3ml of n-propylene mercaptan dropwise (that is, the molar ratio of the sulfide to the original loading of the noble metal in the carbon-supported noble metal catalyst is 1.5:1), stirred for 4 hours; filtered, and the filter cake was vacuum-dried at 100°C to obtain the resulfurized carbon-supported platinum sulfide catalyst. In a 500ml stainless steel autoclave, add platinum sulfide / carbon catalyst after 0.8g regeneration, 73.6g RT base and 200ml MIBK; close the reactor, replace the air in the reactor with nitrogen for three times, then replace it with hydrogen three times; The temperature was raised to 150°C, the hydrogen pressure was 2MPa, stirring was started, the stirring rate was 900r / min, and the reaction was carried out for 5h; the re...

Embodiment 2

[0030] Weigh 100g of the catalyst to be regenerated, the palladium sulfide / carbon catalyst with the original precious metal loading of 2wt% (calculated as elemental palladium), and prepare it with 1000ml of ethanol to make a slurry at 50°C, add 1ml of diphenylsulfide dropwise Ether (that is, the molar ratio of the sulfide to the original loading of the noble metal in the carbon-supported noble metal catalyst is 0.27:1), stirred for 3 hours; filtered, and the filter cake was vacuum-dried at 110°C to obtain the resulfurized carbon-supported palladium sulfide catalyst. In a 500ml stainless steel autoclave, add 1g of regenerated palladium sulfide / carbon catalyst, 73.6g RT base and 200ml MIBK; close the reactor, replace the air in the reactor with nitrogen three times, then replace it with hydrogen three times; Raise to 150°C, hydrogen pressure is 2MPa, start stirring, the stirring rate is 900r / min, react for 5h; The conversion rate of the company is 99.8%, the selectivity of rubber ...

Embodiment 3

[0032] Weigh 100g of the catalyst to be regenerated, the platinum sulfide / carbon catalyst with an original precious metal loading of 4wt% (calculated as elemental platinum), and prepare it with 2000ml of water to make a slurry at 70°C, and slowly bubble it into 4L of sulfurized Hydrogen gas (that is, the molar ratio of the sulfide to the original loading of the noble metal in the carbon-supported noble metal catalyst is 8.7:1), stirred for 3 hours; filtered, and the filter cake was vacuum-dried at 110°C to obtain the resulfurized carbon-supported platinum sulfide catalyst . In a 500ml stainless steel autoclave, add 1g of regenerated platinum sulfide / carbon catalyst, 55.2g RT base and 187ml MIBK; close the reactor, replace the air in the reactor with nitrogen for three times, then replace it with hydrogen three times; Raise to 200°C, hydrogen pressure is 3MPa, start stirring, the stirring rate is 900r / min, react for 4h; The conversion rate of the company is 98.2%, the selectiv...

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PUM

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Abstract

The invention discloses a regeneration method for a charcoal-supported noble metal catalyst. The regeneration method comprises the following steps: preparing slurry from a to-be-regenerated charcoal-supported noble metal catalyst, sulfide and a solvent and stirring and filtering the slurry so as to obtain a filter cake; and drying the filter cake so as to obtain a regenerated charcoal-supported noble metal catalyst; wherein a mol ratio of the sulfide to initially loaded noble metal in the to-be-regenerated charcoal-supported noble metal catalyst is 0.05-10: 1. With the method provided by the invention, the performance of the noble metal loaded catalyst can be effectively recovered through sulfuration of a used charcoal-supported noble metal catalyst, so use cost for the catalyst is reduced, and application of the charcoal-supported noble metal catalyst in the industry is promoted.

Description

technical field [0001] The invention relates to the technical field of catalyst regeneration, in particular to a regeneration method for a carbon-supported noble metal catalyst. Background technique [0002] Precious metal catalysts such as platinum or palladium supported on carbon have the characteristics of high activity, easy separation and recovery, and are widely used in various hydrogenation reactions. However, when the selective hydrogenation reduction of substances with multiple reducing functional groups is carried out, too high catalytic activity often leads to excessive hydrogenation of the reaction, which cannot meet the requirement of high selectivity. Sulfidation treatment of noble metal catalysts is an effective way to improve the selectivity of noble metal catalysts. [0003] The sulfurized palladium / carbon or platinum / carbon catalyst is suitable for the preparation of rubber antioxidant 4020 by highly selective catalytic reduction alkylation of MIBK and RT ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/96B01J23/42B01J23/44B01J38/50B01J38/04
Inventor 张群峰李小年陈新民丰枫马磊卢春山李春生
Owner JIANGSU SINORGCHEM TECH CO LTD
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