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A kind of preparation method with anti-sulfur poisoning effect palladium carbon catalyst

A palladium carbon catalyst and sulfur poisoning technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor loading capacity, low activity, poor dispersion, etc. Sulfur poisoning effect, effect of increasing adhesion firmness, effect of increasing activity

Active Publication Date: 2018-09-18
陕西瑞科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of preparation method that has anti-sulfur poisoning palladium-carbon catalyst, solves the problem that existing palladium-carbon catalyst has poor dispersion, low activity, poor loading capacity and easy poisoning

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Cleaning: soak the activated carbon material of the foam structure in an alkaline solution, soak for 0.5h, continue to heat up, boil for 1h, cool the boiled activated carbon foam naturally, and then wash it with deionized water twice. Dry in an oven at 80°C; among them, the alkaline solution is an aqueous solution of potassium hydroxide or sodium hydroxide with a concentration of 0.1 mol / L. The dried activated carbon foam is soaked in absolute ethanol, and then Heating and baking for 2 hours, the baking temperature is 100°C, the heating efficiency of the heating and baking is 10°C / min, and the washed activated carbon foam base material is obtained after cooling;

[0033] Step 2, the primary oxide layer: soak the activated carbon foam cleaned in step 1 in a titanium dioxide sol solution for 5 seconds, dry in an oven, and then sinter in a muffle furnace at 110°C, and cool naturally after sintering; after cooling The activated carbon foam was immersed in the titania s...

Embodiment 2

[0038] Step 1. Cleaning: Soak the activated carbon material with foam structure in alkaline solution, soak for 0.5h, continue to heat up, boil for 2h, cool the boiled activated carbon foam naturally, and then wash it with deionized water 3 times. Dry in an oven at 85°C; among them, the alkaline solution is an aqueous solution of potassium hydroxide or sodium hydroxide with a concentration of 0.3mol / L. The dried activated carbon foam is immersed in absolute ethanol, and then Heating and baking for 2.5 hours, the baking temperature is 95°C, the heating efficiency of the heating and baking is 20°C / min, and the washed activated carbon foam base material is obtained after cooling;

[0039] Step 2, first-level oxide layer: soak the activated carbon foam cleaned in step 1 in a titanium dioxide sol solution for 8 seconds, dry in an oven, and then sinter in a muffle furnace at 105°C. After sintering, cool naturally; after cooling The activated carbon foam was immersed in the titania sol s...

Embodiment 3

[0044] Step 1. Cleaning: Soak the activated carbon material with foam structure in alkaline solution, soak for 0.5h, continue to heat up, boil for 1.5h, cool the boiled activated carbon foam naturally, and then wash with deionized water for 3 times , Dried in an oven at 95°C; among them, the alkaline solution is an aqueous solution of potassium hydroxide or sodium hydroxide with a concentration of 0.5mol / L, and the dried activated carbon foam is immersed in absolute ethanol. Then heat and bake for 3 hours, the bake temperature is 90°C, the temperature rise efficiency of the temperature rise and bake is 15°C / min, and the washed activated carbon foam base material is obtained after cooling;

[0045] Step 2, first-level oxide layer: soak the activated carbon foam cleaned in step 1 in a titanium dioxide sol solution for 10 seconds, dry in an oven, and then sinter in a muffle furnace at 100°C, and cool naturally after sintering; after cooling The activated carbon foam was immersed in ...

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Abstract

The invention discloses a preparing method of a palladium-carbon catalyst resisting sulfur poisoning. The preparing method includes the steps that an activated carbon material of a foaming body structure is cleaned, first-level oxidizing layer treatment, catalytic layer treatment and protective layer treatment are sequentially carried out on the activated carbon material, and the finished palladium-carbon catalyst product is obtained through reduction treatment. A catalyst film is attached to a base material through the method of repeated dipping and lifting, the adhesion firmness is improved by the method of repeated baking, and the service life is greatly prolonged; titanium dioxide is adopted as the base material, activity and the sulfur poisoning resisting effect of the catalyst can be improved, and the regeneration effect of the catalyst is substantially improved; by adopting the activated carbon material of the foaming body structure, the contact area of the catalyst is increased, and the use ratio of the catalyst is improved.

Description

Technical field [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a preparation method of a palladium-carbon catalyst with anti-sulfur poisoning effect. Background technique [0002] Palladium on carbon is a new type of material made by loading metal palladium on activated carbon. It is mainly used for the catalytic hydrogenation of unsaturated hydrocarbons or aromatic hydrocarbons. It has the characteristics of high hydrogenation reduction, good selectivity, stable performance, low charging ratio in use, repeated application, easy recycling, etc. It is widely used in petrochemical industry, pharmaceutical industry, electronics industry, perfume industry, dye industry and other fine chemicals The hydrogenation reduction refining process. [0003] At present, the preparation of Pd / C catalyst basically adopts the impregnation method. First, the activated carbon is soaked in strong acid, then filtered, washed with water, and drie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44
CPCB01J23/44B01J35/004B01J37/024B01J37/08
Inventor 蔡万煜周淑雁李晓龙
Owner 陕西瑞科新材料股份有限公司
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