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Preparation method of palladium carbon catalyst

A technology of palladium carbon catalyst and preparation steps, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of uneven distribution of palladium metal, complex preparation methods, Easy deactivation and other problems, to achieve the effect of high surface activity, simple method, and less pollutants

Inactive Publication Date: 2019-05-21
郴州万墨环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide the preparation of palladium carbon catalyst with simple preparation method and high catalytic effect in view of the complex preparation method in the prior art, many impurities, easy deactivation, and uneven distribution of palladium metal on the surface of the carbon carrier method

Method used

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  • Preparation method of palladium carbon catalyst
  • Preparation method of palladium carbon catalyst
  • Preparation method of palladium carbon catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] S1. Place commercially available activated carbon in 0.5wt.% nitric acid solution, heat at 100°C for 8h, wash with water, and dry for later use;

[0024] S2. dissolving: palladium is dissolved with hydrochloric acid, makes the palladium salt solution of 4mol / L;

[0025] S3. Impregnation: immerse 10g of activated carbon in 60g of palladium salt solution and stir for 10min;

[0026] S4. Precipitation: Slowly add 40mL of 16wt.% sodium hydroxide solution to the activated carbon and palladium salt solution, and react at room temperature for 120min;

[0027] S5. Reduction: the activated carbon in step S3 was mixed with hydrogen and reduced at 90°C for 90.min, washed with water after reduction, and dried at 105°C for 4 hours to obtain a palladium carbon catalyst.

Embodiment 2

[0029] The steps of this embodiment are the same as those of Embodiment 1, the difference being that the palladium salt concentration is 3 mol / L.

[0030] Embodiment 3~7 The step of this embodiment is identical with embodiment 1, and its difference is as table 1:

[0031] Table 1

[0032]

[0033]

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Abstract

The invention discloses a preparation method of a palladium carbon catalyst. The preparation method of the palladium carbon catalyst comprises the following steps: dipping pretreated activated carboninto a palladium salt solution, adsorbing the palladium solution by the activated carbon, forming precipitate of palladium hydroxide through an alkali solution and the palladium salt solution and attaching the precipitate to the activated carbon. Through accurate control over various factors such as the palladium salt concentration, the alkali liquid concentration, activated carbon dipping and thelike, the palladium carbon catalyst with high palladium metal dispersity, high microcrystal content and high use properties of high surface activity and long service life is prepared; furthermore, the method is simple, pollutants are few and the recovery rate is high.

Description

technical field [0001] The invention relates to the technical field of palladium-carbon catalysts, and more specifically, to a preparation method of palladium-carbon catalysts. Background technique [0002] Palladium (Pd)-based catalysts are versatile and well-performing general-purpose catalysts that can be used for hydrocarbon-based conversions, such as catalytic hydrogenation and catalytic cracking. Palladium-based catalysts have high catalytic activity and selectivity, and are generally used in the form of fine-grained palladium-carbon. The palladium carbon catalyst is to support the precious metal palladium on the activated carbon, the active palladium is distributed on the surface of the carrier carbon, and the palladium crystals inside help to improve the catalyst's active agent life. The pros and cons of palladium-carbon catalysts are determined by catalyst activity, selectivity, and service life. In the preparation of palladium-carbon in the prior art, the preparat...

Claims

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Application Information

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IPC IPC(8): B01J23/42
Inventor 欧传高许林忠谢爱国
Owner 郴州万墨环保科技有限公司
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