Preparation method of palladium hydroxide carbon carrier catalyst

A technology of palladium hydroxide carbon and catalyst is applied in the field of preparation of palladium hydroxide carbon carrier catalyst, which can solve the problems of high production cost and high active component loading, and achieve the effects of increasing the number of applications, avoiding agglomeration and prolonging the service life.

Pending Publication Date: 2021-12-10
陕西瑞科新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high loading of active components of Pearlman catalyst, its production cost is high, which inhibits its application to a certain extent.

Method used

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  • Preparation method of palladium hydroxide carbon carrier catalyst

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preparation example Construction

[0021] A kind of preparation method of palladium hydroxide carbon carrier catalyst of the present invention, specifically implement according to the following steps:

[0022] Step 1, adding palladium acetate to acetone to form a palladium solution;

[0023] The concentration of palladium acetate in acetone is 100-200g / L;

[0024] Step 2, using palladium solution to soak the activated carbon, and performing ultrasonic treatment, then filtering and drying after standing still, to obtain surface-coated activated carbon;

[0025] The ultrasonic treatment time is 10-20min, the ultrasonic frequency is 40-70kHz, the ultrasonic treatment temperature is not higher than 30°C (used to discharge the air bubbles in the activated carbon); the standing time is 20-30min; the drying temperature is 60-80°C;

[0026] Step 3, adding high-substituted hydroxypropyl cellulose into the methanol solution to obtain the methanol solution, and then injecting the methanol solution into the pores of the c...

Embodiment 1

[0034] A kind of preparation method of palladium hydroxide carbon carrier catalyst of the present invention, specifically implement according to the following steps:

[0035] Step 1, adding palladium acetate to acetone to form a palladium solution;

[0036] The concentration of palladium acetate in acetone is 100g / L;

[0037] Step 2, using palladium solution to soak the activated carbon, and performing ultrasonic treatment, then filtering and drying after standing still, to obtain surface-coated activated carbon;

[0038] The ultrasonic treatment time is 10min, the ultrasonic frequency is 40kHz, the ultrasonic treatment temperature is not higher than 30°C; the standing time is 20min; the drying temperature is 60°C;

[0039] Step 3: Add high-substituted hydroxypropyl cellulose into the methanol solution to obtain methanol solution, then inject the methanol solution into the pores of the coated activated carbon by soaking and pouring, and dry at a constant temperature, and repe...

Embodiment 2

[0046] A kind of preparation method of palladium hydroxide carbon carrier catalyst of the present invention, specifically implement according to the following steps:

[0047] Step 1, adding palladium acetate to acetone to form a palladium solution;

[0048] The concentration of palladium acetate in acetone is 120g / L;

[0049] Step 2, using palladium solution to soak the activated carbon, and performing ultrasonic treatment, then filtering and drying after standing still, to obtain surface-coated activated carbon;

[0050] The ultrasonic treatment time is 15min, the ultrasonic frequency is 60kHz, the ultrasonic treatment temperature is not higher than 30°C; the standing time is 25min; the drying temperature is 70°C;

[0051] Step 3: Add high-substituted hydroxypropyl cellulose into the methanol solution to obtain methanol solution, then inject the methanol solution into the pores of the coated activated carbon by soaking and pouring, and dry at a constant temperature. clogged...

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Abstract

The invention discloses a preparation method of a palladium hydroxide carbon carrier catalyst. The method specifically comprises the following steps: firstly, adding palladium acetate into acetone to form a palladium solution, soaking activated carbon with the palladium solution, and carrying out ultrasonic treatment, filtration and drying; adding high-substituted hydroxy propyl cellulose into a methanol solution, injecting the methanol solution into pores of the coated activated carbon by adopting a soaking and filling method, drying, repeatedly filling to obtain activated carbon with blocked pores, soaking in a sodium hydroxide solution, continuously stirring, drying, soaking the above in methanol, drying, repeatedly soaking with sodium hydroxide and methanol for 3-5 times, cleaning and drying to obtain the palladium hydroxide carbon carrier catalyst. According to the method disclosed by the invention, through multiple reactions from outside to inside, high-substituted hydroxy propyl cellulose filled in the pores of the activated carbon can be fully dissolved out, and the exposed palladium is converted into palladium hydroxide step by step, so that the palladium can be uniformly distributed on the inner and outer surfaces of the carbon carrier, and uniform active metal component distribution is formed.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of noble metal catalysts, and in particular relates to a preparation method of palladium hydroxide carbon-supported catalysts. Background technique [0002] Palladium hydroxide on carbon is widely used in the fields of pharmaceutical organic synthesis and chemical industry, mainly for catalytic hydrogenation, including debenzylation, hydrogenation of olefins, reduction of benzoic acid, oxidation of aldehydes, etc. Since William M.Pearlman used the ion exchange method to prepare palladium hydroxide carbon in 1967, it has attracted widespread attention because of its excellent catalytic activity, but the activity of existing palladium hydroxide carbon is still low. [0003] In the field of medicine and fine chemical industry, protection and deprotection is a relatively common organic synthesis strategy. When carrying out multi-step organic synthesis of multifunctional substrates, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/10
CPCB01J23/44B01J35/1004
Inventor 周淑雁李伟峰廖清玉
Owner 陕西瑞科新材料股份有限公司
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