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Preparation method of high-activity palladium carbon hydroxide based on microreactor

A technology of palladium hydroxide carbon and micro-reactor, which is applied in the field of preparation of highly active palladium hydroxide carbon, can solve the problems of uneven mixing, uneven heating, weakening of catalyst activity, etc., and achieve uniform catalyst particles, high catalytic activity, The effect of solving mass and heat transfer problems

Inactive Publication Date: 2018-11-23
南京东焱氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the scale-up test is carried out in the traditional kettle-type container, there are problems of uneven mixing and uneven heating, which will lead to uneven particle size distribution of the synthesized catalyst active particles, resulting in weakened catalyst activity

Method used

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  • Preparation method of high-activity palladium carbon hydroxide based on microreactor
  • Preparation method of high-activity palladium carbon hydroxide based on microreactor
  • Preparation method of high-activity palladium carbon hydroxide based on microreactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method based on the high activity palladium hydroxide carbon of microreactor, adopts microreactor, comprises the following steps:

[0028] (1) 5.0g of carbon black particles were pulverized to obtain carbon black powder, and 500mL of deionized water was added, which was then ultrasonically dispersed to obtain a carbon black slurry;

[0029] (2) dissolving the precipitant sodium carbonate in water to obtain a precipitant solution; ultrasonically dissolving the palladium salt in water to obtain a palladium salt solution;

[0030] (3) Use one of the syringe pump, plunger pump, diaphragm pump and peristaltic pump to inject the carbon black slurry and the precipitant solution into the microreactor at 2.5mL / min, and use a constant temperature oil bath to control The temperature is in the range of 50-100°C;

[0031] (4) Using one of a syringe pump, a plunger pump, a diaphragm pump and a peristaltic pump, inject the palladium salt solution into the micror...

Embodiment 2

[0035] A kind of preparation method based on the high activity palladium hydroxide carbon of microreactor, adopts microreactor, comprises the following steps:

[0036] (1) 5.5g of carbon black particles were pulverized to obtain carbon black powder, and 1000mL of deionized water was added, and then ultrasonically dispersed to obtain carbon black slurry;

[0037] (2) dissolving the precipitating agent sodium hydroxide in water to obtain an intermediate solution; ultrasonically dissolving the palladium salt in water to obtain a palladium salt solution;

[0038] (3) Utilize a kind of in syringe pump, plunger pump, diaphragm pump and peristaltic pump, inject carbon black slurry and palladium salt solution in the microreactor with 20mL / min respectively, utilize constant temperature oil bath to control temperature at 100°C;

[0039] (4) Using one of the syringe pump, plunger pump, diaphragm pump and peristaltic pump, inject the precipitant into the microreactor at 40mL / min, and use...

Embodiment 3

[0043] A kind of preparation method based on the high activity palladium hydroxide carbon of microreactor, adopts microreactor, comprises the following steps:

[0044] (1) 5.2g of carbon black particles were pulverized to obtain carbon black powder, and 800mL of deionized water was added, which was then ultrasonically dispersed to obtain a carbon black slurry;

[0045] (2) dissolving the precipitant sodium hydroxide in water to obtain an intermediate solution; ultrasonically dissolving the palladium salt in water to obtain a palladium salt solution;

[0046] (3) Using one of the syringe pump, plunger pump, diaphragm pump and peristaltic pump, inject the carbon black slurry and the precipitant solution or the carbon black slurry and the palladium salt solution into the microreactor at 10mL / min respectively In the process, use a constant temperature oil bath to control the temperature within the range of 80°C;

[0047] (4) Using one of the syringe pump, plunger pump, diaphragm ...

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Abstract

The invention discloses a preparation method of high-activity palladium carbon hydroxide based on a microreactor. Te preparation method adopts the microreactor and comprises the following steps: (1) smashing carbon black particles, thus obtaining carbon black powder; addding deionized water, and then carrying out ultrasonic dispersion, thus obtaining carbon black slurry; (2) dissolving a precipitator into water, thus obtaining a precipitator solution; ultrasonically dissolving palladium salt into the water, thus obtaining a palladium salt solution; (3) injecting the carbon black slurry and theprecipitator solution into the microreactor by utilizing a pump machine; (4) injecting the palladium salt solution into the microreactor by utilizing the pump machine; (5) fully mixing the reactantsin the microreactor, and fully reacting, thus obtaining a product. A catalyst prepared by the invention is uniform in granularity and high in catalytic activity, the problems of mass transfer and heattransfer during large-scale production of a traditional method can be solved, and the preparation method is suitable for batch production of the catalyst.

Description

technical field [0001] The invention relates to a method for preparing high-activity palladium hydroxide carbon based on a microreactor. Background technique [0002] Nanoscale noble metal catalysts are widely used in the chemical industry, and the market demand for high-performance noble metal catalysts is also increasing. When the scale-up test is carried out in a traditional kettle-type container, there are problems of uneven mixing and uneven heating, which will lead to uneven particle size distribution of the synthesized catalyst active particles, resulting in weakened catalyst activity. However, the catalyst active particles obtained by microreactor technology have small particle size, uniform particle size distribution, high catalyst activity, and can solve the problem of mass transfer and heat transfer in the amplification process. [0003] Therefore, need a kind of preparation method of the high activity palladium hydroxide carbon based on microreactor to solve the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44
Inventor 顾军吴威
Owner 南京东焱氢能源科技有限公司
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