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Preparation method for high-selectivity dopamine platinum carbon catalyst

A dopamine platinum and carbon catalyst technology, applied in the field of catalysis, can solve the problems of poor selectivity, short service life, low activity, etc., and achieve the effects of uniform distribution, long service life and high activity

Inactive Publication Date: 2015-07-22
杭州创培信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of highly selective dopamine platinum carbon catalyst. The present invention not only solves the problems of low activity, poor selectivity and short service life of the traditional precipitation method and impregnation method, but also maintains a method similar to that of colloidal platinum catalyst. particle size distribution and particle size

Method used

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Embodiment 1

[0029] The present invention provides a method for preparing a highly selective dopamine platinum-carbon catalyst, which is characterized in that the steps of the preparation method are as follows:

[0030] 1) Preparation of platinum precursor solution

[0031] Accurately weigh 394.74g of chloroplatinic acid (the platinum content of chloroplatinic acid is 38.0%), add deionized water to dilute platinum to 50g / L, and add 150g of castor oil (lubricant) to the chloroplatinic acid solution, and use under stirring Na2CO with a mass fraction of 5% 3 Adjust the pH of the solution to 1 to prepare a platinum precursor solution;

[0032] 2) Preparation of dopamine precursor solution

[0033] The raw materials used are absolute ethanol, dopamine, sodium hydroxide, deionized water, and polyvinylpyrrolidone. The step is to vigorously stir the absolute ethanol and add dopamine dropwise to obtain solution A, and combine water, ethanol, sodium hydroxide, and poly The vinylpyrrolidone is uniforml...

Embodiment 2

[0045] The present invention provides a method for preparing a highly selective dopamine platinum-carbon catalyst, which is characterized in that the steps of the preparation method are as follows:

[0046] 1) Preparation of platinum precursor solution

[0047] Accurately weigh 394.74g of chloroplatinic acid (the platinum content in chloroplatinic acid is 38.0%), add deionized water to dilute the platinum to 30g / L, and add 300g of fatty acid amide (lubricant) to the chloroplatinic acid solution, under stirring, Use 15% NaHCO 3 Adjust the pH of the solution to 2.5 to prepare a platinum precursor solution;

[0048] 2) Preparation of dopamine precursor solution

[0049] The raw materials used are absolute ethanol, dopamine, sodium hydroxide, deionized water, and triethylhexyl phosphoric acid. The step is to vigorously stir the absolute ethanol, and add dopamine dropwise to obtain solution A. Combine water, ethanol and sodium hydroxide. , Triethylhexyl phosphoric acid is uniformly m...

Embodiment 3

[0061] The present invention provides a method for preparing a highly selective dopamine platinum-carbon catalyst, which is characterized in that the steps of the preparation method are as follows:

[0062] 1) Preparation of platinum precursor solution

[0063] Accurately weigh 394.74g of chloroplatinic acid (the platinum content in chloroplatinic acid is 38.0%), add deionized water to dilute the platinum to 30g / L, and add 300g of fatty acid amide (lubricant) to the chloroplatinic acid solution, under stirring, Use 15% NaHCO 3 Adjust the pH of the solution to 2.5 to prepare a platinum precursor solution;

[0064] 2) Preparation of dopamine precursor solution

[0065] The raw materials used are absolute ethanol, dopamine, sodium hydroxide, deionized water, and sodium lauryl sulfate. The steps are to vigorously stir the absolute ethanol and add dopamine dropwise to obtain solution A. Sodium and sodium lauryl sulfate are uniformly mixed to obtain solution B; under vigorous stirring...

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Abstract

The invention discloses a preparation method for a high-selectivity dopamine platinum carbon catalyst; the dopamine platinum carbon catalyst is prepared with a dopamine precursor solution and an activated carbon-doped platinum precursor solution as raw materials. The preparation method not only solves the problems that a traditional precipitation method and a traditional impregnation method are low in activity, poor in selectivity, short in service life and the like, and also keeps the particle size distribution and particle size similar to those of a colloidal platinum catalyst.

Description

Technical field [0001] The invention belongs to the technical field of catalysis, and specifically relates to a preparation method of a highly selective dopamine platinum carbon catalyst. Background technique [0002] Platinum group metal catalysts have good catalytic performance and occupy an extremely important position in petrochemical and organic synthesis. They are widely used in hydrogenation, dehydrogenation, oxidation, reduction, isomerization, aromatization, cracking and other reactions. The catalytic performance of the catalyst is not only dependent on the composition and content of the catalyst, but also closely related to the preparation method and process conditions of the catalyst. The same raw material, the same composition and content, different preparation methods, and the activity and thermal stability of the catalyst There may be a big difference. Therefore, it is of great significance to study the preparation method of highly selective platinum-carbon catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22
Inventor 苏琳郭小川
Owner 杭州创培信息科技有限公司
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