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Preparation method of catalyst of carbon dioxide hydrogenation methanol synthesis

A technology for synthesizing methanol and carbon dioxide, which is applied in the preparation of organic compounds, catalyst activation/preparation, preparation of hydroxyl compounds, etc., can solve the problems of insufficient uniform dispersion of active components, low methanol-selective carbon dioxide conversion rate, etc. The effect of easy industrialization

Inactive Publication Date: 2012-06-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a catalyst preparation method based on the hydrogenation of carbon dioxide to synthesize methanol, adding a dispersant on the basis of the traditional co-precipitation method to prepare the catalyst, so as to solve the problems of insufficient uniform dispersion of active components, methanol selectivity and carbon dioxide in methanol catalyst products. Improve the activity of methanol catalyst products to solve the problem of low conversion rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the preparation method step of carbon dioxide hydrogenation synthesis methanol catalyst of the present invention is as follows:

[0018] (1) Weigh Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 , adding deionized water to form a mixed solution with a concentration of 1.0mol / L;

[0019] (2) At a reaction temperature of 70°C, titrate the above solution into Na with a concentration of 0.1mol / L 2 CO 3 In the solution, the pH of the solution was adjusted to be 7. After the titration was completed, the mixed solution was maintained at the reaction temperature to continue stirring for 1 hour, and then left to stand at the reaction temperature for 1 hour to age the solution to obtain a solid precipitate;

[0020] (3) Filter the solid precipitate and wash it with deionized water for 5 times, then dry the solid precipitate at 110°C for 12 hours, then roast it at 500°C for 5 hours, cool it down naturally, and granulate it to obtain the catalyst Cat0 of 20-40 mesh...

Embodiment 2

[0021] Embodiment 2: the preparation method steps of carbon dioxide hydrogenation synthesis methanol catalyst of the present invention are as follows:

[0022] (1) Weigh Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 , add deionized water to make a mixed solution with a concentration of 0.1mol / L, then add polyvinylpyrrolidone (PVP) of 2% of the total mass of the mixed solution to completely dissolve and mix;

[0023] (2) Under the condition that the reaction temperature is 50°C, titrate the above solution into a concentration of 1.0mol / L Na 2 CO 3 In the solution, the pH of the solution was adjusted to be 7.5. After the titration was completed, the mixed solution was maintained at the reaction temperature to continue stirring for 1.5 hours, and then left to stand at the reaction temperature for 0.5 hours to age the solution to obtain a solid precipitate;

[0024] (3) Filter the solid precipitate and wash it with deionized water for 6 times, then dry the solid precipitate a...

Embodiment 3

[0025] Embodiment 3: the preparation method step of carbon dioxide hydrogenation synthesis methanol catalyst of the present invention is as follows:

[0026] (1) Weigh Cu(NO 3 ) 2 , Zn(NO 3 ) 2 and Zr(NO 3 ) 4 , add deionized water to make a mixed solution with a concentration of 0.8mol / L, then add polyvinylpyrrolidone (PVP) with a total mass of 25% of the mixed solution to completely dissolve and mix;

[0027] (2) Under the condition that the reaction temperature is 60°C, titrate the above solution into a concentration of 1.2mol / L Na 2 CO 3 In the solution, the pH of the solution was adjusted to be 8. After the titration was completed, the mixed solution was maintained at the reaction temperature and continued to stir for 2 hours, and then left at the reaction temperature for 1.5 hours to age the solution to obtain a solid precipitate;

[0028] (3) Filter the solid precipitate and wash it with deionized water for 7 times, then dry the solid precipitate at 120°C for 1...

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Abstract

The invention provides a preparation method of catalyst of carbon dioxide hydrogenation methanol synthesis, which belongs to the technical field of preparation of catalyst. The preparation method includes adding dispersing agent in Cu(NO3)2, Zn(NO3)2 and Zr(NO3)4 so as to prepare mixed liquor, then titrating the mixed liquor into Na2CO3 liquor, adjusting the pH (potential of hydrogen) of the liquor to range from 7 to 8, allowing the liquor to stand after sufficient reaction so that the liquor is aged to obtain solid precipitate, and roasting the solid precipitate to obtain methanol catalyst after the roasted solid precipitate is cooled naturally. On the basis of preparing catalyst by a coprecipitation method, the dispersing agent is added so as to prepare the methanol catalyst. The preparation method has the advantages that the preparation method is simple in technological process and easy to realize industrialization, carbon dioxide conversion rate and methanol selectivity of products are high, and the like. The obtained catalyst is applicable to carbon dioxide hydrogenation catalytic reaction under medium and low pressure.

Description

technical field [0001] The invention relates to a method for synthesizing a methanol catalyst, in particular to a method for preparing a methanol catalyst used in carbon dioxide hydrogenation and low-pressure synthesis of methanol, and belongs to the technical field of catalyst preparation. Background technique [0002] Methanol is an extremely important chemical raw material, widely used in organic synthesis, medicine, fuel, dyestuff, its output is second only to synthetic ammonia and ethylene. Methanol is not only C 1 The basic substance of the chemical industry, hundreds of chemical products can be produced from methanol, and it is also an important potential substitute clean fuel. With the change of energy structure, methanol will play a pivotal role in the future society. [0003] In the 1960s, the low-pressure methanol synthesis copper-based catalyst developed by the British ICI company promoted the rapid development of the methanol industry. The medium and low pres...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J37/03C07C31/04C07C29/154
CPCY02P20/52
Inventor 高文桂张逢杰王华刘文艳
Owner KUNMING UNIV OF SCI & TECH
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