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Process for preparing synthetic methanol catalyst

A technology for synthesizing methanol and catalysts, which can be used in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems of short life, poor thermal stability, and many by-products. , to achieve the effect of easy operation control, large specific surface area, and product quality control

Inactive Publication Date: 2008-12-24
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of methanol mostly adopts the medium and low pressure method, but the catalyst for the synthesis of methanol by the medium and low pressure method has many disadvantages: poor thermal stability, short life, and many by-products

Method used

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  • Process for preparing synthetic methanol catalyst

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Experimental program
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Effect test

Embodiment 1

[0023] Weigh 182gCu(NO 3 ) 2 ·3H 2 O and 75gZn(NO 3 ) 2 ·6H 2 O was dissolved in 850mL deionized water to make solution A, heated to 60-85°C; weigh 106gNa 2 CO 3 Dissolve in 1000mL deionized water to make solution B, heat to 60-85°C; under stirring conditions, add solution A to solution B, control the end point pH to 7.0-7.5, continue stirring for 30 minutes, the color of the precipitate changes from blue to It is blue-green, keep the precipitation temperature at 60-85°C, let it stand for 2-3 hours, add 10g of Al to the prepared slurry 2 o 3 , and then filtered and washed to Na + content of ≤0.035% (w / w), the obtained filter cake is dried at 100-120 ° C, and then roasted at 320 ° C for 4 hours, and the roasted material is added with an appropriate amount of graphite and water and pressed into a tablet, which is a synthetic methanol catalyst sample. The sample number is a.

Embodiment 2

[0025] Weigh 182gCu(NO 3 ) 2 ·3H 2 O, 75gZn(NO 3 ) 2 ·6H 2 O and 75gAl(NO 3 ) 3 9H 2 O was dissolved in 850mL deionized water to prepare solution A, heated to 60-85°C; weighed 128gNa 2 CO 3 Dissolve in 1000mL deionized water to make solution B, heat to 60-85°C; under stirring conditions, add solution A to solution B, control the end point pH to 7.0-7.5, continue stirring for 30 minutes, the color of the precipitate changes from blue to It is blue-green. Keep the precipitation temperature at 60-85°C and let it stand for 2-3 hours. The prepared slurry is filtered and washed to Na + content of ≤0.035% (w / w), the obtained filter cake is dried at 100-120°C, and then roasted at 320°C for 4 hours, and the calcined material is added with appropriate amount of graphite and water, and pressed into tablets, which is the catalyst for methanol synthesis sample. The sample number is b.

Embodiment 3

[0027] Weigh 121gCu(NO 3 ) 2 ·3H 2 O and 75gZn(NO 3 ) 2 ·6H 2 O was dissolved in 850mL deionized water to make solution A, heated to 60-85°C; weighed 60g Cu(NO 3 ) 2 ·3H 2 O and 75gAl(NO 3 ) 3 9H 2 O was dissolved in 400mL deionized water to make solution B, and heated to 60-85°C. Weigh 128gNa 2 CO 3 Dissolve in 1200mL deionized water to make solution C, heat to 60-85°C; divide solution C into two parts C1 and C2, solution C1 is 800mL, and solution C2 is 400mL. Under the condition of stirring, add solution A to solution C1, control the end point pH to 7.0-7.5, continue stirring for 30 minutes, the color of the precipitate changes from blue to blue-green, and keep the precipitation temperature at 60-85°C to obtain slurry D; Add solution B to solution C2, control the end point pH to 7.0-7.5, and keep the precipitation temperature at 60-85°C to obtain slurry E. Then mix and stir the slurry D and E, and let it stand for 2 to 3 hours. The prepared mixed slurry is filt...

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Abstract

The present invention provides a preparation method of methanol synthesis catalyst. The catalyst has the preparation technical process as follows: firstly, copper-zinc coprecipitate is prepared; secondly, zinc-aluminium coprecipitate with a spinel structure is prepared; thirdly, copper-aluminium coprecipitate is prepared; then three coprecipitates are mixed and aged and then are washed, dried and calcined; graphite is added into calcined material to be tabletted into the methanol synthesis catalyst. In weight percentage, the catalyst prepared by the present invention consists of 25 percent to 65 percent of CuO, 15 percent to 45 percent of ZnO and 5 percent to 15 percent of Al2O3. The activity and the heat resistance of the catalyst prepared by the present invention are better than that of the catalyst prepared by the prior technical production method.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a catalyst for synthesizing methanol. Background technique [0002] Methanol is an important organic chemical raw material, and its output is second only to synthetic ammonia and ethylene, ranking third in the world. With the development of the methanol market, the production and consumption of methanol have gradually increased. The production of methanol mostly adopts the medium and low pressure method, but the catalyst for the synthesis of methanol by the medium and low pressure method has many disadvantages: poor thermal stability, short life, and many by-products. Most of the research on catalyst preparation focuses on the improvement and optimization of the co-precipitation preparation process, adding the fourth component to improve the activity and selectivity of the catalyst, improving the carrier, improving the thermal stability of the catalyst,...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C31/04
CPCY02P20/52
Inventor 高俊文张勇杜彩霞王亚利李选志曹小玲
Owner XIAN ORIGIN CHEM TECH
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