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Preparation method of methanol synthesis catalyst

A technology for synthesizing methanol and catalysts, applied in the preparation of organic compounds, catalysts for physical/chemical processes, chemical instruments and methods, etc., to achieve high activity, increased activity, and good thermal stability

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the key to improving the activity and service life of methanol synthesis catalysts is to increase the specific surface area of ​​the catalyst and to distribute the active component copper and cocatalyst zinc more evenly, which are not covered by the above patents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 500mL water in dissolving tank 1, add 90gZn (NO 3 ) 2 ·6H 2 Dissolve O, prepare acidic working solution A, add 500mL water into the dissolving tank 2, then add 66 grams of sodium metaaluminate to dissolve, prepare alkaline working solution B, add 450mL water into the reaction tank, and the temperature rises to 65°C. Under stirring, solution A, solution B and CO 2 And flow into the reaction tank to form a gel, CO 2 The concentration is 80v%, the gelling reaction temperature is 65°C, the gelling time is 1 hour, and the pH value of the gelling slurry is controlled to be 7.6±0.2. CO was added during gelation 2 The total amount of gas and the Al in alkaline working solution B 2 o 3 The molar ratio was 4.5. Under the situation of agitation, start aging, add basic copper carbonate (Cu 2 (OH) 2 CO 3 ) 128 grams, when aging, the pH is 8.2 ± 0.2, the temperature is 75 ° C, aging for 2 hours, after the material is filtered, washed 3 times with clean water, the filter...

Embodiment 2

[0029] Add 500mL water in dissolving tank 1, add 86gZn (NO 3 ) 2 ·6H 2 Dissolve O, prepare acidic working solution A, add 500mL water into the dissolving tank 2, then add 28 grams of sodium metaaluminate to dissolve, prepare alkaline working solution B, add 450mL water into the reaction tank, and the temperature rises to 70°C. Under stirring, solution A, solution B and CO 2 And flow into the reaction tank to form a gel, CO 2 The concentration is 85v%, the gelling reaction temperature is 70°C, the gelling time is 1.5 hours, and the pH value of the gelling slurry is controlled to be 7.2±0.2. CO was added during gelation 2 The total amount of gas and the Al in alkaline working solution B 2 o 3 The molar ratio was 3.2. Under the situation of agitation, start aging, add basic copper carbonate (Cu 2 (OH) 2 CO 3 ) 188 grams, when aging, the pH is 7.8 ± 0.2, the temperature is 78 ° C, aging for 3 hours, after filtering the material, washing 4 times with clean water, soaking ...

Embodiment 3

[0032] Add 500mL water in dissolving tank 1, add 88gZn (NO 3 ) 2 ·6H 2 Dissolve O, prepare acidic working solution A, add 500mL water into the dissolving tank 2, then add 41 grams of sodium metaaluminate to dissolve, prepare alkaline working solution B, add 600mL water into the reaction tank, and the temperature rises to 75°C. Under stirring, solution A, solution B and CO 2 And flow into the reaction tank to form a gel, CO 2 The concentration is 90v%, the gelling reaction temperature is 75°C, the gelling time is 2 hours, and the pH value of the gelling slurry is controlled to be 8.2±0.2. CO was added during gelation 2 The total amount of gas and the Al in alkaline working solution B 2 o 3 The molar ratio was 3.8. Under the situation of agitation, start aging, add basic copper carbonate (Cu 2 (OH) 2 CO 3 ) 150 grams, when aging, the pH is 8.4 ± 0.2, the temperature is 80 ° C, aging for 2 hours, after filtering the material, washing 5 times with clean water, soaking th...

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Abstract

The invention discloses a preparation method of a methanol synthesis catalyst. The method comprises the steps of adding a soluble salt solution of zinc, a sodium metaaluminate solution and CO2 gas in a parallel flow mode and gelling, aging under the condition of stirring, adding basic copper carbonate while aging, soaking the product in organic solvents after washing and filtration, and then forming to prepare the methanol synthesis catalyst. The method has the beneficial effects of improving the physical and chemical properties of the catalyst, increasing the specific surface area of the catalyst, improving the synergism between the main active metal component copper and the cocatalyst metal component zinc, improving the dispersibility of an active phase, and improving the activity and stability of the catalyst.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for synthesizing methanol, in particular to a method for preparing a catalyst for synthesizing methanol with high activity and good heat resistance. Background technique [0002] Methanol is an extremely important chemical raw material, which is widely used in organic synthesis, dyes, fuels, medicines, coatings and national defense industries. Its output ranks third in the world after synthetic ammonia and ethylene. In recent years, methanol demand and production capacity have been increasing Industrial development and continued growth. [0003] In industry, methanol is generally used to contain H 2 , CO, CO 2 Syngas is produced under certain conditions of pressure, temperature and presence of catalysts. At present, medium and low pressure gas phase methods are widely used in the world to synthesize methanol, and the catalysts used are basically mixed oxides of copper, zinc and aluminum. Sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80C07C31/04C07C29/154
CPCY02P20/52
Inventor 王海涛刘东香徐学军冯小萍王继锋
Owner CHINA PETROLEUM & CHEM CORP
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