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Preparation method for catalyst containing copper and zinc

A copper catalyst and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., to achieve high activity and good thermal stability

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The method for synthesizing methanol catalysts introduced in the above-mentioned patent adjusts the catalyst’s performance by adding new additives (Li and surfactant), changing the catalyst preparation process (one-step process to two-step or three-step process) and changing the precursor of Al. structure, surface acidity, and electronic properties to improve the activity, selectivity or lifespan of existing catalysts, but the key to improving the activity and lifespan of methanol synthesis catalysts is to increase the specific surface area of ​​the catalyst and the distribution of the active component copper and the promoter zinc more uniform and stronger synergistic effect, none of the above patents involved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 500mL water in dissolving tank 1, add 105gZn (NO 3 ) 2 ·6H 2 O is dissolved to form solution A, the temperature of solution A is raised to 65°C, and CO with a concentration of 90v% is passed into solution A 2 , the pH value of the slurry was controlled to be 7.5±0.2 when gelling, and the reaction time was 0.5h to generate the slurry I containing sediment. Add 500mL of water into the dissolution tank 2, then add 34 grams of sodium metaaluminate to dissolve, and make solution B, raise the temperature of solution B to 65°C, and inject CO with a concentration of 90v% into solution B 2 , the pH value of the slurry was controlled to be 7.8±0.2 when gelling, and the reaction time was 0.5h to generate the slurry II containing sediment. Into solution A CO 2The molar ratio of the total amount of gas to the zinc salt is 3.5, and CO is passed into solution B 2 The total amount of gas and Al in solution B 2 o 3 The molar ratio was 4.0. The two sediment-containing slurrie...

Embodiment 2

[0031] Add 250mL water in dissolving tank 1, add 87gZn (NO 3 ) 2 ·6H 2 O is dissolved to form solution A, the temperature of solution A is raised to 60°C, and CO with a concentration of 95v% is passed into solution A 2 , the pH value of the slurry was controlled to be 7.8±0.2 when gelling, and the reaction time was 0.5h to generate the slurry I containing sediment. Add 300mL of water into the dissolution tank 2, then add 48 grams of sodium metaaluminate to dissolve, and make solution B, raise the temperature of solution B to 65°C, and inject CO with a concentration of 95v% into solution B 2 , the pH value of the slurry was controlled to be 7.8±0.2 when gelling, and the reaction time was 0.5h to generate the slurry II containing sediment. Into solution A CO 2 The molar ratio of the total amount of gas to the zinc salt is 3.8, and CO is passed into solution B 2 The total amount of gas and Al in solution B 2 o 3 The molar ratio was 4.4. The two sediment-containing slurrie...

Embodiment 3

[0034] Add 400mL water in dissolving tank 1, add 78gZn (NO 3 ) 2 ·6H 2 O is dissolved to form solution A, the temperature of solution A is raised to 65°C, and CO with a concentration of 88v% is passed into solution A 2 , the pH value of the slurry was controlled to be 8.0±0.2 when gelling, and the reaction time was 0.5h to generate the slurry I containing sediment. Add 400mL of water into the dissolution tank 2, then add 44 grams of sodium metaaluminate to dissolve, and make solution B, raise the temperature of solution B to 55°C, and inject CO with a concentration of 90v% into solution B 2 , the pH value of the slurry was controlled to be 7.6±0.2 when gelling, and the reaction time was 0.5h to generate the slurry II containing sediment. Into solution A CO 2 The molar ratio of the total amount of gas to the zinc salt is 2.8, and CO is passed into solution B 2 The total amount of gas and Al in solution B 2 o 3 The molar ratio was 3.5. The two sediment-containing slurrie...

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PUM

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Abstract

The invention discloses a preparation method for a catalyst containing copper and zinc. The method comprises the following steps: respectively preparing a precipitate containing a zinc compound and a precipitate containing an aluminum compound through carbonization; then mixing and aging the two precipitates and adding basic copper carbonate at the same time; and carrying out washing, filtering, drying, baking and pressed forming so as to obtain the catalyst containing copper and zinc. The catalyst prepared by using the method has a high specific area and uniform active particles, improves synergism between the two active components--copper and the cocatalyst zinc, enhances activity and thermal stability of the catalyst containing copper and zinc and prolongs the service life of the catalyst. The catalyst is applicable as a catalyst for synthesis of methanol.

Description

technical field [0001] The invention relates to a preparation method of a copper-zinc catalyst, in particular to a preparation method of a copper-zinc catalyst with high activity and good thermal stability for synthesizing methanol. 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. ...

Claims

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Application Information

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IPC IPC(8): B01J23/80C07C31/04C07C29/154
CPCY02P20/52
Inventor 王海涛徐学军刘东香冯小萍王继锋
Owner CHINA PETROLEUM & CHEM CORP
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