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Preparation method of low-impurity-content copper-based methanol synthesis catalyst

A methanol synthesis and catalyst technology, which is applied in the field of preparation of copper-based methanol synthesis catalyst with low impurity content and high activity, can solve the problems of manufacturer loss, methanol parking, waxing, etc., and achieve the effect of high catalytic activity and thermal stability

Inactive Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of impurity ions has an adverse effect on the performance of the catalyst. For example, the presence of Na+ in the CZA catalyst is likely to cause wax deposition during the use of the catalyst. In severe cases, methanol production is forced to stop, causing manufacturers to suffered heavy losses (Guangdong Chemical Industry, 2005, 11:68,76)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 96.6g Cu(NO 3 ) 2 ?3H 2 O, 148.8g Zn(NO 3 ) 2 ?6H 2 O, 37.5g Al(NO 3 ) 3 ?9H 2 O and 17.2g Zr(NO 3 ) 4 ?5H 2 O is dissolved in water to form a solution with a total salt concentration of 1mol / L, and the mixed nitrate solution and 1mol / L Na 2 CO 3 After the solution was preheated to 60°C, it was added to 60°C water in parallel and kept the pH of the solution at 7~8; then the obtained precipitate was added to the autoclave together with the mother liquor for hydrothermal aging treatment and stirring, and the aging temperature was 70°C, the aging time is 4h, the temperature is lowered to room temperature after aging; the precipitate is washed with 3L of 60°C water for 5 times, and finally filtered, the filter cake is dried at 90°C for 4h, and roasted at 350°C for 1h , and finally, the obtained solid was punched into pieces, crushed into 20-40 meshes, and named CZA1(70).

[0018] The precipitate obtained in the above process was not subjected to hydrother...

Embodiment 2

[0020] Weigh 120.8g Cu(NO 3 ) 2 ?3H 2 O, 133.9g Zn(NO 3 ) 2 ?6H 2 O, 18.8g Al(NO 3 ) 3 ?9H 2 O and 64.1g Mg(NO 3 ) 2 ?6H 2 O is dissolved in water to form a solution with a total salt concentration of 1mol / L, and the mixed nitrate solution and 1mol / L NaHCO 3 After the solution was preheated to 60°C, it was added to 60°C water in parallel and kept the pH of the solution at 7~8; then the obtained precipitate was added to the autoclave together with the mother liquor for hydrothermal aging treatment and stirring, and the aging temperature was 80°C, the aging time is 3h, after aging, the temperature is lowered to room temperature; the precipitate is washed with 3L of 60°C water for 5 times, and finally filtered, the filter cake is dried at 90°C for 4h, and roasted at 350°C for 1h , and finally, the obtained solid was punched into pieces, crushed into 20-40 meshes, and named as CZA2(80).

[0021] The precipitate obtained in the above process was not subjected to hydroth...

Embodiment 3

[0023] Weigh 169.1g Cu(NO 3 ) 2 ?3H 2 O, 59.5g Zn(NO 3 ) 2 ?6H 2 O, 37.5g Al(NO 3 ) 3 ?9H 2 O and 18.3g Ba(NO 3 ) 2 Dissolve in water to form a solution with a total salt concentration of 1mol / L, mix the nitrate solution and 1mol / L K 2 CO 3 After the solution was preheated to 60°C, it was added to 60°C water in parallel and kept the pH of the solution at 7~8; then the obtained precipitate was added to the autoclave together with the mother liquor for hydrothermal aging treatment and stirring, and the aging temperature was 100°C, the aging time is 2h, the temperature is lowered to room temperature after aging; the precipitate is washed with 3L of 60°C water for 5 times in total, and finally filtered, the filter cake is dried at 90°C for 4h, and roasted at 350°C for 1h , and finally, the obtained solid was punched into pieces, crushed into 20-40 meshes, and named as CZA3(100).

[0024] The precipitate obtained in the above process was not subjected to hydrothermal ag...

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Abstract

The invention relates to a preparation method of a low-impurity-content copper-based methanol synthesis catalyst, belonging to the technical field of catalyst preparation. The preparation method comprises the following steps: adding a nitrate solution (containing Cu<2+>, Zn<2+> and Al<3+>) and an alkaline precipitator in water in a parallel flow manner; after a neutralization reaction is finished, performing hydrothermal ageing treatment for 1-4h, washing, filtering, drying, roasting, and finally tabletting and forming to obtain the catalyst. The preparation method has the beneficial effects that by adopting a hydrothermal ageing treatment technology, the crystallization and Cu-Zn isomorphous substitution progress of amorphous precipitate are accelerated, so that impurity ions are easily removed by water washing and the finally obtained catalyst has relatively high methanol synthesis catalytic activity and thermal stability.

Description

technical field [0001] The invention relates to a preparation method of a copper-based methanol synthesis catalyst with low impurity content and high activity, and belongs to the technical field of catalyst preparation. Background technique [0002] Methanol is an important C1 chemical product and a raw material for its downstream products. Today, when energy and the environment are highly concerned, methanol is also considered to be an extremely important energy carrier and a clean vehicle fuel. In industry, CuO-ZnO-Al is commonly used in the production of synthetic gas-based methanol 2 o 3 (CZA) catalyst, the performance of the catalyst is not only related to the composition, but more importantly depends on the preparation method. [0003] Methanol synthesis catalysts are mostly prepared by co-precipitation method, and commonly used precipitants include Na 2 CO 3 , NaHCO 3 、K 2 CO 3 and KHCO 3 Carbonates such as Chinese patents CN1356166A, CN1962063A, CN1660489A a...

Claims

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Application Information

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IPC IPC(8): B01J23/80B01J23/83C07C31/04C07C29/154
CPCY02P20/52
Inventor 于杨陈海波贺健毛春鹏曹建平魏士新殷玉圣
Owner CHINA PETROLEUM & CHEM CORP
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