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Method for preparing copper-zinc-zirconium composite oxide catalyst

A composite oxide and catalyst technology, applied in the preparation of organic compounds, catalyst activation/preparation, preparation of hydroxyl compounds, etc., can solve the problems of difficult industrial production, low catalyst activity, cumbersome preparation process, etc. Good activity and stability, rich source effect

Inactive Publication Date: 2012-11-21
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art that the preparation process is cumbersome, takes a long time, is not easy to realize industrial production, and the prepared catalyst has a low BET specific surface and Cu surface area, and the catalyst activity is not high, and provides a process Simple and easy to realize the preparation method of copper-zinc-zirconium composite oxide for industrial production, and the catalyst prepared by this method has high BET specific surface and Cu surface area, high catalytic activity and excellent performance

Method used

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  • Method for preparing copper-zinc-zirconium composite oxide catalyst
  • Method for preparing copper-zinc-zirconium composite oxide catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Weigh 0.1 g of konjac glucomannan and add it to 100 ml of deionized water, and stir to form an aqueous solution of konjac glucomannan with a mass concentration of 0.1%; weigh 2.718 g of Cu(NO 3 ) 2 ·3H 2 O, 3.346g of Zn(NO 3 ) 2 ·6H 2 O and 1.073g of Zr(NO 3 ) 4 ·5H 2 O is dissolved in 100 ml of deionized water to form a mixed solution with a molar percentage of copper of 45%, a molar percentage of zinc of 45%, and a molar percentage of zirconium of 10%; a sodium carbonate aqueous solution with a concentration of 0.2mol / L is prepared.

[0037] (2) Pour the mixed solution of copper, zinc and zirconium and the aqueous solution of sodium carbonate into two separatory funnels, and add them dropwise to the aqueous solution of konjac glucomannan at the same time, and adjust the dropping speed of the mixed aqueous solution of copper, zinc and zirconium to 0.8ml / min, the dropping speed of the sodium carbonate aqueous solution is 0.5ml / min, and the pH value is controlled to be a...

Embodiment 2

[0040] Same as Example 1, except that the mass concentration of the aqueous konjac glucomannan solution is 0.3%. Prepared CuO-ZnO-ZrO 2 Catalyst B. The particle size is uniform, and the scale is between 10-25nm. BET specific surface area is 80~90m 2 And Cu surface area 12~14m 2 .

Embodiment 3

[0042] Same as Example 1, except that the mass concentration of the aqueous konjac glucomannan solution is 0.5%. Prepared CuO-ZnO-ZrO 2 Catalyst C. The particle size is uniform, and the scale is between 5-20nm. BET specific surface is 90~100m 2 And Cu surface area 14~15m 2 .

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Abstract

The invention discloses a method for preparing copper-zinc-zirconium composite oxide catalyst. The method comprises the steps of: respectively pouring a mixed aqueous solution of copper salt, zinc salt and zirconium salt as well as an aqueous alkaline solution into two separating funnels; simultaneously dripping into a konjac glucomannan aqueous solution with mass percentage concentration of 0.1%-1%; regulating titrating speed; controlling pH value in a range of 5-10 to obtain a precipitate mixed solution; centrifuging the obtained precipitate mixed solution by utilizing a supercentrifuge; washing and drying for 1-10 hours at a temperature of 80-150 DEG C; and roasting for 2-8 hours at a temperature of 350-700 DEG C. The catalyst prepared by utilizing the method has uniform granular size controlled to be 5-50nm, higher BET (Brunauer-Emmertt-Teller) specific surface area and superficial area of Cu, and good catalytic activity and stability. The preparation method provided the inventionhas the advantages of simple used apparatuses, wide technological tolerance, and abundant sources of the used konjac glucomannan, and is beneficial to the realization of large scale production.

Description

technical field [0001] The invention relates to a preparation method of a copper-zinc-zirconium composite oxide catalyst. More specifically, it relates to a method for assisting the preparation of a copper-zinc-zirconium composite oxide catalyst by using natural macromolecule konjac glucomannan. Background technique [0002] With the intensification of human activities, CO 2 Emissions are increasing year by year, leading to an increasingly significant greenhouse effect. Especially since the beginning of the 21st century, a series of adverse consequences such as global warming caused by the greenhouse effect and the melting of Antarctic glaciers and frequent occurrence of disastrous climates have seriously threatened the living environment of human beings. CO 2 Hydrogenation of methanol to CO 2 One of the ways to use it effectively. The reaction is mainly carried out on copper-based catalysts, among which the catalytic performance of copper-zinc-zirconium composite oxide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01J37/03C07C31/04C07C29/154
CPCY02P20/52
Inventor 郭晓明毛东森卢冠忠王嵩
Owner SHANGHAI INST OF TECH
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