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Method for preparing hydrogenation catalyst by loading copper oxide on silica gel carrier

A hydrogenation catalyst, copper oxide technology, applied in physical/chemical process catalysts, chemical instruments and methods, organic chemistry and other directions, can solve the problems of high 2-methylfuran selectivity, incomplete catalyst reduction, environmental pollution and the like, Achieve high catalytic reduction activity, promote environmental protection, and overcome the effects of low loading

Inactive Publication Date: 2011-11-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by ordinary impregnation method and co-precipitation method is incompletely reduced, part of copper exists in monovalent form, the activity is low, the deep hydrogenation of furfural is less, and the selectivity of 2-methylfuran is higher
However, this type of catalyst contains extremely toxic substance Cr, which is easy to cause serious environmental pollution.

Method used

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  • Method for preparing hydrogenation catalyst by loading copper oxide on silica gel carrier
  • Method for preparing hydrogenation catalyst by loading copper oxide on silica gel carrier
  • Method for preparing hydrogenation catalyst by loading copper oxide on silica gel carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Copper Oxide Hydrogenation Catalyst Cu Supported on Silica Carrier 15 Ce 2 / SiO 2 The preparation method, it comprises the steps:

[0033] 1) Take analytically pure Cu(NO 3 ) 2 ·3H 2 O 2.84g, Ce(NO 3 ) 3 ·6H 2 O 0.30g was dissolved in 5ml deionized water, and added to a constant pressure burette for later use. Then take 20ml industrial alkaline silica sol (density 1.1g / cm 3 , 30wt SiO 2 %) with 2mol / L nitric acid solution to adjust pH=2, and mechanically stir and mix. Then, drop the mixed solution of copper nitrate and cerium nitrate in the constant pressure buret into the above-mentioned silica sol solution at a rate of 2 drops / s, and stir while adding. After the mixed solution of copper nitrate and cerium nitrate is dripped, continue to stir for 30 minutes to form a uniform sol;

[0034] 2) Take 2mL of 4.5mol / L anhydrous sodium carbonate solution, add another constant pressure burette, and add it to the above sol at a rate of 2 drops / s, stir while adding, ...

Embodiment 2

[0038] Copper Oxide Hydrogenation Catalyst Cu Supported on Silica Carrier 15 Ce 3 / SiO 2 The preparation method, it comprises the steps:

[0039] 1) Take analytically pure Cu(NO 3 ) 2 ·3H 2 O 2.84g, Ce(NO 3 ) 3 ·6H 2 O 0.45g was dissolved in 5ml of deionized water, and added to a constant pressure burette for later use. Then take 20ml of industrial silica sol and adjust the pH to 2 with 2mol / L nitric acid solution, and mechanically stir and mix. Then, the mixed solution of copper nitrate and cerium nitrate in the constant pressure burette was dropped into the stirred silica gel solution at a rate of 2 drops / s. After the mixed solution of copper nitrate and cerium nitrate is dripped, continue to stir for 30 minutes to form a uniform sol;

[0040] 2) Take 3.5mL 4.5mol / L anhydrous sodium carbonate solution, add another constant pressure burette, and add it to the above sol at a rate of 2 drops / s, stir while adding, stop dropping after it is completely gelled and stirri...

Embodiment 3

[0044] Copper Oxide Hydrogenation Catalyst Cu Supported on Silica Carrier 15 Ce 4 / SiO 2 The preparation method, it comprises the steps:

[0045] 1) Take analytically pure Cu(NO 3 ) 2 ·3H 2 O 2.84g, Ce(NO 3 ) 3 ·6H 2 O 0.60g was dissolved in 5ml of deionized water, and added to a constant pressure burette for later use. Then take 20ml of industrial silica sol and adjust the pH to 2 with 2mol / L nitric acid solution, and mechanically stir and mix. Then, the mixed solution of copper nitrate and cerium nitrate in the constant pressure burette was dropped into the stirred silica gel solution at a speed of 2 s / drop. After the mixed solution of copper nitrate and cerium nitrate is dripped, continue to stir for 30 minutes to form a uniform sol;

[0046] 2) Take 3.5mL 4.5mol / L anhydrous sodium carbonate solution, add another constant pressure burette, and add it into the above sol at a rate of 2 drops / s, stir while adding, stop stirring after it is completely gelled, Aged at...

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Abstract

The invention relates to a method for preparing a hydrogenation catalyst by loading copper oxide on a silica gel carrier. The method is characterized by comprising the following steps of: (1) dropping silica sol with a pH value regulated to 2-3 into a mixed solution of copper salt and cerium salt, and stirring at room temperature to form uniform sol, wherein by counting the copper salt in terms of CuO, the cerium salt in terms of CeO2 and the silica sol in terms of SiO2, CuO / SiO2 is 0.1-0.3 by weight, and CeO2 / SiO2 is 0.018-0.05 by weight; (2) dropping a precipitant solution into the sol, stirring at the same time, stopping stirring after the sol is completely gelatinized, and ageing at room temperature to obtain gel, wherein the mass ratio of precipitants to the copper salt is 0.2-0.72; (3) washing the gel with water till the pH value of washing liquor is 6.5-7.5, drying, and roasting at 450-600 DEG C to obtain the hydrogenation catalyst in which the copper oxide is loaded on the silica gel carrier. The hydrogenation catalyst has the advantages of large loading capacity, good dispersity of active component copper oxide, small crystalline grain and high catalytic reduction activity.

Description

technical field [0001] The invention relates to a preparation method of a copper oxide hydrogenation catalyst supported on a silica gel carrier. Background technique [0002] So far, resin-based synthetic plastics are all based on light oils such as gasoline formed by petroleum cracking. The reduction of non-renewable petroleum resources and the soaring price have brought a heavy burden to the chemical industry. The use of biological raw materials instead of petrochemical plastics represented by polyethylene and polypropylene to manufacture resin-based synthetic plastics will greatly reduce the dependence of the synthetic chemical industry on petroleum and greenhouse gas emissions. [0003] 5-Hydroxymethylfurfural is an important product of the furan industry. It is derived from fructose-derived biomass. It is aromatic alcohol and aromatic aldehyde in structure and has a furan ring (two double bonds) system. It has pharmaceutical activity, high reactivity and polymerization...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J35/10C07D307/42C07D307/46
Inventor 沈翔李锐王焰新杨祥魏小荣胡志海
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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