Method for preparing copper oxide hydrogenation catalyst loaded on silica gel-mordenite composite carrier

A technology of hydrogenation catalyst and mordenite, which is applied in the field of hydrogenation of copper oxide supported on silica gel-mordenite composite carrier, can solve the problems of high selectivity of 2-methylfuran, incomplete reduction of catalyst, environmental pollution, etc. Achieve uniform particle distribution, small crystal grains, and improve catalytic activity

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 copper oxide hydrogenation catalyst loaded on silica gel-mordenite composite carrier
  • Method for preparing copper oxide hydrogenation catalyst loaded on silica gel-mordenite composite carrier
  • Method for preparing copper oxide hydrogenation catalyst loaded on silica gel-mordenite composite carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method for supporting a copper oxide hydrogenation catalyst on a silica gel-mordenite composite carrier, comprising the steps of:

[0031] 1) Activation of natural mordenite: Roast the natural mordenite raw material at 500°C for 24 hours, and then grind to obtain zeolite powder; according to zeolite powder: 1-2mol / L nitric acid solution=10g: 100mL, select zeolite powder and add 1-2mol / L nitric acid solution, reflux at 80-90°C for 6-8 hours, then filter, wash, dry, and roast at 400°C for 2 hours to obtain the first-time treated zeolite; according to the first-time treated zeolite: 1-2mol / L nitric acid solution=10g: 100mL, select the zeolite for the first treatment and add 1-2mol / L dilute acid solution, reflux at 80-90°C for 6-8 hours, then filter and wash until the pH value is 7-8, Drying and calcining at 550° C. for 2 hours to obtain activated mordenite. The natural mordenite comes from Feilaifeng Nonmetallic Mineral Materials Co., Ltd., Sihui City, Guan...

Embodiment 2

[0035] 1) Activation of natural mordenite: using the step (1) of Example 1 to activate natural mordenite to obtain activated mordenite;

[0036] 2) Take analytically pure Cu(NO 3 ) 2 ·3H 2 O 2.84 g, Ce(NO 3 ) 3 ·6H 2 O 0.5 g, urea 0.50 g dissolved in 5 ml of deionized water, and added to a constant pressure burette for later use. Then take 20 ml industrial alkaline silica sol (density 1.1g / cm 3 , 31 wt SiO 2 %) with 2 mol / L nitric acid solution to adjust the pH to 2, and mechanically stir and mix. Then, the solution in the previously prepared constant pressure burette was dropped into the stirred silica gel solution at a rate of 2 drops / s. Continue stirring for 30 min to form a homogeneous sol. After dripping the mixed solution of copper nitrate and cerium nitrate, continue to stir evenly for 3 h in a water bath at 80°C. When the mixed system is in a semi-gel state, add 3.13 g of activated mordenite, continue stirring until it is completely gelled, and then stop stirr...

Embodiment 3

[0039] A preparation method for supporting a copper oxide hydrogenation catalyst on a silica gel-mordenite composite carrier, comprising the steps of:

[0040] 1) Activation of natural mordenite: using the step (1) of Example 1 to activate natural mordenite to obtain activated mordenite;

[0041] 1) Take analytically pure Cu(NO 3 ) 2 ·3H 2 O 2.84 g, Ce(NO 3 ) 3 ·6H 2 O 0.68 g, 0.59 g of urea was dissolved in 5 ml of deionized water, and added to a constant pressure burette for subsequent use. Then take 20 ml industrial alkaline silica sol (density 1.1g / cm 3 , 30 wt SiO 2 %) with 2 mol / L nitric acid solution to adjust the pH to 2, and mechanically stir and mix. Then, the solution in the previously prepared constant pressure burette was dropped into the stirred silica gel solution at a rate of 2 drops / s. Continue stirring for 30 min to form a homogeneous sol. After dripping the mixed solution of copper nitrate and cerium nitrate, continue to stir evenly for 3 h in a wa...

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PUM

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Abstract

The invention relates to a method for preparing a copper oxide hydrogenation catalyst loaded on a silica gel-mordenite composite carrier. The method is characterized by comprising the following steps of: (1) activating natural mordenite; (2) dropwise adding a silica gel solution for adjusting a pH value to 2-3 into a mixed solution of copper salt, cerium salt and urea, wherein the copper salt, the cerium salt and the silica sol are CuO, CeO2 and SiO2 respectively based on weight, the molar ratio of CuO to SiO2 is 0.1-0.3, the molar ratio of CeO2 to SiO2 is 0.02-0.05, and the mass ratio of the urea to the copper salt is 0.16-0.21; continuously stirring in a water bath of 70-80 DEG C; adding the activated mordenite when a system is in a semi-gel state, wherein the mass ratio of the copper salt to the activated mordenite is 0.7-2; and continuously stirring to complete gelation, stopping stirring, and aging at room temperature to obtain gel; and (3) selecting the gel, washing until the pH value is 6.5-7.5, drying and roasting at the temperature of 450-600 DEG C to obtain the catalyst. The method has the advantages of high specific surface area, uniform distribution of copper oxide grains serving as a catalytic active component, small crystal grains and high activity.

Description

technical field [0001] The invention relates to a preparation method for hydrogenation of copper oxide loaded on a silica gel-mordenite composite 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 to manufacture resin-based synthetic plastics, replacing petrochemical plastics represented by polyethylene and polypropylene, 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 pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/24B01J35/10C07D307/44C07D307/46
Inventor 沈翔王焰新李锐魏小荣胡志海
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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