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Cu/SiO2 catalyst and method therefor for synthesizing tetrahydrofuran

A catalyst and hydrogen technology, applied in the direction of organic chemistry, can solve the problems of low dispersion of active components and low hydrogenation activity, and achieve the effects of cheap raw materials, improved activity, and environmental friendliness

Inactive Publication Date: 2015-11-11
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But common Cu / SiO 2 The catalyst also has disadvantages such as low dispersion of active components and low hydrogenation activity.

Method used

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  • Cu/SiO2 catalyst and method therefor for synthesizing tetrahydrofuran
  • Cu/SiO2 catalyst and method therefor for synthesizing tetrahydrofuran

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 2.94gCu(NO 3 ) 2 , dissolved in 40ml of deionized water, stirred at room temperature for 10min, until it was completely dissolved, added 10ml of ammonia water (28wt%) to make cuproammonia solution, stirred for 40min, added 1g of polyethylene glycol, continued to stir for 60min, and controlled the solution temperature is 40°C. Then add 4gSiO 2 , with a specific surface area of ​​150m 2 g -1 , the average pore size is 8nm, and the particle size is 30 mesh. Stirring was continued for 300 min, then the temperature was raised to 90 °C to remove the solvent to obtain a gummy solid. The colloidal solid was calcined at 450°C for 6 hours to obtain 2 The copper oxide precursor on the carrier, its XRD pattern is as follows figure 1 (a) curve; then in a hydrogen atmosphere, at 250 ° C temperature conditions for 12 hours to obtain 25wt% Cu / SiO 2 Catalyst, its XRD pattern is as follows figure 1 The (b) curve, AES figure see figure 2 (a) curve.

[0042] figure 1 It ...

Embodiment 2

[0045] Weigh 2.28gCu(CH 3 COO) 2 , dissolved in 20ml of deionized water, stirred at room temperature for 50min, until it was completely dissolved, added 5ml of ammonia water (25wt%) to make cuproammonia solution, stirred for 60min, added 1g of polyethylene glycol, continued to stir for 80min, and controlled the solution temperature is 30°C. Then add 4gSiO 2 , with a specific surface area of ​​200m 2 g -1 , the average pore size is 6nm, and the particle size is 40 mesh. Stirring was continued for 200 min, then the temperature was raised to 100°C to remove the solvent to obtain a gummy solid. The colloidal solid was calcined at 400°C for 8 hours to obtain 2 The copper oxide precursor on the carrier; then in a hydrogen atmosphere, it was reduced for 6 hours at a temperature of 300°C to obtain 20wt% Cu / SiO 2 catalyst.

Embodiment 3

[0047] Weigh 2.89gCu(HCOO) 2 , dissolved in 15ml of deionized water, stirred at room temperature for 15min, until it was completely dissolved, added 10ml of ammonia water (24wt%) to make cuproammonia solution, stirred for 100min, added 1.5g of polyethylene glycol, continued to stir for 80min, and controlled the solution The temperature is 35°C. Then add 4gSiO 2 , with a specific surface area of ​​300m 2 g -1 , the average pore size is 5nm, and the particle size is 20 mesh. Stirring was continued for 300 min, then the temperature was raised to 95 °C to remove the solvent to obtain a gummy solid. The colloidal solid was calcined at 350°C for 10 hours to obtain 2 The copper oxide precursor on the carrier; then in a hydrogen atmosphere, it was reduced for 4 hours at a temperature of 400°C to obtain 30wt% Cu / SiO 2 catalyst.

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Abstract

The invention discloses a Cu / SiO2 catalyst. A preparation method for the Cu / SiO2 catalyst comprises: by taking SiO2 as a carrier, loading an active component copper, wherein the loading capacity of copper is 10-40wt%; preparing a copper ammine solution through precusor salt of copper and ammonia water; then adding polyethylene glycol; then adding the SiO2 carrier, stirring, drying, roasting and reducing the mixture to prepare the Cu / SiO2 catalyst with high dispersity and high activity; and catalyzing dimethyl maleate for one-step hydrogenation to efficiently synthesizing tetrahydrofuran by using the Cu / SiO2 catalyst. The Cu / SiO2 catalyst disclosed by the invention has the advantages of being high in raw material conversion rate and good in target product selectivity.

Description

technical field [0001] The present invention relates to a kind of by dimethyl maleate in Cu / SiO 2 A method for synthesizing tetrahydrofuran by hydrogenation under the action of a catalyst. Background technique [0002] Tetrahydrofuran has the characteristics of low toxicity and low boiling point. It can dissolve various organic compounds (except polyethylene, polypropylene and fluororesin). It is often used as a solvent for various reactions and resins and rubbers, so it is called "universal solvent". In addition, it is also used as a raw material in the pharmaceutical industry to synthesize progesterone, rifamycin and other drugs. At present, tetrahydrofuran is mainly used for the production of polytetramethylene ether glycol, accounting for about 80% of the total consumption of tetrahydrofuran, while polytetramethylene ether glycol is mainly used for the production of elastic spandex fibers for clothing . [0003] For the production process of tetrahydrofuran, mainly in...

Claims

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Application Information

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IPC IPC(8): B01J23/72C07D307/08
Inventor 张群峰韩雪青马磊卢春山丰枫李小年
Owner ZHEJIANG UNIV OF TECH
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