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Copper-zinc zirconium oxide metal catalyst and method for catalytic continuous synthesis of gamma-valerolactone by catalyst

A technology of metal catalyst and zinc zirconia, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of harsh reaction conditions, affecting production reaction running time, etc., and achieves simple and good preparation Application prospects, the effect of low production cost

Inactive Publication Date: 2018-02-16
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, there are a lot of research reports on the synthesis of γ-valerolactone using cheap metal catalysts, but most of the catalysts require harsh reaction conditions, which affect their output and reaction time.

Method used

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  • Copper-zinc zirconium oxide metal catalyst and method for catalytic continuous synthesis of gamma-valerolactone by catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a copper-zinc-zirconia metal catalyst, the steps are as follows:

[0025] (1) Accurately weigh copper nitrate and zinc nitrate according to the stoichiometric ratio of molar ratio (2-6): 1, dissolve in distilled water, add excess sodium carbonate solution for co-precipitation, wash with water until neutral, and filter under reduced pressure. Copper-zinc carbonate precipitation is obtained after drying;

[0026] (2) Mix the copper-zinc carbonate precipitate obtained in step (1) with zirconia and alumina, stir evenly, and shape it with an extruder; the diameter of the strip-shaped catalyst is 2-3mm;

[0027] (3) Put the obtained strip-shaped catalyst into an electric heating constant temperature blast drying oven, and dry it at 100-120°C;

[0028] (4) Put the dried catalyst into a muffle furnace, heat up to 400-600°C and roast for 4-5 hours to obtain a copper-zinc oxide metal catalyst; copper oxide and zinc oxide in the catalyst account for 20-40...

Embodiment 2

[0033] A preparation method of a copper-zinc-zirconia metal catalyst, the steps are as follows:

[0034] (1) Accurately weigh copper nitrate and zinc nitrate according to the stoichiometric ratio of 2:1, dissolve them in distilled water, add excess sodium carbonate solution for co-precipitation, wash with water until neutral, filter under reduced pressure, and dry to obtain copper zinc carbonate precipitation;

[0035] (2) Mix the copper-zinc carbonate precipitate obtained in step (1) with zirconia and alumina, stir evenly, and shape it with an extruder; the diameter of the strip-shaped catalyst is 2-3mm;

[0036] (3) Put the obtained strip-shaped catalyst into an electric heating constant temperature blast drying oven, and dry it at 100°C;

[0037] (4) Put the dried catalyst into a muffle furnace, heat up to 400°C and roast for 4 hours to obtain a copper-zinc oxide metal catalyst; copper oxide and zinc oxide in the catalyst account for 20% of the total mass of the catalyst. ...

Embodiment 3

[0040] A preparation method of a copper-zinc-zirconia metal catalyst, the steps are as follows:

[0041] (1) Accurately weigh copper nitrate and zinc nitrate according to the stoichiometric ratio of 2:1, dissolve them in distilled water, add excess sodium carbonate solution for co-precipitation, wash with water until neutral, filter under reduced pressure, and dry to obtain copper zinc carbonate precipitation;

[0042] (2) Mix the copper-zinc carbonate precipitate obtained in step (1) with zirconia and alumina, stir evenly, and shape it with an extruder; the diameter of the strip-shaped catalyst is 2-3mm;

[0043] (3) Put the obtained strip-shaped catalyst into an electric heating constant temperature blast drying oven, and dry it at 100°C;

[0044] (4) Put the dried catalyst into a muffle furnace, heat up to 400°C and roast for 4 hours to obtain a copper-zinc oxide metal catalyst; copper oxide and zinc oxide in the catalyst account for 20% of the total mass of the catalyst. ...

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Abstract

The invention discloses a copper-zinc zirconium oxide metal catalyst and a method for catalytic continuous synthesis of gamma-valerolactone by the copper-zinc zirconium oxide metal catalyst. The method includes the steps: preparing copper-zinc carbonate precipitate according to a co-precipitation method, adding zirconium oxide and aluminum oxide, performing mixed extrusion, drying and calcinationto obtain the copper-zinc zirconium oxide metal catalyst, and catalyzing ethyl levulinate for gamma-valerolactone synthesis by the prepared catalyst subjected to hydrogen reduction. The copper-zinc zirconium oxide metal catalyst taking aluminum oxide as an adhesive is efficient in hydrogenation catalysis of the ethyl levulinate for gamma-valerolactone synthesis and is simple in preparation, low incost, good in catalysis effect and long in service life. Compared with an existing catalyst, the copper-zinc zirconium oxide metal catalyst has the advantages of high selectivity in catalysis of theethyl levulinate for gamma-valerolactone synthesis and fewer side products. In addition, a reaction system is simple, environmentally friendly, low in production cost and capable of continuously synthesizing gamma-valerolactone, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of synthesis of gamma-valerolactone, in particular to a copper-zinc-zirconia metal catalyst and a method for continuously synthesizing gamma-valerolactone using the catalyst. Background technique [0002] Over the past two decades, the catalytic conversion of renewable feedstocks into biomass-based platform chemicals has attracted considerable attention due to the increasing depletion of fossil resources. Among them, γ-valerolactone is a non-toxic, biodegradable, stable and easy-to-storage compound, and because of its great potential in biofuel production, synthesis of fine chemical intermediates, etc., it has become a research hotspot. [0003] The synthesis of γ-valerolactone is based on the hydrodehydration of levulinic acid and its esters with metal catalysts in a hydrogen atmosphere. In the past, this catalytic conversion used noble metal catalysts, such as the use of supported platinum catalysts in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J37/08B01J37/18C07D307/33
Inventor 孔祥晋吴树翔刘军海
Owner LIAOCHENG UNIV
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