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Preparation method of Cu/Ce/Co catalyst used for preparing furfuryl alcohol through furfural liquid phase hydrogenation

A technology of catalyst and furfural solution, which is applied in the field of catalyst preparation, can solve the problems of easy deactivation of catalyst, easy growth of copper grains, high reaction temperature, etc., and achieves the effects of excellent activity, low price and simple preparation process

Active Publication Date: 2019-04-12
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of these catalysts is that the reaction temperature is high, and the copper grains are easy to grow, causing catalyst sintering.
[0008] 3) Skeleton nickel-based catalyst: Liu Baijun et al. (Acta Catalytica Sinica, 1997, 18(5): 176-178) found that heteropolyacid Cu 3 / 2 PM 12 o 40 Modified RNi has high activity for hydrogenation of furfural to furfuryl alcohol, but the disadvantage is that the catalyst is easily deactivated
[0009] 4) Skeleton Co-based catalyst: Patent CN1066610 discloses a cobalt-based skeletal catalyst for furfural liquid-phase hydrogenation to produce furfuryl alcohol, but there is Cr in the catalyst, which causes chromium pollution

Method used

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  • Preparation method of Cu/Ce/Co catalyst used for preparing furfuryl alcohol through furfural liquid phase hydrogenation
  • Preparation method of Cu/Ce/Co catalyst used for preparing furfuryl alcohol through furfural liquid phase hydrogenation

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Effect test

Embodiment 1

[0034] Preparation of Cu / Ce / Co catalyst: preparation of Cu(NO 3 ) 2 ·3H 2 O, Ce(NO 3 ) 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O mixed solution, wherein the molar ratio Cu:Ce:Co=0.5:1:4, in addition, prepare mol(NaOH):mol(NaOH 2 CO 3)=2:1 (total concentration is the mixed alkali solution of 3mol / L). Under strong stirring, the above-mentioned salt solution and alkali solution were dropped into a three-necked flask at the same time for co-precipitation, the pH of the precipitation solution was controlled at 9-10, and the precipitation temperature was 50°C. After precipitation, aging for 5 hours, filtering, washing, drying, and roasting at 400°C for 4 hours; then the catalyst precursor was reduced to 300°C at a heating rate of 5°C / min in a hydrogen atmosphere for 4 hours, and the flow rate of hydrogen was 100mL / min. Cool to room temperature to obtain Cu / Ce / Co catalyst.

Embodiment 2

[0036] Preparation of Cu / Ce / Co catalyst: preparation of Cu(NO 3 ) 2 ·3H 2 O, Ce(NO 3 ) 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 A mixed solution of O, wherein the molar ratio Cu:Ce:Co=1:2:5, and a NaOH solution with a concentration of 2.0mol / L was prepared in addition. Under vigorous stirring, the above-mentioned salt solution and alkali solution were simultaneously dropped into a three-necked flask for co-precipitation, and the pH of the obtained precipitation solution was controlled at 9-10, and the precipitation temperature was 60°C. After precipitation, aging for 10 hours, filtering, washing, drying, calcination at 450°C for 5 hours, and then reducing the catalyst precursor to 350°C at a rate of 5°C / min in a hydrogen atmosphere for 5 hours, the flow rate of hydrogen is 120mL / min, Cool to room temperature to obtain Cu / Ce / Co catalyst.

Embodiment 3

[0038] Preparation of Cu / Ce / Co catalyst: prepare CuCl with a total metal ion concentration of 2.5mol / L 2 , Ce(NO 3 ) 3 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 A mixed solution of O, wherein the molar ratio Cu:Ce:Co=1:0.5:5, in addition, the preparation concentration is 2.0mol / L Na 2 CO 3 solution. Under strong stirring, the above-mentioned salt solution and alkali solution were dropped into a three-necked flask at the same time for co-precipitation, and the pH of the obtained precipitation solution was controlled at 8-9, and the precipitation temperature was 70°C. After precipitation, aging for 6 hours, filtering, washing, drying, calcination at 450°C for 3 hours, and then reducing the catalyst precursor to 450°C at a rate of 5°C / min in a hydrogen atmosphere for 2 hours, the flow rate of hydrogen is 110mL / min, Cool to room temperature to obtain Cu / Ce / Co catalyst.

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Abstract

The invention discloses a Cu / Ce / Co catalyst used for preparing furfuryl alcohol through furfural liquid phase hydrogenation. The catalyst is low in Cu loading capacity, high in activity and good in stability. The Cu / Ce / Co catalyst is composed of Cu, CeO2 and Co3O4, wherein the Cu / Ce / Co catalyst comprises, by mass, 5-35% of Cu, 5-35% of CeO2 and 30-70% of Co3O4. The invention also discloses a preparation method of the catalyst and application in preparing the furfuryl alcohol through furfural liquid phase hydrogenation. The Cu / Ce / Co catalyst is composed of only three inorganic substances and isenvironmentally friendly, free of toxins, simple in preparation process, low in price, convenient to use, excellent in activity and selectivity and stability, and the furfural conversion rate and thefurfural selectivity are obviously improved.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, in particular to a catalyst made of Cu and CeO for furfural liquid-phase hydrogenation to prepare furfuryl alcohol. 2 and Co 3 o 4 The preparation method of the catalyst of composition and its use. Background technique [0002] Non-renewable fossil resources such as oil and coal form the cornerstone of today's energy and chemical industries. However, the depletion of fossil resources, environmental pollution and greenhouse gas emissions during use have become bottlenecks restricting the sustainable development of society and economy. The dual pressure of resources and environment has greatly promoted the research on the selective conversion of biomass and its derivatives. The production of furfural is based on renewable agricultural and forestry crops such as dry bagasse rich in pentosan, corncobs, and rice husks, which are inexhaustible and inexhaustible. Among them, the hydrogenation pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C07D307/44
CPCC07D307/44B01J23/002B01J23/83
Inventor 郭星翠徐国强牟新东
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI