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Method for preparing furfuryl alcohol through furfural liquid-phase catalytic hydrogenation

A liquid-phase catalysis and hydrogen production technology, which is applied in chemical instruments and methods, Raney-type catalysts, physical/chemical process catalysts, etc. , the effect of reducing energy consumption and reducing environmental pollution

Active Publication Date: 2014-12-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Copper-based catalysts prepared by precipitation or impregnation methods must be pre-reduced at a temperature higher than 200°C before use, while the reaction temperature of furfural hydrogenation is lower than the reduction temperature of copper catalysts, which will inevitably affect the process equipment. Difficulties in material selection
In addition, copper-chromium-based catalysts commonly used in furfural liquid-phase hydrogenation are difficult to recycle during use, and there are serious environmental pollution problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: sieve 15 grams of 200 mesh copper-aluminum alloy powders, nickel-containing 5.5% (mass %) in the alloy, 25 grams of NaOH is dissolved in 100 milliliters of deionized waters and is made into solution, under stirring state, copper-aluminum alloy powders are slowly Add it into NaOH solution, and then heat up to 70°C for activation for 1 hour. Wash with 500 ml of 60° C. deionized water until the pH is 7, and then replace the deionized water with absolute ethanol. All the above-mentioned activated skeleton copper catalysts and 200 milliliters of furfural were added to the autoclave simultaneously, and then 0.4 grams of NaOH was added. The reaction temperature in the kettle is controlled to be 130-140° C., the hydrogen pressure is 3.0 MPa, the conversion rate of furfural is 99.5%, and the selectivity of furfuryl alcohol is 97.6%.

Embodiment 2

[0015] Embodiment 2: sieve 15 grams of 200 mesh copper-aluminum alloy powders, containing molybdenum 2.0% (mass %) in the alloy, slowly join the copper-aluminum alloy powders in the hydrochloric acid solution of 2.5 mol / liter of 250 milliliters under stirring state, then Raise the temperature to 40°C to activate for 1 hour. Wash with 500 ml of 60° C. deionized water until the pH is 7, and then replace the deionized water with absolute ethanol. All the above-mentioned activated skeleton copper catalysts and 200 milliliters of furfural were added to the autoclave simultaneously, and then 0.4 grams of NaOH was added. The reaction temperature in the kettle is controlled to be 130-140° C., the hydrogen pressure is 3.0 MPa, the conversion rate of furfural is 99.4%, and the selectivity of furfuryl alcohol is 97.3%.

Embodiment 3

[0016] Embodiment 3: sieve 20 grams of 200 order copper-aluminum alloy powders, iron-containing 3.5% (mass %) in the alloy, 30 grams of NaOH is dissolved in 125 milliliters of deionized waters and is made into solution, while stirring, copper-aluminum alloy powders are slowly Add it into NaOH solution, then heat up to 60°C for 1.5 hours activation. Wash with 500 ml of deionized water at 50°C until the pH is 8, and then replace the deionized water with absolute ethanol. All the above-mentioned activated skeleton copper catalysts and 200 milliliters of furfural were added to the autoclave at the same time, and then 0.2 grams of KOH was added. The reaction temperature in the kettle is controlled to be 120-130° C., the hydrogen pressure is 4.0 MPa, the conversion rate of furfural is 99.8%, and the selectivity of furfuryl alcohol is 96.8%.

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Abstract

The invention discloses a method for preparing furfuryl alcohol through furfural liquid-phase catalytic hydrogenation, wherein Cr-free skeletal copper serves as a catalyst; right amount of Cr-free VIB or VIII group transition metal is contained in precursor copper aluminium alloy of the catalyst and used for increasing the activity and the selectivity of the skeletal copper catalyst; and the skeletal copper catalyst can be obtained through extracting and activating the copper aluminium alloy by utilizing an aqueous solution of caustic alkali or inorganic acid. According to the invention, right amount of skeletal copper catalyst and alkaline inorganic matter are added in a furfural liquid-phase hydrogenation system to serve as auxiliaries and the reaction is carried out at lower temperature and hydrogen pressure, therefore, excessive hydrogenation products i.e. 2- methyl furan and tetrahydrofurfuryl alcohol can be avoided from generating and the selectivity of the product furfuryl alcohol is increased. The method disclosed by the invention has the advantages of no chrome in the catalyst, low reaction and light-off temperatures, simpleness in process, high furfuryl alcohol yield and selectivity and capability of continuous indiscriminate application of the catalyst.

Description

Technical field: [0001] The invention relates to a method for preparing furfuryl alcohol through liquid-phase catalytic hydrogenation of furfural, in particular to preparing furfuryl alcohol through liquid-phase catalytic hydrogenation of furfural with a chromium-free framework copper catalyst. Background technique: [0002] Furfuryl alcohol is an important organic chemical raw material, which is used to produce furan-type resins, furfuryl alcohol-urea-formaldehyde resins and phenolic resins with better performance; it can also produce fine chemical products such as medicine, pesticides, coatings, etc.; Good solvent and rocket fuel. In addition, furfuryl alcohol is also widely used in synthetic fiber, rubber and foundry industries. Furfuryl alcohol is generally prepared by catalytic hydrogenation of furfural. [0003] Catalytic hydrogenation of furfural to furfuryl alcohol usually has two methods: gas phase method and liquid phase method. Gas-phase hydrogenation is genera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/44B01J25/00
Inventor 赵会吉刘晨光景美波殷长龙柴永明赵瑞玉张孔远柳云骐
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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