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Hydrogenation catalyst and preparation method thereof, and application of hydrogenation catalyst in catalyzing tetrahydrofurfuryl alcohol hydrogenation to prepare 1,5-pentanediol

A hydrogenation catalyst and catalyst technology, which are applied in chemical instruments and methods, physical/chemical process catalysts, and preparation of oxygen-containing functional groups reduction, etc., can solve the problems of increasing difficulty in ring opening, low cost, poor stability, etc., and achieve improved stability. With the effect of activity, improving electron transfer performance, and low cost

Active Publication Date: 2020-09-29
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a direct platform molecule, furfural is directly prepared and separated from biomass, and the cost is lower. The direct hydrogenation conversion to 1,5-pentanediol reduces the reaction steps, but requires a catalyst with high hydrogenation activity and ring-opening activity at the same time. , relatively more reaction by-products; furfuryl alcohol is generally obtained by reducing aldehyde groups with furfural, which has the same unsaturated ring as furfural, and has high ring-opening reactivity, but there are also many by-products in the ring-opening process after hydrogenation
Tetrahydrofurfuryl alcohol is a double bond saturated product obtained after furfural hydrogenation. At present, the hydrogenolysis of tetrahydrofurfuryl alcohol to prepare 1,5-pentanediol has a better activity selectivity, but the lower electron density on the ring leads to ring opening. Increased difficulty requires an economical, stable and efficient hydrogenolysis ring-opening catalyst
The active metal of the catalyst gradually changes from Rh to Pt, and then to Cu, and the cost continues to decrease. However, the stability of the active metal copper under high temperature conditions is poor, and it is easy to agglomerate and sinter to cause catalyst deactivation. The current reaction to prepare 1,5-pentanedi Alcohol yield is low

Method used

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  • Hydrogenation catalyst and preparation method thereof, and application of hydrogenation catalyst in catalyzing tetrahydrofurfuryl alcohol hydrogenation to prepare 1,5-pentanediol
  • Hydrogenation catalyst and preparation method thereof, and application of hydrogenation catalyst in catalyzing tetrahydrofurfuryl alcohol hydrogenation to prepare 1,5-pentanediol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Catalyst preparation:

[0037] Add 20g of deionized water to the beaker, weigh 4g of anhydrous copper chloride powder, and ultrasonically shake for 3 hours to dissolve it;

[0038] Prepare 20g of ethylenediamine solution with a concentration of 20wt.%, stir and heat to 40°C, slowly pour in the prepared copper chloride solution, observe the uniform color and stir for 2 hours, pour the copper chloride solution into the hydrothermal kettle, add 12g Citric acid is used as a reducing agent, 2MPa hydrogen pressure reduction at 150°C for 8h to obtain a copper oxide mixture, 1.11g of ferrous chloride is added to the mixture, and 2MPa hydrogen pressure reaction at 150°C for 4h;

[0039] Use 1g of deionized water to ultrasonically disperse 0.4g of titanium trisulfide for 2 hours, add it to the copper oxide mixed solution, then add 12g of molybdenum carbide powder to the above mixed solution, mix it uniformly by ultrasonic and impregnate for 1 hour, filter and dry to obtain a powd...

Embodiment 2

[0043] Catalyst preparation:

[0044] Add 20g of deionized water to the beaker, weigh 0.2g of anhydrous copper sulfate powder, and ultrasonically shake for 3 hours to dissolve it;

[0045] Prepare 20g of EDTA-2Na solution with a concentration of 2wt.%, stir and heat to 40°C, slowly pour into the prepared copper sulfate solution, observe the uniform color and stir for 2h, pour the copper sulfate solution into the hydrothermal kettle, add 2g of citric acid As a reducing agent, 4MPa hydrogen pressure reduction at 120°C for 10h to obtain a copper oxide mixture, add 0.1g cobalt chloride to the mixture, and react with 4MPa hydrogen pressure at 120°C for 8h;

[0046] Ultrasonic disperse 0.013g of titanium trisulfide with 0.1g of deionized water for 2 hours, add it to the copper oxide mixed solution, then add 2g of molybdenum carbide powder to the above mixed solution, mix it uniformly by ultrasonic and impregnate for 1.5 hours, filter and dry to obtain powder, the obtained The powde...

Embodiment 3

[0048] Catalyst preparation:

[0049] Add 20g of deionized water into the beaker, weigh 2.0g of anhydrous copper sulfate powder, and ultrasonically shake for 5 hours to dissolve it;

[0050] Prepare 20g of polyvinylpyrrolidone (K30, M=8000) solution with a concentration of 5wt.%, stir and heat to 40°C, slowly pour into the prepared copper sulfate solution, observe the uniform color and stir for 2h, pour the copper sulfate solution into the hot water In the kettle, add 8.0g oxalic acid as a reducing agent, reduce under 3MPa hydrogen pressure at 140°C for 10h to obtain a copper oxide mixture, add 0.4g potassium dichromate to the mixture, and react under 3MPa hydrogen pressure at 140°C for 20h;

[0051] Use 1g of deionized water to ultrasonically disperse 0.15g of titanium trisulfide for 2 hours, add it to the copper oxide mixed solution, then add 10g of molybdenum carbide powder to the above mixed solution and mix it uniformly for 1.5 hours, then filter and dry to obtain a powde...

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Abstract

The invention discloses application of a molybdenum carbide-dispersed copper oxide-titanium trisulfide catalyst to catalytic hydrogenation of tetrahydrofurfuryl alcohol to prepare 1,5-pentanediol. According to the method, copper oxide is used as an active component, one or more modification metals selected from iron, cobalt, nickel, zinc, chromium and vanadium are used for modifying the active component, titanium trisulfide is used as a cocatalyst, a composite component is loaded on a molybdenum carbide carrier, and the formed catalyst is applied to catalytic conversion of tetrahydrofurfuryl alcohol to prepare 1,5-pentanediol. According to the method, the catalyst is prepared from non-noble metal, so cost is low, and stability is good.

Description

technical field [0001] The present invention relates to a hydrogenation catalyst and its preparation method and application, in particular to the preparation of a molybdenum carbide dispersed modified copper oxide-titanium trisulfide catalyst and its use in catalyzing the hydrogenation of tetrahydrofurfuryl alcohol to produce 1,5- Applications in Pentylene Glycol. [0002] technical background [0003] 1,5-pentanediol is an important chemical intermediate, which is used in the preparation of coatings, spices and polyesters, mainly used in the preparation of polyester polyols, esters used in lubricating oil, polyurethane and other polyesters . [0004] It is an important direction of current research to develop downstream products to replace petrochemical resources with biological platform molecules. 1,5-Pentanediol, as an environmentally friendly chemical raw material that does not pollute the environment, is known as a new cornerstone of organic synthesis because of its un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C31/20C07C29/132
CPCB01J27/24C07C29/132B01J35/394C07C31/20
Inventor 于冠群崔乾袁帅胡江林王鹏余炎冰王加琦黎源
Owner WANHUA CHEM GRP CO LTD
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