A kind of hydrogenation catalyst and preparation method thereof and application in catalyzing tetrahydrofurfuryl alcohol hydrogenation to produce 1,5-pentanediol

A technology of hydrogenation catalysts and modifiers, which is applied in chemical instruments and methods, physical/chemical process catalysts, and preparation of oxygen-containing functional groups. It can solve the problems of increased difficulty in ring opening, low cost, and poor stability, and achieve improved stability. properties and activity, improving electron transfer performance, and improving anti-sintering performance

Active Publication Date: 2022-08-02
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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  • A kind of hydrogenation catalyst and preparation method thereof and application in catalyzing tetrahydrofurfuryl alcohol hydrogenation to produce 1,5-pentanediol
  • A kind of hydrogenation catalyst and preparation method thereof and application in catalyzing tetrahydrofurfuryl alcohol hydrogenation to produce 1,5-pentanediol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of catalyst:

[0036] Add 20g of deionized water to the beaker, weigh 4g of anhydrous copper chloride powder, and ultrasonically shake it for 3h to dissolve it;

[0037] Prepare 20g of ethylenediamine solution with a concentration of 20wt.%, stir and heat to 40 ° C, slowly pour the prepared cupric chloride solution, observe the color uniformity, stir for 2h, pour the cupric chloride solution into the hydrothermal kettle, add 12g Citric acid was used as a reducing agent, and 2MPa hydrogen pressure was reduced at 150 °C for 8 hours to obtain a copper oxide mixed solution. 1.11 g of ferrous chloride was added to the mixed solution, and 2MPa hydrogen pressure was reacted at 150 °C for 4 hours;

[0038] 0.4g of titanium trisulfide was ultrasonically dispersed with 1g of deionized water for 2h, added to the copper oxide mixed solution, and then 12g of molybdenum carbide powder was added to the above-mentioned mixed solution. Ultrasonic mixing was carried out for i...

Embodiment 2

[0042] Preparation of catalyst:

[0043] Add 20g of deionized water to the beaker, weigh 0.2g of anhydrous copper sulfate powder, and ultrasonically shake it for 3h to dissolve it;

[0044] Prepare 20g EDTA-2Na solution with a concentration of 2wt.%, stir and heat to 40°C, slowly pour the prepared copper sulfate solution, observe the color uniformity, stir for 2h, pour the copper sulfate solution into the hydrothermal kettle, add 2g citric acid As a reducing agent, 4MPa hydrogen pressure was reduced at 120°C for 10h to obtain a copper oxide mixed solution, 0.1g of cobalt chloride was added to the mixed solution, and the reaction was performed at 4MPa hydrogen pressure at 120°C for 8h;

[0045] 0.013g of titanium trisulfide was ultrasonically dispersed with 0.1g of deionized water for 2h, added to the copper oxide mixed solution, and then 2g of molybdenum carbide powder was added to the above-mentioned mixed solution. Ultrasonic mixing was carried out for immersion for 1.5h, an...

Embodiment 3

[0047] Preparation of catalyst:

[0048] Add 20g of deionized water to the beaker, weigh 2.0g of anhydrous copper sulfate powder, and ultrasonically shake it for 5h to dissolve it;

[0049] Prepare 20g of polyvinylpyrrolidone (K30, M=8000) solution with a concentration of 5wt.%, stir and heat to 40°C, slowly pour the prepared copper sulfate solution, observe the color uniformity and stir for 2h, pour the copper sulfate solution into the hydrothermal In the kettle, 8.0g of oxalic acid was added as a reducing agent, and the mixture was reduced with 3MPa hydrogen pressure at 140°C for 10h to obtain a copper oxide mixed solution, and 0.4g of potassium dichromate was added to the mixture, and the reaction was carried out under 3MPa hydrogen pressure at 140°C for 20h;

[0050] 0.15g of titanium trisulfide was ultrasonically dispersed with 1g of deionized water for 2h, added to the copper oxide mixed solution, and then 10g of molybdenum carbide powder was added to the above-mentioned...

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Abstract

The invention discloses a method for applying a molybdenum carbide-dispersed copper oxide-titanium trisulfide catalyst to tetrahydrofurfuryl alcohol for catalytic hydrogenation to produce 1,5-pentanediol. Copper oxide is used as an active component, and iron, cobalt and nickel are used , one or several modified metals in zinc, chromium and vanadium are modified, titanium trisulfide is used as a co-catalyst, the composite component is supported on a molybdenum carbide carrier, and it is applied to the catalytic conversion of tetrahydrofurfuryl alcohol to prepare 1,5-pentanediol. The method adopts non-precious metal to prepare the catalyst, and has low cost and good stability.

Description

technical field [0001] The invention relates to a hydrogenation catalyst and a preparation method and application thereof, 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- Application of Pentylene Glycol. technical background [0002] 1,5-Pentanediol is an important chemical intermediate. It is used in the preparation of coatings, fragrances and polyesters. It is mainly used in the preparation of polyester polyols, esters used in lubricating oils, and polyurethanes. . [0003] Replacing petrochemical resources with biological platform molecules to develop downstream products is an important direction of current research. 1,5-Pentanediol, as an environmentally friendly chemical raw material that does not pollute the environment, is known as the new cornerstone of organic synthesis because of its unique properties and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C07C31/20C07C29/132
CPCB01J27/24B01J35/0066C07C29/132C07C31/20
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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