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Method for directly producing 1,2-pentanediol through furfural hydrogenation

A technology of pentanediol and furfural, which is applied in the field of direct production of 1,2-pentanediol by hydrogenation of furfural, can solve the problems of high equipment and operation requirements, expensive preparation cost of noble metal catalysts, high reaction pressure of Cu-based catalysts, etc. Low cost, low catalyst cost, simple and fast energy consumption effect

Active Publication Date: 2019-04-12
JIAXING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of expensive preparation cost of noble metal catalysts, high reaction pressure of Cu-based catalysts, and high requirements for equipment and operation in the existing process of hydrogenation of furfural to directly prepare 1,2-pentanediol. A new method for direct production of 1,2-pentanediol by hydrogenation of furfural

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  • Method for directly producing 1,2-pentanediol through furfural hydrogenation

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Effect test

Embodiment 1

[0031] Embodiment 1: A kind of method of furfural hydrogenation direct production 1,2-pentanediol

[0032] Its production method is: add 11.9g of cobalt chloride hexahydrate and 150mL of water into a 500mL round bottom flask, stir to dissolve and place it in an ice-water bath, and add 6.8g of KBH 4 Dissolve it in 150mL of water and place it in a dropping funnel. Under the protection of a nitrogen atmosphere, slowly add it dropwise to the above round bottom flask, the reaction proceeds rapidly, a large amount of gas is released, and Co-B precipitates are formed. When no gas is generated, filter the solid product, wash the solid product with deionized water and absolute ethanol for 3-5 times, and finally store the sample in absolute ethanol for later use. Put 0.2g of Co-B amorphous alloy catalyst, 0.5g of furfural, and 10.0mL of ethanol into a 50mL stainless steel reactor with polytetrafluoroethylene, and react at a temperature of 140°C and a pressure of 1.5MPa for 12h.

Embodiment 2

[0033] Embodiment two: a kind of method of furfural hydrogenation direct production 1,2-pentanediol

[0034] Its production method is: add 5.95g of cobalt chloride hexahydrate, 5.95g of nickel chloride hexahydrate and 150mL of water into a 500mL round-bottomed flask, stir to dissolve and put it in an ice-water bath, and add 6.75g of KBH 4 Dissolve in 150mL of water and place it in a dropping funnel. Under the protection of a nitrogen atmosphere, slowly add it dropwise to the above round bottom flask. The reaction proceeds rapidly, a large amount of gas is released, and a black precipitate of Co-Ni-B is formed. When no gas is generated, filter the solid product, wash the solid product with deionized water and absolute ethanol for 3-5 times, and finally store the sample in absolute ethanol for later use. Put 0.2g Co-Ni-B amorphous alloy catalyst, 0.5g furfural, and 10.0mL ethanol into a 50mL stainless steel reactor with polytetrafluoroethylene, and react at a temperature of 160°...

Embodiment 3

[0035] Embodiment three: a kind of method of furfural hydrogenation direct production 1,2-pentanediol

[0036]Its production method is as follows: add 11.9g of cobalt chloride hexahydrate and 150mL of water into a 500mL round bottom flask, stir to dissolve and place it in an ice-water bath, and add 4.73g of NaBH 4 and 2.75g NaH 2 PO 2 Dissolve it in 150mL of water and place it in a dropping funnel. Under the protection of nitrogen atmosphere, slowly add it dropwise into the above round bottom flask, the reaction proceeds rapidly, a large amount of gas is released, and a black precipitate of Co-P-B is formed. When no gas is generated, filter the solid product, wash the solid product with deionized water and absolute ethanol for 3-5 times, and finally store the sample in isopropanol for later use. Put 0.2g Co-P-B amorphous alloy catalyst, 0.5g furfural, and 10.0mL isopropanol into a 50mL stainless steel reactor with polytetrafluoroethylene, and react at a temperature of 120°C ...

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Abstract

The invention relates to a method for directly producing 1,2-pentanediol through furfural hydrogenation. The method includes the step of conducting a hydrogenation reaction under certain reaction temperature and hydrogen pressure conditions with the presence of solvents with furfural as the raw material and amorphous alloy as the catalyst to generate 1,2-pentanediol through one step. The method has the advantages of being mild in catalytic reaction condition, low in catalyst preparing cost and simple in after-reaction catalyst separation; the problems are solved that in the existing process ofdirectly preparing 1,2-pentanediol through furfural hydrogenation, the preparing cost of noble metal catalysts is high, the reaction pressure of Cu-series catalysts is high, the requirements for devices and operation are high and existing catalysts are complicated to recover after reaction; the method has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation, and in particular relates to a method for directly producing 1,2-pentanediol by hydrogenation of furfural. Background technique [0002] 1,2-Pentanediol has a very important application in industry. It is an important intermediate for the synthesis of high-efficiency and low-toxicity fungicide propiconazole. It can also be used as a humectant and solubilizer with excellent performance. It is widely used in various In daily care products, it also has a certain antiseptic effect and can be used as an antibacterial agent. At present, the industry mainly produces 1,2-pentanediol based on fossil resources. There are two main methods: one is to use n-valeric acid as a raw material, and obtain 2-bromo-n-valeric acid by brominating n-valeric acid, and then Hydrolysis to obtain 2-hydroxy-n-valeric acid, and finally reduction of 2-hydroxy-n-valeric acid to obtain 1,2-pentanediol; the other is to use...

Claims

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Application Information

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IPC IPC(8): C07C29/141C07C31/20B01J23/75B01J27/185
CPCB01J23/75B01J27/1853C07C29/141C07C31/20
Inventor 夏启能贾红燕王燕刚葛志刚李溪沈张锋
Owner JIAXING UNIV
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