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Hydrogenation catalyst and preparation method, and 1,2-pentanediol preparation method

A hydrogenation catalyst and catalyst technology, applied in the field of hydrogenation, can solve the problem of single derivatives, achieve high conversion rate of furfural, reduce catalyst activity, and prolong service life

Active Publication Date: 2018-06-22
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the prior art, there are few reports and applications of using furfural as a raw material to prepare 1,2-pentanediol. As a bio-based raw material, furfural has a wide range of sources in my country. At present, the main application of furfural is hydrogenation to produce furfuryl alcohol, tetrahydro Furfuryl alcohol and other derivatives are relatively single, so it is of great significance to vigorously develop furfural downstream products and expand its application fields

Method used

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  • Hydrogenation catalyst and preparation method, and 1,2-pentanediol preparation method
  • Hydrogenation catalyst and preparation method, and 1,2-pentanediol preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 198g of 25wt% neutral silica sol was formulated into a 0.2mol / L aqueous silica sol solution, placed in the reaction kettle and heated to 80°C.

[0059] 98.15gCu(NO 3 ) 2 ·3H 2 O, 51.3gCrO 3 , 21.9gCa(NO 3 ) 2 4H 2 O and 9.64g Li 2 CO 3 Dissolved in 1854g of water to prepare an aqueous solution of salt.

[0060] Sodium carbonate is formulated into a 15wt% aqueous solution of the precipitating agent.

[0061] Heat the two solutions to 80°C respectively, then add the two solutions into the reactor in parallel flow, control the temperature in the reactor to 80°C, the precipitation pH to 6.5, and the precipitation time to 2h, then age at 60°C for 3h to obtain a slurry . Then it was washed, filtered, dried at 100°C for 6h, and 65g was taken out and baked at 320°C for 8h. Afterwards, it is pressed into tablets to obtain a 5*5mm cylinder, which is the 1-1# catalyst. Another 65g was compressed into tablets and used as a carrier for later use.

[0062] 7.31g RuCl at ...

Embodiment 2

[0067] 195g of 25wt% neutral silica sol was formulated into a 0.3mol / L aqueous silica sol solution, placed in the reaction kettle and heated to 70°C.

[0068] 117.78gCu(NO 3 ) 2 ·3H 2 O, 42.8g CrO 3 and 32.8gCa(NO 3 ) 2 4H 2 O and 4.82gLi 2 CO 3 Dissolved in 1866g of water to prepare an aqueous solution of salt.

[0069] Sodium carbonate is formulated into a 15wt% aqueous solution of the precipitating agent.

[0070] Heat the two solutions to 70°C respectively, then add the two solutions into the reactor in parallel flow, control the temperature in the reactor to 70°C, the precipitation pH to 7.5, and the precipitation time to 1h, then age at 75°C for 2h to obtain a slurry . Then washed, filtered, dried at 120°C for 4h, and 65g was roasted at 280°C for 6h. Afterwards, tablet molding was performed to obtain a 5*5mm cylinder, and the remaining 65 g of the 2-1# catalyst was obtained for tablet molding as a carrier for later use.

[0071] 7.31g RuCl at room temperature...

Embodiment 3

[0076] 190 g of 25 wt % neutral silica sol was prepared into a 0.4 mol / L aqueous silica sol solution, placed in the reaction kettle, and heated to 60° C.

[0077] 137.41gCu(NO 3 ) 2 ·3H 2 O, 34.2g CrO 3 , 43.8gCa(NO 3 ) 2 4H 2 O and 1.61g Li 2 CO 3 Dissolved in 1887g of water to prepare an aqueous solution of salt.

[0078] Sodium carbonate is formulated into a 15wt% aqueous solution, that is, a precipitating agent aqueous solution.

[0079] Heat the two solutions to 60°C respectively, then add the two solutions into the reactor in parallel flow, control the temperature in the reactor to 60°C, the precipitation pH to 8.5, the precipitation time to 0.5h, and then age at 90°C for 1h to obtain slurry. Then it was washed, filtered, dried at 100°C for 6h, and 65g was taken out and baked at 320°C for 4h. Afterwards, it is pressed into a tablet to obtain a 5*5mm cylinder, which is the 3-1# catalyst. Another 65g was compressed into tablets and used as a carrier for later u...

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Abstract

The present invention relates to a hydrogenation catalyst and a preparation method, and a 1,2-pentanediol preparation method. According to the present invention, two reactors are connected in series,the first reactor uses a Cu-Cr-Si-Ca-Li catalyst to hydrogenate furfural to generate furfuryl alcohol, and the second reactor uses a Ru-Cu-Cr-Si-Ca-Li catalyst to carry out hydrogenolysis on furfurylalcohol to generate 1,2-pentanediol, wherein the material is circulated so as to easily avoid the deposition of the tar generated by the side reaction on the surface of the catalyst; and with the process, the high furfural conversion rate and the high yield of 1,2-pentanediol can be obtained, the side reaction can be effectively inhibited, and the service life of the catalyst is long.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation, and in particular relates to a catalyst for preparing 1,2-pentanediol by hydrogenation of furfural and a method for preparing 1,2-pentanediol. Background technique [0002] 1,2-pentanediol, also known as 1,2-dihydroxypentane, English name 1,2-pentanediol, is a colorless to light yellow pure liquid at normal temperature and pressure, with a flash point of 104°C and a boiling point of 206°C. 0.971, easily soluble in water and organic solvents such as alcohol, ether and ethyl acetate. [0003] 1,2-Pentanediol is an important kind of diol compounds, and it is widely used in pesticides, chemical and daily chemical products. It can synthesize the key intermediate of propiconazole, a systemic triazole fungicide, and is an important raw material for the production of polyester, surfactant and other chemical products. It can improve the water resistance of sunscreen product formulations. It is an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C07C29/132C07C29/17C07C31/125
CPCB01J23/002B01J23/8993B01J2523/00C07C29/132C07D307/44B01J2523/17B01J2523/821B01J2523/67B01J2523/41B01J2523/23B01J2523/11C07C31/125
Inventor 詹吉山崔娇英张礼昌李作金于海波初乃波曹善健尹育黎源
Owner WANHUA CHEM GRP CO LTD
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