Liquid-phase hydrofining method of 1, 5-pentanediol

A liquid-phase hydrogenation and refining method technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve the problems of high process operation severity, high process operation temperature, and increased equipment investment, etc. Achieve the effect of lowering the hydrogenation reaction temperature, simple design and increase of production capacity, and reduced investment

Pending Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional 1,5-pentanediol preparation process, the process operation temperature is high, the pressure is high, the process operation is harsh, and the equipment requirements are high. The use of hydrogen cycle compressors increases the investment of the device

Method used

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  • Liquid-phase hydrofining method of 1, 5-pentanediol
  • Liquid-phase hydrofining method of 1, 5-pentanediol
  • Liquid-phase hydrofining method of 1, 5-pentanediol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation steps of the modified nickel-based supported catalyst in this example are as follows: first equip γ-Al 2 o 3 The sol was coated on the surface of 80g spherical activated carbon by 7 dipping methods, each dipping time was 10min, the dipping temperature was normal temperature, and the pressure was normal pressure. N 2 Calcined at 400°C for 4 hours in the atmosphere to obtain γ-Al 2 o 3 Membrane-coated activated carbon support, γ-Al 2 o 3 The weight ratio with activated carbon is 4:1;

[0041] Prepare a nickel nitrate aqueous solution with a concentration of 1.1 mol / L and a nitrate solution with a concentration of 0.8 mol / L metallic iron, and then use an equal-volume impregnation method to place 100 g of the above-prepared γ-Al 2 o 3 The membrane-coated activated carbon support was immersed in an aqueous solution of nickel nitrate and a nitrate solution of metal iron, and immersed at 20° C. for 5 hours to obtain a catalyst precursor. The catalyst pr...

Embodiment 2

[0046] The preparation steps of the modified nickel-based supported catalyst in this example are as follows: first equip γ-Al 2 o 3 The sol was coated on the surface of 80g spherical activated carbon by 9 dipping methods, each dipping time was 15min, the dipping temperature was normal temperature, and the pressure was normal pressure. After filtering, it was first dried at 55°C for 5h, and then N 2 Calcined at 450°C for 5 hours in the atmosphere to obtain γ-Al 2 o 3 Membrane-coated activated carbon support, γ-Al 2 o 3 The weight ratio with activated carbon is 5:1;

[0047] Prepare a nickel nitrate aqueous solution with a concentration of 1.2mol / L and a metal copper nitrate solution with a concentration of 0.8mol / L, and then use an equal volume impregnation method to mix 100g of γ-Al 2 o 3 The membrane-coated activated carbon carrier is immersed in a nickel nitrate aqueous solution and a metal copper nitrate solution at a temperature of 40° C. for 2 hours to obtain a cat...

Embodiment 3

[0052] The preparation steps of the modified nickel-based supported catalyst in this example are as follows: first equip γ-Al 2 o 3 The sol was coated on the surface of 80g spherical activated carbon by 10 dipping methods, each dipping time was 20min, the dipping temperature was normal temperature, and the pressure was under normal pressure. in N 2 Calcined at 500°C for 6 hours in the atmosphere to obtain γ-Al 2 o 3 Membrane-coated activated carbon support, γ-Al 2 o 3 The weight ratio with activated carbon is 6:1;

[0053] Prepare a nickel nitrate aqueous solution with a concentration of 1.1 mol / L and a nitrate solution of metal cobalt with a concentration of 0.8 mol / L, and then use an equal volume impregnation method to place 100 g of the above-prepared γ-Al 2 o 3 The membrane-coated activated carbon support was immersed in a nickel nitrate aqueous solution and a metal cobalt nitrate solution at 25° C. for 4 hours to obtain a catalyst precursor. Then the catalyst prec...

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Abstract

The invention provides a liquid phase hydrofining method of 1, 5-pentanediol. According to the method, a two-step process is adopted, firstly, dimethyl glutarate is generated through an esterificationreaction, and secondly, 1, 5-pentanediol is generated through a dimethyl glutarate liquid-phase hydrogenation process by adopting a modified nickel-based supported catalyst. According to the liquid phase hydrofining method, reaction is carried out on a fixed bed hydrogenation device, the adopted catalyst is a modified nickel supported catalyst, hydrogen required by reaction is providedby a liquidcirculating material, no expensive hydrogen circulating compressor is needed to be arranged in the device, a material passing through a reactor is a single liquid phase material, the production costis reduced, and the product quality is improved.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a liquid-phase hydrogenation refining method of 1,5-pentanediol based on a modified nickel-based supported catalyst. Background technique [0002] 1,5-Pentanediol is an important chemical raw material, which is widely used in the production of polyester, polyurethane, plasticizer, fragrance, synthetic lubricating oil, and disperse dye products. Due to the good performance and wide application of products developed with 1,5-pentanediol, countries all over the world are increasing their development efforts, especially as the world pays more and more attention to environmental protection, 1,5-pentanediol is used as Environmental protection products such as polyester hot melt adhesives and polyester adhesives produced from raw materials are more popular among people. At present, the direct hydrogenation method of glutaric acid and the hydrogenation method of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/149C07C69/42C07C67/08B01J23/755B01J35/10
CPCC07C29/149C07C67/08B01J23/755B01J35/1019B01J35/1042C07C69/42C07C31/20
Inventor 常慧秦技强叶军明孙骏方玲陆鑫曹强
Owner CHINA PETROLEUM & CHEM CORP
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