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Liquid-phase hydrogenation synthesis method of 1, 5-pentanediol based on modified palladium family supported catalyst

A technology of supported catalyst and pentanediol solution, which is applied in the fields of chemical instruments and methods, preparation of hydroxyl compounds, physical/chemical process catalysts, etc., and can solve the problems of severe process operation, high process operation temperature, and increased equipment investment, etc. , to achieve the effects of simple production capacity, lower hydrogenation reaction temperature, 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 hydrogenation synthesis method of 1, 5-pentanediol based on modified palladium family supported catalyst
  • Liquid-phase hydrogenation synthesis method of 1, 5-pentanediol based on modified palladium family supported catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The preparation steps of the modified palladium-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;

[0036] Prepare a palladium nitrate aqueous solution with a concentration of 0.7mol / L and an ammonium metatungstate solution with a concentration of 0.8mol / L, and then use an equal volume impregnation method to place 100g of the above-prepared γ-Al 2 o 3 The membrane-coated activated carbon carrier is immersed in an aqueous palladium nitrate solution and an ammonium metatungstate solution for 5 hours at room temperature to obtain a catalyst precursor. The catalyst ...

Embodiment 2

[0039] The preparation steps of the modified palladium-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;

[0040] Prepare a palladium nitrate aqueous solution with a concentration of 0.6mol / L and an ammonium metatungstate solution with a concentration of 0.5mol / L, and then use an equal volume impregnation method to place 100g of the above-prepared γ-Al 2 o 3 The membrane-coated activated carbon support was immersed in an aqueous solution of palladium nitrate and ammonium metatungstate, and immersed for 4 hours...

Embodiment 3

[0044] The preparation steps of the modified palladium-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.

[0045] Prepare a palladium nitrate aqueous solution with a concentration of 0.8mol / L and an ammonium metatungstate solution with a concentration of 0.9mol / L, and then use an equal volume impregnation method to place 100g of the above-prepared γ-Al 2 o 3 The membrane-coated activated carbon support was immersed in an aqueous palladium nitrate solution and an ammonium metatungstate solution for 6 hours at room temperature to obtain a catalyst precursor. Th...

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Abstract

The invention provides a liquid-phase hydrogenation synthesis method of 1, 5-pentanediol based on a modified palladium family supported catalyst. According to the invention, glutaric acid is adopted as a hydrogenation raw material, and a liquid phase hydrogenation technology is adopted to prepare 1, 5-pentanediol. The hydrogenation process is carried out on a fixed bed reactor. The prepared catalyst is a modified palladium family supported catalyst. The method is particularly suitable for 1, 5-pentanediol synthesis refining processes; in the hydrogenation technology, product liquid is recycledso that the amount of hydrogen dissolved in a mixed feedstock is much higher than the amount of hydrogen required for the reaction. No expensive hydrogen circulating compressor is needed in synthesisequipment, and a material passing through the reactor is a single liquid-phase material.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a liquid-phase hydrogenation synthesis method of 1,5-pentanediol based on a modified palladium-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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652C07C29/149C07C31/20
CPCB01J23/6527B01J23/002C07C29/149B01J2523/00B01J2523/31B01J2523/69B01J2523/824C07C31/20
Inventor 常慧黄勇叶军明方玲孙骏陆鑫夏蓉晖
Owner CHINA PETROLEUM & CHEM CORP
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