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Catalyst for preparing 1, 4-butanediol through fixed bed hydrogenation of 1, 4-butynediol as well as preparation method and application of catalyst

A technology of butynediol and catalyst is applied in the field of preparation of Raney nickel catalyst, which can solve the problems of poor wear resistance, easy powder loss, low mechanical strength of Raney nickel catalyst and the like

Inactive Publication Date: 2021-06-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of the present invention is to provide a process for the low mechanical strength, poor wear resistance, easy pulverization and loss of the existing Raney nickel catalyst, which is not suitable for the application of large-tonnage continuous catalytic hydrogenation Granular Raney Nickel Catalyst for BDO Preparation by BYD Hydrogenation with Simple Operation and Good Catalytic Hydrogenation Effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 40kg of nickel ingots and 1kg of niobium ingots and place them in an intermediate frequency induction melting furnace, seal the melting furnace, turn on the current, heat and melt at 1800°C for 60 minutes, pour the refined alloy water into the cast steel graphite plate, and cast the mold; Put the above-mentioned nickel-niobium alloy ingot and 40kg aluminum ingot into the medium-frequency induction melting furnace again, seal the melting furnace, turn on the current, heat-preserve and melt at 1500°C for 30 minutes, pour the refined alloy water into the cast steel graphite plate, and carry out secondary melting. mold. Break the cooled alloy ingot, and sieve the nickel-niobium-aluminum precursor alloy of 3-7 meshes; accurately weigh 30g of metal alloy particles, place them in a reaction tube with an inner diameter of 8mm, and use 6L / The speed of h is introduced from the bottom of the reaction tube, passes through the bed of metal alloy particles and then flows out f...

Embodiment 2

[0021] Weigh 38kg of nickel ingots and 0.5kg of niobium ingots and place them in an intermediate frequency induction melting furnace, seal the melting furnace, turn on the current, heat and melt at 1800°C for 60 minutes, pour the refined alloy water into a cast steel graphite plate, and cast the mold Place the above-mentioned nickel-niobium alloy ingot and 42kg aluminum ingot in the medium-frequency induction melting furnace again, seal the melting furnace, turn on the current, heat-preserve and melt at 1500°C for 30min, pour the refined alloy water into the cast steel graphite tray, and carry out two secondary mold. Break the cooled alloy ingot, and sieve the nickel-niobium-aluminum precursor alloy of 3-7 meshes; accurately weigh 30g of metal alloy particles, place them in a reaction tube with an inner diameter of 8mm, and use 3wt% NaOH alkali solution at 6L / h The speed is passed from the bottom of the reaction tube, passes through the bed of metal alloy particles and then fl...

Embodiment 3

[0024] Weigh 38kg of nickel ingots and 0.5kg of niobium ingots respectively and place them in an intermediate frequency induction melting furnace, seal the melting furnace, turn on the current, heat and melt at 2000°C for 30 minutes, pour the refined alloy water into a cast steel graphite plate, and cast the mold Place the above-mentioned nickel-niobium alloy ingot and 42kg aluminum ingot in the medium-frequency induction melting furnace again, seal the melting furnace, turn on the current, and heat-preserve and melt at 1800°C for 30min, pour the refined alloy water into the cast steel graphite tray, and carry out two secondary mold. Break the cooled alloy ingot, and sieve the nickel-niobium-aluminum precursor alloy of 3-7 meshes; accurately weigh 30g of metal alloy particles, place them in a reaction tube with an inner diameter of 8mm, and use 8L / The speed of h is introduced from the bottom of the reaction tube, passes through the bed of metal alloy particles and then flows ...

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PUM

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Abstract

The invention discloses a catalyst for preparing 1, 4-butanediol through fixed bed hydrogenation of 1, 4-butynediol, and the catalyst is granular Raney nickel doped with niobium element; and the catalyst comprises the following components in percentage by mass: 88-98% of nickel, 0.1-5% of niobium and 5-10% of aluminum. The method comprises the following steps: preparing metal precursor alloy particles; and using alkali liquor for activating the metal alloy particles. The preparation process is simple to operate and good in catalytic hydrogenation effect.

Description

technical field [0001] The invention relates to the field of preparation of Raney nickel catalysts, in particular to a method for preparing Raney nickel catalysts for hydrogenating 1,4-butynediol to prepare 1,4-butanediol. Background technique [0002] 1,4-Butanediol (BDO) is an important basic organic raw material. It has important and extensive uses in the fields of medicine, textiles, and military industry. Its downstream products mainly include tetrahydrofuran, γ-butyrolactone, biodegradable Downstream derivatives such as plastic polybutylene succinate. [0003] The Reppe synthesis method is a widely used method for industrial production of BDO. This method uses acetylene and formaldehyde as raw materials to synthesize 1,4-butynediol (BYD) under the action of a copper catalyst. BYD is then catalytically hydrogenated to produce BDO. [0004] The preparation of BDO by hydrogenation of BYD is a series of reactions. First, BYD is hydrogenated to generate 1,4-butenediol (BED...

Claims

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Application Information

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IPC IPC(8): B01J25/02C07C29/17C07C31/20
CPCB01J25/02C07C29/172
Inventor 荣泽明王凤阳马大庆刘东妮苏东宁秦树春王越
Owner DALIAN UNIV OF TECH
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