Preparation method of copper-based catalyst and application of copper-based catalyst in acetylene hydration reaction

A technology of copper-based catalysts and additives, which is applied in the direction of catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as poor stability and poor acetylene conversion rate, and achieve good stability, low cost, and reduced The effect of reunion

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

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to solve the problem that the catalyst generates acetaldehyde in the hydration reaction of acetylene, the conversion rate of acetylene is not g...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Select columnar activated carbon as the carrier, the particle size is 20 mesh, and the specific surface area is 1000m 2 / g, pore volume 1mL / g. At room temperature, at 5ml / min N 2 Under the atmosphere, perform plasma treatment, current 1A, voltage 10V, after 0.5h treatment, take it out for later use.

[0039] 20.96g copper chloride and 0.21g ZnCl 2 Dissolve in methanol, stir to make it evenly mixed, add the mixed liquid dropwise to 100g plasma-treated activated carbon carrier at 25°C, and treat it under the condition of electrostatic field for 3h, the intensity is 10kv / cm, and then remove it from the electrostatic field Take it out, and then dry it at 70°C for 6 hours to obtain a copper-based catalyst with a copper loading of 10%, ZnCl 2 The loading is 0.1%.

[0040] This catalyst is used in the hydration reaction of acetylene in the reactor. The reaction conditions are: temperature 100°C, pressure 0.01MPa, acetylene volume space velocity 5h -1 Under the conditions,...

Embodiment 2

[0042] Activated carbon fiber is selected as the carrier, its particle size is 100 mesh, and its specific surface area is 800m 2 / g, pore volume 0.25mL / g. At room temperature, at 10ml / min N 2 Under the atmosphere, carry out plasma treatment, current 2A, voltage 15V, take out after treatment for 1h, and then at 30°C, impregnate the activated carbon fiber in ammonium chloride solution with a mass fraction of 10%, after immersion for 5h, take out and dry for later use .

[0043] 90g copper nitrate and 2.25g BiCl 3 Dissolve in deionized water, stir to make it evenly mixed, add the mixed liquid dropwise to 100g plasma-treated activated carbon fiber carrier at 35°C, and treat it under the condition of electrostatic field for 4h, the intensity is 20kv / cm, then from the electrostatic Take it out from the field, and then dry it at 120°C for 10 hours to obtain a copper-based catalyst with a copper loading of 30%, BiCl 3 The loading is 2%.

[0044] This catalyst is used in the hydra...

Embodiment 3

[0046] Activated carbon fiber is selected as the carrier, its particle size is 50 mesh, and its specific surface area is 1600m 2 / g, pore volume 2.5mL / g. At room temperature, at 30ml / min N 2 Under the atmosphere, conduct plasma treatment, current 3A, voltage 20V, take out after treatment for 1.5h, and then at 30°C, soak the activated carbon fibers in a phosphoric acid solution with a mass fraction of 10%, after soaking for 5h, take out, and dry for later use.

[0047] 90g copper nitrate and 2.25g BiCl 3 Dissolve in deionized water, stir to make it evenly mixed, add the mixed solution dropwise to 100g plasma-treated activated carbon fiber carrier at 30°C, and treat it under the condition of electrostatic field for 5h, the intensity is 30kv / cm, and then from the electrostatic Take it out from the field, and then dry it at 110°C for 10h to obtain a copper-based catalyst with a copper loading of 10%, ZnCl 2 The loading is 0.1%.

[0048] This catalyst is used in the acetylene h...

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Abstract

The invention discloses a preparation method of a copper-based catalyst and application of the copper-based catalyst in acetylene hydration reaction. The preparation method of the copper-based catalyst comprises the following steps: dissolving a copper-containing precursor and a base metal additive in a solvent, stirring to uniformly mix, dropwise adding the mixed solution onto a porous solid carrier at 25-35 DEG C, carrying out equivalent-volume impregnation under the action of an electrostatic field for 3-5 hours, and then drying at 35-120 DEG C for 6-10 hours to obtain the copper-based catalyst, and the base metal auxiliary agent is a salt of one or more metals selected from Bi, Ba, Fe, Mn, Zn, K, Ca and Ni. The invention provides the application of the prepared copper-based catalyst in acetylene hydration reaction to generate acetaldehyde, and the copper-based catalyst has the advantages of high conversion rate and good stability.

Description

[0001] (1) Technical field [0002] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of a copper-based catalyst and its application in acetylene hydration reaction. [0003] (2) Background technology [0004] Acetaldehyde is an important organic chemical raw material for the production of acetic acid, acetic anhydride, butyraldehyde, butanol, octanol, pentaerythritol, chloral and other important basic organic synthesis secondary products. The industrial production of acetaldehyde mainly includes four methods: ethylene oxidation, ethanol dehydrogenation, light alkane oxidation and acetylene hydration. Among them, the ethylene oxidation method is the most important method for the production of acetaldehyde to realize industrialization in the 1960s, and it has developed rapidly in recent years. In countries with developed petrochemical industry, the ethylene method has largely replaced the acetylene method. The main reas...

Claims

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Application Information

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IPC IPC(8): B01J27/138B01J27/128B01J27/08B01J29/46B01J37/34C07C45/26C07C47/06
CPCB01J27/138B01J27/128B01J27/08B01J29/46B01J37/342B01J37/347C07C45/26B01J2229/186C07C47/06
Inventor 赵佳庞祥雪朱文锐岳玉学王赛赛陈志王婷冯涛王涛
Owner ZHEJIANG UNIV OF TECH
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