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Preparation method and application of supported copper-based catalyst

A copper-based catalyst, supported technology, applied in catalyst activation/preparation, hydrogen halide addition preparation, chemical instruments and methods, etc., can solve the problems of low utilization rate of active sites, low catalyst conversion rate, etc. Sintering phenomenon, high stability, high activity effect

Active Publication Date: 2021-09-03
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problems of low conversion rate and low active site utilization rate of existing catalysts for acetylene hydrochlorination, and to provide a supported copper-based catalyst that can increase the utilization rate of metal atoms and improve catalytic activity. Preparation method and its application in acetylene hydrochlorination reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Select columnar activated carbon as the carrier, the particle size is 20 mesh, and the specific surface area is 1200m 2 / g, pore volume 1mL / g.

[0053] Dissolve the mixture of 2.6365g cupric chloride and 0.2478g cupric phosphate and 0.6407g TeB into 50mL deionized water, disperse in ultrasonic wave to mix evenly and fully dissolve, add the mixture dropwise to 50g carrier, and heat at 50°C After medium-volume immersion in a constant temperature box for 90 minutes, microwave radiation treatment was carried out, with a power of 1000 W, microwave radiation for 30 minutes, and then vacuum-dried at 40 ° C for 3 hours, that is, the copper-based catalyst was obtained by low-temperature chemical reduction method; finally, blue light (436nm) was irradiated for 30 minutes, and then the copper-based catalyst was obtained by LEDS Irradiation with blue light is provided to promote the interaction between borides and copper-based precursors. In the catalyst, the copper-based metal lo...

Embodiment 2

[0056] 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.

[0057] The mixture of 10.4740g copper chloride and 9.9100g copper phosphate and 0.9264g HfB 2 Dissolve in 50mL of deionized water, disperse in ultrasonic wave to mix evenly and fully dissolve, add the mixed solution dropwise to 50g carrier, immerse in medium volume in 50℃ incubator for 40min, then carry out microwave radiation treatment, power 1000W, microwave Irradiate for 30 minutes, then dry in vacuum at 40°C for 3 hours, and obtain the copper-based catalyst by low-temperature chemical reduction; finally, irradiate with blue light (450nm) for 30 minutes, and the blue light irradiation is provided by LEDS to promote the interaction between the boride and the copper-based precursor . In the catalyst, the copper-based metal loading (relative to the mass of the carrier) is 20.0%, and the boride loading (relative to the mass of...

Embodiment 3

[0060] Select columnar activated carbon as the carrier, the particle size is 20 mesh, and the specific surface area is 2000m 2 / g, pore volume 1mL / g.

[0061] A mixture of 3.9548g copper chloride and 3.7163g copper phosphate and 4.27778g CaB 2 Dissolve in 50mL of deionized water, disperse in ultrasonic wave to mix evenly and fully dissolve, add the mixed solution dropwise to 50g carrier, immerse in medium volume in 50℃ incubator for 180min, then carry out microwave radiation treatment, power 1500W, microwave Irradiate for 60 minutes, then vacuum dry at 60°C for 8 hours to obtain copper-based catalyst by low-temperature chemical reduction method; finally, blue light (436nm) is irradiated for 20 minutes, and LEDS provides blue light irradiation to promote the interaction between borides and copper-based precursors . In the catalyst, the copper-based metal loading (relative to the mass of the support) is 7.5%, and the loading of the boride (relative to the mass of the support) ...

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Abstract

The invention discloses a preparation method and application of a supported copper-based catalyst. The preparation method of the supported copper-based catalyst comprises the following steps: (1) dissolving a precursor in a solvent to obtain a precursor solution; (2) mixing the precursor solution with a porous solid carrier, carrying out equivalent-volume impregnation in a thermostat at 30-60 DEG C for 10-180 minutes, carrying out microwave radiation for 5-60 minutes at the microwave power of 1000-2000 W, and then carrying out vacuum drying at 40-60 DEG C for 3-8 hours; and finally, irradiating with blue light of 400-480 nm for 10-120 minutes to obtain the supported copper-based catalyst. The porous solid carrier is activated carbon, the precursor is copper salt and a boride auxiliary agent, and in the supported copper-based catalyst, the copper loading capacity is 0.5-30.0 wt%, and the boride loading capacity is 0.1-3.0 wt%; or the porous solid carrier is a porous boride carrier, and the precursor is copper salt. The invention provides the application of the prepared supported copper-based catalyst in acetylene hydrochlorination reaction, and the supported copper-based catalyst has high catalytic activity and high 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 supported copper-based catalyst and its application in acetylene hydrochlorination. [0003] (2) Background technology [0004] Vinyl chloride, generally made from ethylene or acetylene, is an important monomer used in polymer chemical industry. Vinyl chloride is an important monomer for the production of PVC (polyvinyl chloride). PVC material is one of the plastic products with the largest output in the world. It is cheap and can be widely used in various fields such as building materials, fibers, electrical appliances, and daily appliances. [0005] In addition to being used as a monomer for the production of PVC, vinyl chloride (VCM) can also be copolymerized with various compounds such as vinyl acetate, acrylic acid, and vinylidene chloride to produce a variety of widely used synthetic resins. In addition, it can also be used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057B01J23/72B01J37/02B01J37/34B01J37/16C07C17/08C07C21/06
CPCB01J27/0576B01J23/72B01J37/0201B01J37/346B01J37/344B01J37/16C07C17/08C07C21/06
Inventor 李小年赵佳陈怡欣岳玉学
Owner ZHEJIANG UNIV OF TECH
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