Trifluorotrichloroethane hydrodechlorination catalyst and preparation method thereof

A technology of trifluorotrichloroethane and hydrodechlorination, which is applied in the direction of dehalogenation preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. High cost, poor stability and other issues, to achieve the effect of uniform pore size distribution, improved activity and stability, and high stability

Active Publication Date: 2021-03-26
SINOCHEM LANTIAN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The supported noble metal catalysts in the prior art still have problems such as high noble metal loading, high catalyst cost, short life, and poor stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of activated carbon

[0034] The phenolic resin was carbonized under a nitrogen atmosphere at a carbonization temperature of 1000° C. for 4 hours. Configure calcium chloride aqueous solution (0.5wt% CaCl 2), immerse 50g of phenolic resin carbide in 200ml of calcium chloride aqueous solution, stir at room temperature for 2 hours, filter, and dry at 80°C for 12 hours, place the phenolic resin carbide impregnated with calcium chloride in a rotary furnace, and heat it under a nitrogen atmosphere To 1000°C, the heating rate is 20°C / min. After the temperature reaches 1000°C, a mixture of nitrogen and water vapor is introduced to activate water vapor, and the partial pressure of water vapor is controlled to 100KPa, and kept for 5 hours. After the temperature dropped to room temperature, the sample was washed successively with 0.1M hydrochloric acid solution, 0.1M ammonium bicarbonate solution and 60°C warm water to remove impurities such as metal and ash. Aft...

Embodiment 2

[0040] (1) Preparation of activated carbon

[0041] The phenolic resin was carbonized under a nitrogen atmosphere at a carbonization temperature of 900° C. for 6 hours. Configure calcium chloride aqueous solution (1wt% CaCl 2 ), immerse 50g of phenolic resin carbide in 200ml of calcium chloride aqueous solution, stir at room temperature for 6 hours, filter, dry at 80°C for 12 hours, place the phenolic resin carbide impregnated with calcium chloride in a rotary furnace, and heat it under a nitrogen atmosphere To 800°C, the heating rate is 10°C / min. After the temperature reaches 800°C, a mixture of nitrogen and water vapor is introduced to activate water vapor, and the partial pressure of water vapor is controlled to 50KPa, and kept for 8 hours. After the temperature dropped to room temperature, the sample was washed successively with 0.5M hydrochloric acid solution, 0.5M ammonium bicarbonate solution and 50°C warm water to remove impurities such as metals and ash. After filte...

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PUM

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Abstract

The invention relates to a trifluorotrichloroethane hydrodechlorination catalyst and a preparation method thereof. The active component of the catalyst is Pd-Ir-Ni alloy, the carrier is activated carbon, the catalyst comprises the following components in percentage by mass: 0.05 to 2% of Pd, 0.1 to 0.5% of Ir, 0.1 to 5% of Ni and the balance of activated carbon, the average particle size of the catalyst is 5 to 10nm, the average pore size of the catalyst is 0.8 to 2.2 nm, and the BET specific surface area of the catalyst is 800 to 1500m<2>/g. The catalyst is suitable for the hydrodechlorination reaction of trichlorotrifluoroethane, the noble metal content of the catalyst is low, the catalytic activity of the Pd-Ir-Ni solid solution alloy is high, and the catalyst is tightly combined with the carrier, and is high in stability and long in service life.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry, and in particular relates to a trifluorotrichloroethane hydrodechlorination catalyst and a preparation method thereof. Background technique [0002] The hydrodechlorination of trifluorotrichloroethane is the main process for industrially producing chlorotrifluoroethylene, which has the advantages of continuous reaction, high environmental protection, and low production cost. Due to the advantages of high activity and high stability, the supported noble metal catalyst is the main catalyst used in the existing hydrodechlorination process. [0003] CN106140193A discloses that the catalyst precursor for hydrodechlorination of CFC and HCFC includes main active components and auxiliary agents, the main active ingredients are Pd and Cu, and the auxiliary agents are selected from one of transition metals, alkali metals, alkaline earth metals and rare earth metals species, a combination of two o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/89B01J35/00B01J35/02B01J35/10C07C17/23C07C21/18
CPCB01J21/18B01J23/892B01J35/0066B01J35/023B01J35/1057B01J35/1023B01J35/1038C07C17/23C07C21/18
Inventor 刘武灿卢春山李玲马超峰石能富
Owner SINOCHEM LANTIAN
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