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Hydrodechlorination catalyst and preparation method and application thereof

A hydrodechlorination and catalyst technology, which is applied in the chemical industry, can solve the problems of poor long-term stability and easy carbon deposition of the catalyst, and achieve the effects of high bonding strength, suppression of side reactions, and improvement of hydrodechlorination ability

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

[0007] Hydrodechlorination catalysts in the prior art still have problems such as conversion rate and selectivity that need to be further improved, catalysts that are prone to carbon deposition, and poor long-term stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add activated carbon to a hydrofluoric acid solution with a mass concentration of 20%, the mass ratio of activated carbon to hydrofluoric acid solution is 1:2, reflux at 80°C for 10 hours, wash with deionized water, dry, and then add 28% mass concentration of In ammonia water, the mass ratio of activated carbon:ammonia water is 1:2, stirred at room temperature for 5 hours, washed with deionized water, and dried. The pretreated activated carbon carrier was added into a solution containing palladium chloride and copper chloride, soaked for 6 hours, washed and dried. In the solution comprising palladium chloride and copper chloride, the molar concentration of palladium chloride is 1mol / L, and the molar concentration of copper chloride is 1mol / L. The carrier carrying the active component was added to a 10% zinc acetate aqueous solution by mass, immersed at 70°C for 6 hours, then filtered, and vacuum-dried at 80°C for 12 hours. Under nitrogen atmosphere, raise the temperatu...

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Abstract

The invention relates to a hydrodechlorination catalyst and a preparation method and application thereof. The catalyst takes activated carbon as a carrier, active metal components comprise Pd and Cu,auxiliaries comprise Zn, and on the basis of the total weight of the catalyst, the catalyst comprises 0.5-3% by mass of the active metal components, 0.2-2% by mass of the auxiliaries, 800-1500m < 2 > / g of the specific surface area of the catalyst and 0.2-1.5 mmol / g of the total acid content of the catalyst. By modulating the acid property, pore structure and the like of the catalyst, the carbon deposition active center of the catalyst is reduced, the catalyst is not easy to deposit carbon, the side reaction is inhibited, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a hydrodechlorination catalyst and its preparation method and application. Background technique [0002] Chlorotrifluoroethylene is a very important intermediate compound and polymerized monomer in industry, and is widely used in the preparation of various high value-added downstream products, including trifluoroethylene, hexafluorobutadiene, high-performance fluoropolymers, etc. . [0003] The synthesis methods of chlorotrifluoroethylene include zinc powder reductive dechlorination method and hydrodechlorination method. Among them, the hydrodechlorination method has the advantages of continuous production, no zinc chloride residue, and no use of solvents, etc., and has become the main industry. synthetic method. The hydrodechlorination catalyst is the technical core of the hydrodechlorination process. Hydrodechlorination catalysts mainly include heterogeneous cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J35/10B01J37/02B01J37/08C07C17/23C07C21/18
CPCB01J37/0207B01J37/08B01J23/8953C07C17/23B01J35/394B01J35/617B01J35/647C07C21/18
Inventor 刘武灿李小年李玲马超峰石能富
Owner SINOCHEM LANTIAN
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