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Catalyst for synthesizing trifluoroethylene and preparation method thereof

A technology of trifluoroethylene and catalyst, which is applied in the field of catalyst preparation, can solve the problems of easy coking deactivation and short catalyst life, and achieve the effects of strong anti-coking ability, improved activity and high activity

Active Publication Date: 2017-10-13
SHANGHAI 3F NEW MATERIAL TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object to be realized by the present invention is to overcome the shortcomings of existing catalysts such as short service life and easy coking and deactivation, and to provide a catalyst for the synthesis of trifluoroethylene by dehydrofluorination of 1,1,1,2-tetrafluoroethane Catalyst preparation method

Method used

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  • Catalyst for synthesizing trifluoroethylene and preparation method thereof
  • Catalyst for synthesizing trifluoroethylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] According to Al, Ni and Ce molar ratio 1:0.05:0.002, weigh AlCl 3 、NiCl 2 ·6H 2 O and Ce(NO 3 ) 4 ·6H 2 O. AlCl 3 、NiCl 2 ·6H 2 O and Ce(NO 3 )·6H 2 After O is mixed, it is dissolved in water, and the KOH alkali solution is added dropwise under stirring conditions until the precipitation is complete, and then filtered to obtain Al(OH) 3 , Ni(OH) 2 and Ce(OH) 4 mixture. Add ethylene glycol to the mixed precipitate, mix well, and dry it under N 2 Calcined at 450°C for 4h under atmosphere to obtain carbon-containing oxides. Pass carbon oxides through N 2 -H 2 (10%) reduction for 1 h, the reduction temperature is 500°C. Then use HF-N 2 The mixed gas (molar ratio 1:4) was treated at 400° C. for 4 hours to obtain the catalyst of the present invention.

[0029] The catalyst prepared in this example was applied to the gas-phase fluorination of 1,1,1,2-tetrafluoroethane for dehydrofluorination to synthesize trifluoroethylene. Table 1 shows the reactivity of th...

Embodiment 2

[0032] According to Al, Ni and Ce molar ratio 1:0.5:0.002, weigh Al(NO 3 ) 3 9H 2 O, NiCl 2 ·6H 2 O and Ce(NO 3 ) 4 ·6H 2 O. Al(NO 3 ) 3 9H 2 O, NiCl 2 ·6H 2 O and Ce(NO 3 ) 4 ·6H 2 After O is mixed, it is dissolved in water, and the KOH alkali solution is added dropwise under stirring conditions until the precipitation is complete, and then filtered to obtain Al(OH) 3 , Ni(OH) 2 and Ce(OH) 4 mixture. Add ethylene glycol to the mixed precipitate, mix well, and dry it under N 2 Calcined at 450°C for 4h under atmosphere to obtain carbon-containing oxides. Pass carbon oxides through N 2 -H 2 (10%) reduction for 1 h, the reduction temperature is 500°C. Then use HF-N 2 The mixed gas (molar ratio 1:4) was treated at 400° C. for 4 hours to obtain the catalyst of the present invention.

[0033]The catalyst prepared in this example was applied to the gas-phase fluorination of 1,1,1,2-tetrafluoroethane for dehydrofluorination to synthesize trifluoroethylene. Tabl...

Embodiment 3

[0035] According to Al, Ni and Ce molar ratio 1:0.1:0.008, weigh AlCl 3 , Ni(NO 3 ) 2 ·6H 2 O and Ce(NO 3 ) 4 ·6H 2 O. AlCl 3 , Ni(NO 3 ) 2 ·6H 2 O and Ce(NO 3 ) 4 ·6H 2 After O is mixed, it is dissolved in water, and the KOH alkali solution is added dropwise under stirring conditions until the precipitation is complete, and then filtered to obtain Al(OH) 3 , Ni(OH) 2 and Ce(OH) 4 mixture. Add ethylene glycol to the mixed precipitate, mix well, and dry it under N 2 Calcined at 450°C for 4h under atmosphere to obtain carbon-containing oxides. Pass carbon oxides through N 2 -H 2 (10%) reduction for 1 h, the reduction temperature is 500°C. Then use HF-N 2 The mixed gas (molar ratio 1:4) was treated at 400° C. for 4 hours to obtain the catalyst of the present invention.

[0036] The catalyst prepared in this example was applied to the gas-phase fluorination of 1,1,1,2-tetrafluoroethane for dehydrofluorination to synthesize trifluoroethylene. Table 1 shows the...

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Abstract

The invention provides a catalyst for synthesizing trifluoroethylene and a preparation method thereof. The main active component of the catalyst is a mixture of single element Ni (nickel), NiF2 (nickel fluoride), AlF3 (aluminum fluoride), C (carbon) and additives M (Ce (cerium) and Pd (palladium)). The preparation method of the catalyst comprises the following steps of mixing an aluminum-containing compound, a nickel-containing compound and an M-containing compound, dissolving into water, and adding ammonia water until completely precipitating, so as to obtain a mixture of Al(OH)3 (aluminum hydroxide), Ni(OH)2 (nickel hydroxide) and M(OH)n; adding polyols into the mixture of Al(OH)3, Ni(OH)2 and M(OH)n, mixing, drying, and roasting under the inert atmosphere, so as to obtain a carbon-containing composite oxide; reducing the carbon-containing composite oxide by hydrogen-containing mixed gas, and treating by hydrogen fluoride-containing mixed gas, so as to obtain the catalyst. The prepared catalyst has the advantages that the activity is high, the service life is long, the anti-coking ability is strong, and the like; the catalyst is especially suitable for 1,1,1,2-tetrafluoroethane to remove hydrogen fluoride to synthesize the trifluoroethylene.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for dehydrofluorination of 1,1,1,2-tetrafluoroethane to synthesize trifluoroethylene. Background technique [0002] Trifluoroethylene (TrFE), as an important fluorine-containing olefin, is currently mainly used in the synthesis of fluoropolymers. This type of fluoropolymer not only has thermal stability, chemical resistance stability and UV resistance stability, but also has the solubility and melt processability of conventional polymers, and also has ferroelectricity, piezoelectricity, Unique electrical properties such as pyroelectricity and high dielectricity have wide application value in electronics, military, medical and other industries. [0003] The preparation of trifluoroethylene at home and abroad is mainly prepared by hydrogenolysis and dechlorination on noble metal (palladium or platinum) catalysts. The use of noble metal ...

Claims

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Application Information

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IPC IPC(8): B01J27/128B01J27/13C07C17/25C07C21/18
CPCB01J27/128B01J27/13C07C17/25C07C21/18
Inventor 陈焱锋朱志荣贾文志吴君毅
Owner SHANGHAI 3F NEW MATERIAL TECH CO LTD
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