Method for producing trifluoroethylene
AssigneeAsahi Glass Company, Limited
InventorsMasahiko Nakamura, Hidekazu Okamoto
Life of this patent
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Abstract
To provide a production process with high degree of conversion of HFC-134a and selectivity for HFO-1123, with a high productivity of HFO-1123 and with a small load in process of purification and recovery. A process for producing HFO-1123, which comprises bringing a material gas having a proportion of HFC-134a based on the total amount of a diluent gas and HFC-134a of from 50 to 100 mol % into contact with a dehydrofluorination catalyst to convert part of HFC-134a into HFO-1123, then removing hydrogen fluoride in a reaction product gas, and then bringing the reaction product gas from which hydrogen fluoride has been removed into contact with a dehydrofluorination catalyst to convert at least part of unreacted HFC-134a into HFO-1123.
Claims13
A process for producing trifluoroethylene, the process comprising:
- bringing a 1,1,1,2-tetrafluoroethane gas or a 1,1,1,2-tetrafluoroethane gas diluted with a diluent gas, wherein a proportion of 1,1,1,2-tetrafluoroethane based on the total amount of the diluent gas and 1,1,1,2-tetrafluoroethane is at least 50 mol %, into contact with a first dehydrofluorination catalyst in a first reactor, thereby converting a part of 1,1,1,2-tetrafluoroethane into trifluoroethylene, and wherein moisture is formed as a by-product,
- conducting a treatment other than removal of hydrogen fluoride that does not change components in the first reactor other than a content of moisture in a reaction product gas,
- removing hydrogen fluoride from the obtained reaction product gas, and
- bringing the reaction product gas from which hydrogen fluoride has been removed into contact with a second dehydrofluorination catalyst in a second reactor, thereby convening at least a part of 1,1,1,2-tetrafluoroethane into trifluoroethylene.
Dependencies are inferred from the claim text.