METHOD FOR PRODUCING TETRAFLUOROETHYLENE

There is provided a process for recovering tetrafluoroethylene wherein an amount of energy required to obtain TFE is reduced. In the process for producing a TFE mixture as an intended mixture which contains TFE at a higher concentration from a raw material mixture (10) which contains TFE, a componen...

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Bibliographische Detailangaben
Hauptverfasser:	YOSHII, SHIGEYUKI, HOMOTO, YUKIO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	There is provided a process for recovering tetrafluoroethylene wherein an amount of energy required to obtain TFE is reduced. In the process for producing a TFE mixture as an intended mixture which contains TFE at a higher concentration from a raw material mixture (10) which contains TFE, a component of which boiling point is lower than that of TFE and a component of which boiling point is higher than that of TFE, (1) the raw material is subjected to a preliminary distillation treatment (12) so as to obtain (a) a first fraction (15) which contains at least a portion of the component of which boiling point is higher than that of TFE and (b) a second fraction (14) as the balance which contains TFE and the component of which boiling point is lower than that of TFE, and then (2) the second fraction is subjected to a main distillation treatment (16) so as to obtain (c) a third faction (20) formed by distilling off the component of which boiling point is lower than that of TFE, and (d) a fourth fraction (18) as the intended mixture being the balance which contains TFE.