AZEOTROPIC OR AZEOTROPE LIKE COMPOSITION, AND METHOD FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE OR CHLOROMETHANE

AZEOTROPIC OR AZEOTROPE LIKE COMPOSITION, AND METHOD FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE OR CHLOROMETHANE

To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition comprising HFO-1234yf and R40. An azeotrope-like composition comprising from 58 to 78 mol% of HFO-1234yf and from 22 to 42 mol% of R40, and a method for producing HFO-123...

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Hauptverfasser: OTSUKA, Tetsuo, FURUTA, Shoji
Format: Patent
Sprache:eng ; fre ; ger
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ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
POLISHES
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creator OTSUKA, Tetsuo
FURUTA, Shoji
description To provide a method for efficiently separating 2,3,3,3-tetrafluoropropene (HFO-1234yf) and chloromethane (R40) from a composition comprising HFO-1234yf and R40. An azeotrope-like composition comprising from 58 to 78 mol% of HFO-1234yf and from 22 to 42 mol% of R40, and a method for producing HFO-1234yf, which comprises steps of distilling an initial mixture containing HFO-1234yf in a content exceeding 63 mol% in the total amount of HFO-1234yf and R40, thereby to separate the initial mixture into a first fraction in which the content of HFO-1234yf in the total amount of HFO-1234yf and R40 is lower than the content of HFO-1234yf in the total amount of HFO-1234yf and R40 in the initial mixture, and a second fraction in which the content of HFO-1234yf in the total amount of HFO-1234yf and R40 is higher than the content of HFO-1234yf in the total amount of HFO-1234yf and R40 in the initial mixture, and then obtaining HFO-1234yf having a reduced R40 concentration, from the second fraction.
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subjects ACYCLIC OR CARBOCYCLIC COMPOUNDS
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC CHEMISTRY
PAINTS
POLISHES
title AZEOTROPIC OR AZEOTROPE LIKE COMPOSITION, AND METHOD FOR PRODUCING 2,3,3,3-TETRAFLUOROPROPENE OR CHLOROMETHANE
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