GB1034894A - Improvements in or relating to fluorocarbon separation - Google Patents

Improvements in or relating to fluorocarbon separation

Info

Publication number
GB1034894A
GB1034894A GB5155/64A GB515564A GB1034894A GB 1034894 A GB1034894 A GB 1034894A GB 5155/64 A GB5155/64 A GB 5155/64A GB 515564 A GB515564 A GB 515564A GB 1034894 A GB1034894 A GB 1034894A
Authority
GB
United Kingdom
Prior art keywords
mixture
separated
fluorocarbon
relating
separation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5155/64A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1034894A publication Critical patent/GB1034894A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C07C17/383—Separation; Purification; Stabilisation; Use of additives by distillation
    • C07C17/386—Separation; Purification; Stabilisation; Use of additives by distillation with auxiliary compounds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S62/00—Refrigeration
    • Y10S62/918—Halocarbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Tetrafluoromethylene is separated from mixtures thereof with volatile non-perfluorinated fluorocarbons which, in addition to fluorine, contain at least one element selected from hydrogen, chlorine, bromine and iodine by adding to the mixture an alcohol or phenol, ether, ketone or ester of the general formulae R1OH, R2OR3, R4COR5 and R6CO.OR7, wherein R1 to R7 are saturated aliphatic or aromatic hydrocarbon radicals, and which is liquid at the distillation conditions and then fractionally distilling the mixture. The distillation agents preferably contain 1 to 12 carbon atoms in their molecule and the mixture to be separated may be prepared by the pyrolysis of chlorodifluoromethane or of bromodifluoromethane or by inorganic and organic fluoride arc processes known to produce tetrafluoroethylene.
GB5155/64A 1963-02-06 1964-02-06 Improvements in or relating to fluorocarbon separation Expired GB1034894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US256520A US3282801A (en) 1963-02-06 1963-02-06 Extractive distillation of tetrafluoroethylene with an oxygenated hydrocarbon

Publications (1)

Publication Number Publication Date
GB1034894A true GB1034894A (en) 1966-07-06

Family

ID=22972533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5155/64A Expired GB1034894A (en) 1963-02-06 1964-02-06 Improvements in or relating to fluorocarbon separation

Country Status (6)

Country Link
US (1) US3282801A (en)
BE (1) BE643472A (en)
DE (1) DE1295543B (en)
FR (1) FR1381844A (en)
GB (1) GB1034894A (en)
NL (2) NL6400982A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1251300B (en) * 1964-12-29 1967-10-05 E I du Pont de Nemours and Company Wilmington Del (V St A) Process for the purification of hexafluoropropylene epoxide with separation of hexafluoropropylene
CH459991A (en) * 1964-12-30 1968-07-31 Ciba Geigy Process for the separation of mixtures of cycloaliphatic fluorine compounds
BE786675A (en) * 1971-08-02 1973-01-25 Airco Inc SEPARATION OF ALKYL HALOGENOUS OXIDES BY AZEOTROPIC DISTILLATION.
US3989601A (en) * 1975-09-08 1976-11-02 The Dow Chemical Company Purification of 1,1,1-trichloroethane by extractive distillation
DE2638650C2 (en) * 1976-08-27 1982-11-25 Hoechst Ag, 6000 Frankfurt Process for the separation of tetrafluoroethylene from gas mixtures
US4134796A (en) * 1977-11-17 1979-01-16 Asahi Glass Company Ltd. Method of purifying hexafluoropropylene oxide
FR2409973A1 (en) * 1977-11-28 1979-06-22 Asahi Glass Co Ltd Extractive distn. of hexa:fluoro:propylene epoxide - in presence of chlorinated hydrocarbon or ether solvent to give hexa:fluoro:propylene
DE3729106A1 (en) * 1987-09-01 1989-03-09 Hoechst Ag PROCESS FOR OBTAINING PURE TETRAFLUOROETHYLENE
US5049241A (en) * 1990-03-27 1991-09-17 E. I. Du Pont De Nemours And Company Extractive distillation
AU684757B2 (en) * 1993-05-25 1998-01-08 Showa Denko Kabushiki Kaisha Purification process of pentafluoroethane
EP0778254B1 (en) * 1994-08-17 2000-04-19 Daikin Industries, Limited Process for producing pentafluoroethane
WO1996023752A1 (en) * 1995-02-01 1996-08-08 E.I. Du Pont De Nemours And Company SEPARATING AND REMOVING IMPURITIES FROM 1,1,1-TRIFLUOROETHANE (HFC-143a) BY USING EXTRACTIVE DISTILLATION
US5626023A (en) * 1995-02-16 1997-05-06 Praxair Technology, Inc. Cryogenic rectification system for fluorine compound recovery using additive liquid
US6047560A (en) * 1997-03-12 2000-04-11 Showa Denko K.K. Process for separating pentafluoroethane and 1,1,1-trifluoroethane

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604439A (en) * 1952-07-22 Distillation of
US2339160A (en) * 1940-08-02 1944-01-11 Shell Dev Distillation process
US2473911A (en) * 1943-07-19 1949-06-21 Ici Ltd Production of fluorocarbons
US2357028A (en) * 1943-08-04 1944-08-29 Shell Dev Solvent extraction process
US2456184A (en) * 1946-04-17 1948-12-14 Du Pont Purification of tetrachlorethylene
FR1293690A (en) * 1960-04-28 1962-05-18 Du Pont Process for the extractive distillation of fluorinated carbides
NL264123A (en) * 1960-04-28
US3152051A (en) * 1962-03-12 1964-10-06 Pennsalt Chemicals Corp Separation of a mixture containing tetrafluoroethylene and fluoroform by extractive distillation

Also Published As

Publication number Publication date
FR1381844A (en) 1964-12-14
NL131714C (en)
US3282801A (en) 1966-11-01
BE643472A (en) 1964-08-06
DE1295543B (en) 1969-05-22
NL6400982A (en) 1964-08-07

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