GB1034894A - Improvements in or relating to fluorocarbon separation - Google Patents
Improvements in or relating to fluorocarbon separationInfo
- 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
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.
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)
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 |
BR9402038A (en) * | 1993-05-25 | 1995-03-07 | Showa Denko Kk | Pentafluor ethane purification process |
DE69516412T2 (en) * | 1994-08-17 | 2000-09-21 | Daikin Ind Ltd | METHOD FOR PRODUCING PENTAFLUORETHANE |
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)
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 |
NL264123A (en) * | 1960-04-28 | |||
FR1293690A (en) * | 1960-04-28 | 1962-05-18 | Du Pont | Process for the extractive distillation of fluorinated carbides |
US3152051A (en) * | 1962-03-12 | 1964-10-06 | Pennsalt Chemicals Corp | Separation of a mixture containing tetrafluoroethylene and fluoroform by extractive distillation |
-
0
- NL NL131714D patent/NL131714C/xx active
-
1963
- 1963-02-06 US US256520A patent/US3282801A/en not_active Expired - Lifetime
-
1964
- 1964-01-22 DE DEP33431A patent/DE1295543B/en active Pending
- 1964-02-05 FR FR962672A patent/FR1381844A/en not_active Expired
- 1964-02-06 GB GB5155/64A patent/GB1034894A/en not_active Expired
- 1964-02-06 NL NL6400982A patent/NL6400982A/xx unknown
- 1964-02-06 BE BE643472A patent/BE643472A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6400982A (en) | 1964-08-07 |
BE643472A (en) | 1964-08-06 |
DE1295543B (en) | 1969-05-22 |
NL131714C (en) | |
US3282801A (en) | 1966-11-01 |
FR1381844A (en) | 1964-12-14 |
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