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EP1178950A1 - Production de 1,1,1,2,3,3,3-heptafluoropropane - Google Patents

Production de 1,1,1,2,3,3,3-heptafluoropropane

Info

Publication number
EP1178950A1
EP1178950A1 EP00927586A EP00927586A EP1178950A1 EP 1178950 A1 EP1178950 A1 EP 1178950A1 EP 00927586 A EP00927586 A EP 00927586A EP 00927586 A EP00927586 A EP 00927586A EP 1178950 A1 EP1178950 A1 EP 1178950A1
Authority
EP
European Patent Office
Prior art keywords
hydrogen fluoride
phase
hfc
hfp
liquid
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.)
Withdrawn
Application number
EP00927586A
Other languages
German (de)
English (en)
Inventor
Robin R. Gibson
Greg Lyndon Summers
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.)
Ineos Fluor Holdings Ltd
Original Assignee
Ineos Fluor Holdings Ltd
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
Priority claimed from GBGB9911475.3A external-priority patent/GB9911475D0/en
Application filed by Ineos Fluor Holdings Ltd filed Critical Ineos Fluor Holdings Ltd
Publication of EP1178950A1 publication Critical patent/EP1178950A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C19/00—Acyclic saturated compounds containing halogen atoms
    • C07C19/08—Acyclic saturated compounds containing halogen atoms containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/07—Preparation of halogenated hydrocarbons by addition of hydrogen halides
    • C07C17/087—Preparation of halogenated hydrocarbons by addition of hydrogen halides to unsaturated halogenated hydrocarbons
    • 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

Definitions

  • the present invention relates to a process for the production of 1,1,1,2,3,3,3-heptafluoropropane from hexafluoropropene and to a process for the separation of mixtures comprising 1,1,1,2,3,3,3-heptafluoropropane and hydrogen fluoride.
  • reaction product phase-separates in the liquid phase to afford an organic-rich phase, which comprises HFC 227ea and HFP, and a hydrogen fluoride-rich phase.
  • the mole fraction of HF to 227ea in the reaction product may be from about 0.1 to 0.9.
  • the reaction mixture charged to the liquid-phase separator in Step (A) comprises an HFC 227ea/HF azeotrope, or azeotrope-like mixture, and optionally an HFP/HF azeotrope, or azeotrope-like mixture.
  • the reaction mixture charged to the liquid-phase separator in Step A may be the mixture arising directly from the reactor in which HFP is reacted with hydrogen fluoride (direct mixture). It is often preferred, however, that the mixture charged to the liquid-phase separator is essentially an HFC 227ea/hydrogen fluoride azeotrope, for example obtained from distillation of the direct mixture.
  • reaction of HFP with hydrogen fluoride in the process according to the first aspect of the present invention may be carried out in the liquid phase or in the vapour phase.
  • Step A is preferably carried out at below ambient temperature, typically at below 30°C.
  • Bottoms line (9) from the liquid-phase separator (7) is in fluid-flow communication with a second distillation column (10), which is for example a packed column.
  • Distillation column (10) is typically operated at a pressure of around 12 bars with a tops temperature of 37°C and a bottoms temperature of around 60°C.
  • Distillation column (10) is provided with an exit pipe for product (11) and a tops pipe (12).
  • a stream comprising HFP and essentially all the hydrogen fluoride content of the stream entering distillation column (10) via line (9) is removed from the top of distillation column (1Q) via line (12) and the product stream HFC 227ea is removed from the bottom of column (10) via exit pipe (11).
  • feed pipe (1) leads to a reactor (2), which optionally contains a fluorination catalyst.
  • Line (14) from reactor (2) is provided with a feed line (13) and is in fluid-flow communication with a liquid-phase separator (7).
  • Tops line (8) from the liquid-phase separator (7) is in fluid- flow communication with feed-pipe (1).
  • Bottoms line (9) from the liquid-phase separator (7) is in fluid-flow communication with a distillation column (10), which is for example a packed column.
  • Distillation column (10) is typically operated at a pressure of around 12 bars with a tops temperature of 37°C and a bottoms temperature of around 60°C.
  • Distillation column (10) is provided with an exit pipe for product (11) and a tops pipe (12) which is in fluid flow communication with line (14) to liquid-phase separator (7).
  • the organics-rich phase flows via bottoms line (9) to distillation column (10).
  • a stream comprising HFP and essentially all the hydrogen fluoride content of the stream entering distillation column (10) via line (9) is removed from the top of distillation column (10) via line (12) and returned to the liquid phase separator (7) via line (14).
  • the product stream HFC 227ea is removed from the bottom of column (10) via exit pipe (11).
  • compositions in the area of the figure designated A phase-separate namely compositions comprising 0.4-0.6 mole % HF, greater than 0.4 mole % HFP and less than 0.6 mole % HFC 227ea.
  • a phase-separate namely compositions comprising 0.4-0.6 mole % HF, greater than 0.4 mole % HFP and less than 0.6 mole % HFC 227ea.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

La présente invention concerne un procédé de préparation de 1,1,1,2,3,3,3-heptafluoropropane (HFC 227ea) consistant à faire réagir un hexafluoropropane (HFP) avec un fluorure d'hydrogène. Ledit procédé consiste: à charger le mélange réactionnel dans un séparateur en phase liquide; à permettre à une phase riche en HFC 227ea de se séparer par effet de gravité; à recycler la phase riche en fluorure d'hydrogène; à charger la phase riche en HFC 227ea dans une colonne de distillation; à récupérer séparément le HFC 227ea et un mélange riche en fluorure d'hydrogène contenus dans la colonne de distillation; puis à recycler le mélange riche en fluorure d'hydrogène dans le réacteur.
EP00927586A 1999-05-18 2000-05-15 Production de 1,1,1,2,3,3,3-heptafluoropropane Withdrawn EP1178950A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US13465799P 1999-05-18 1999-05-18
US134657P 1999-05-18
GBGB9911475.3A GB9911475D0 (en) 1999-05-18 1999-05-18 Production of 1,1,1,2,3,3,3-heptafluoropropane liquid phase separation
GB9911475 1999-05-18
PCT/GB2000/001861 WO2000069797A1 (fr) 1999-05-18 2000-05-15 Production de 1,1,1,2,3,3,3-heptafluoropropane

Publications (1)

Publication Number Publication Date
EP1178950A1 true EP1178950A1 (fr) 2002-02-13

Family

ID=26315556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00927586A Withdrawn EP1178950A1 (fr) 1999-05-18 2000-05-15 Production de 1,1,1,2,3,3,3-heptafluoropropane

Country Status (5)

Country Link
EP (1) EP1178950A1 (fr)
JP (1) JP2002544248A (fr)
AU (1) AU769137B2 (fr)
CA (1) CA2373437A1 (fr)
WO (1) WO2000069797A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1291337A1 (fr) * 2001-09-07 2003-03-12 SOLVAY (Société Anonyme) Procédé pour l'obtention d'heptafluoropropane purifié
US20070106099A1 (en) * 2005-11-10 2007-05-10 Pcbu Services, Inc. Production processes and systems
US8008243B2 (en) * 2008-10-31 2011-08-30 Honeywell International Inc. Azeotrope-like compositions of 1,1,2,3-tetrachloropropene and hydrogen fluoride
CN107635955A (zh) * 2015-05-21 2018-01-26 科慕埃弗西有限公司 通过SbF5进行的1233xf至244bb的氢氟化
CN117164427A (zh) * 2023-09-04 2023-12-05 临海市利民化工有限公司 一种七氟丙烷的制备方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2675496B1 (fr) * 1991-04-17 1993-09-03 Atochem Procede de separation du fluorure d'hydrogene de ses melanges avec le 1,1,1-trifluoro-2-chloroethane.
AU747117B2 (en) * 1997-11-25 2002-05-09 Ineos Fluor Holdings Limited Preparation of fluorine-containing organic compounds
DE69911186T2 (de) * 1998-04-03 2004-07-15 E.I. Du Pont De Nemours And Co., Wilmington Verfahren zur reinigung und verwendung von 2-chloro-1,1,1,2,3,3,3-heptafluorpropan und ihre azeotrope mit hf

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0069797A1 *

Also Published As

Publication number Publication date
JP2002544248A (ja) 2002-12-24
AU769137B2 (en) 2004-01-15
CA2373437A1 (fr) 2000-11-23
WO2000069797A1 (fr) 2000-11-23
AU4597700A (en) 2000-12-05

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