Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-017/20
C07C-017/38
출원번호
UP-0842652
(2007-08-21)
등록번호
US-7781626
(2010-09-13)
발명자
/ 주소
Pham, Hang T.
Singh, Rajiv R.
Tung, Hsueh S.
출원인 / 주소
Honeywell International Inc
대리인 / 주소
Bradford, Bruce
인용정보
피인용 횟수 :
2인용 특허 :
31
초록▼
The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful
The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
대표청구항▼
What is claimed is: 1. A process for separating 1,1,1,3,3-pentafluorobutane from an azeotropic mixture of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride comprising the steps of: (A) providing a process stream derived from the production of 1,1,1,3,3-pentafluorobutane, wherein said process stream
What is claimed is: 1. A process for separating 1,1,1,3,3-pentafluorobutane from an azeotropic mixture of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride comprising the steps of: (A) providing a process stream derived from the production of 1,1,1,3,3-pentafluorobutane, wherein said process stream comprises a mixture comprising an azeotrope-like composition consisting essentially of about 90 weight percent to about 96 weight percent of 1,1,1,3,3-pentafluorobutane and from about 4 weight percent to about 10 weight percent of hydrogen fluoride; (B) distilling said mixture comprising said azeotrope-like composition at a first pressure to produce a first overhead stream enriched in either the 1,1,1,3,3-pentafluorobutane or the hydrogen fluoride and a first bottoms stream enriched in the other component; and (C) redistilling the first overhead stream at a second pressure to produce a second overhead stream enriched in the component enriched in the first bottoms stream and a second bottoms stream enriched in the component enriched in the first overhead stream. 2. The process of claim 1 wherein one of said first distillation pressure and said second distillation pressure is a high pressure selected from the range of about 50 psia to about 400 psia and the other of said first distillation pressure and said second distillation pressure is a low pressure selected from the range of about 5 psia to about 50 psia. 3. The process of claim 2 wherein said high pressure is selected from the range of about 100 psia to about 250 psia. 4. The process of claim 1 wherein said distillation steps are performed as a continuous process. 5. The method of claim 1 wherein said distilling step and said redistilling step occur in series in separate distillation columns. 6. The process of claim 1 wherein said mixture further comprises an impurity selected from the group consisting of one or more by-products, reaction intermediates, or unreacted reactants derived from said production of 1,1,1,3,3-pentafluorobutane. 7. The process of claim 1 wherein said mixture further comprises 1,1,1,3,3-hexachlorobutane. 8. The method of claim 1 wherein said distilling step and said redistilling step occur sequentially in a single distillation column. 9. The process of claim 3 wherein said high pressure is selected from the range of about 150 psia to about 220 psia. 10. The process of claim 2 wherein said low pressure is selected from the range of about 5 psia to about 35 psia. 11. The process of claim 10 wherein said low pressure is selected from the range of about 5 psia to about 25 psia. 12. The process of claim 2 wherein said low pressure is selected from the range of about 5 psia to about 20 psia.
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이 특허에 인용된 특허 (31)
Pham, Hang T.; Singh, Rajiv R.; Tung, Hsueh S., Azeotrope-like compositions of 1,1,1,3,3-pentafluorobutane and hydrogen fluoride.
Manzer Leo E. (Wilmington DE) Rao V. N. Mallikarjuna (Wilmington DE) Rockwell Richard T. (Corpus Christi TX) Sisk Michael A. (Corpus Christi TX) Warwas Edwin J. (Wilmington DE) Winteringham Roy (Hock, Azeotropes of HF and process for the separation of HF via azeotropic distillation.
Lambert, Alain; Wilmet, Vincent, Method for separating a mixture comprising at least an hydrofluoroalkane and hydrogen fluoride, methods for preparing a hydrofluoroalkane and azeotropic compositions.
Alain Lambert BE; Vincent Wilmet BE, Method for separating hydrogen fluoride from its mixtures with 1,1,1,3,3-pentafluorobutane and method for making 1,1,1,3,3-pentafluorobutane.
Shibanuma Takashi,JPX ; Homoto Yukio,JPX ; Komatsu Satoshi,JPX ; Yoshimura Toshikazu,JPX, Method of producing 1,1,1,2,2-pentafluoroethane, a method of producing 2,2-dichloro-1,1,1-trifluoroethane, and a method.
Solinas Giampaolo (Castellanza ITX) Basile Giampiero (Alessandria ITX), Process for separating HF from its mixtures with hydrochlorofluorocarbons 123 and/or 124.
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Balthasart Dominique (Brussels BEX) Decap Philippe (Woluwe-St-Pierre BEX), Process for separation of 1,1-difluoroethane from its mixture with hydrogen fluoride.
Van Der Puy Michael (Cheektowage NY) Madhavan G. V. Bindu (Amherst NY) Demmin Timothy R. (Grand Island NY), Process for the preparation of hydrofluorocarbons having 3 to 7 carbon atoms.
Manzer Leo E. (Wilmington DE) Rao V. N. Mallikarjuna (Wilmington DE) Rockwell Richard T. (Corpus Christi TX) Sisk Michael A. (Corpus Christi TX) Warwas Edwin J. (Wilmington DE) Winteringham Roy (Hock, Process for the separation of HF via phase separation and distillation.
Lambert,Alain; Wilmet,Vincent, Process for the separation of a mixture comprising at least one hydrofluoroalkane and hydrogen fluoride, processes for the preparation of a hydrofluoroalkane and azeotropic compositions.
Galland Jean-Michel (Vernaison FRX) Perdriau Ren (Lyons FRX) Rouzies Dominique (Lyons FRX), Process for the separation of hydrogen fluoride from its mixtures with 1,1,1-trifluoro-2-chloroethane.
Herkelmann Ralf,DEX ; Brosch Carsten,DEX ; Wilmet Vincent,BEX, Process for the separation of hydrogen fluoride from its mixtures with a hydrofluoroalkane containing from 3 to 6 carbon atoms.
Reif, Ferdinand; Balthasart, Dominique, Processes for the synthesis of pentafluorobutane and the separation of hydrogen fluoride and pentafluorobutane mixtures.
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