Process for the separation of HF via phase separation and distillation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-003/10
C07C-025/00
출원번호
US-0226736
(1988-08-01)
발명자
/ 주소
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
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
18인용 특허 :
4
초록▼
Process for the separation of HF, 2,2-dichloro-1,1,1-trifluoroethane (FC-123) and/or 2-chloro-1,1,1,2-tetrafluoroethane (FC-124) mixture by subjecting the mixture to a temperature from about -80°C. to about 40°C. and a pressure from about 0.10 MPa to about 3.55 MPa in a separation zone, whereby an o
Process for the separation of HF, 2,2-dichloro-1,1,1-trifluoroethane (FC-123) and/or 2-chloro-1,1,1,2-tetrafluoroethane (FC-124) mixture by subjecting the mixture to a temperature from about -80°C. to about 40°C. and a pressure from about 0.10 MPa to about 3.55 MPa in a separation zone, whereby an organic phase having less than 15 mole percent of HF is formed as the bottom layer in the separation zone and an acid phase having at least 93 mole percent of HF is formed at the top in the separation zone.
대표청구항▼
A Process for the separation of hydrogen fluoride from a mixture consisting essentially of hydrogen fluoride and at least one of 2,2-dichloro-1,1,1-trifluoroethane, and 2-chloro-1,1,1,2-tetrafluoroethane and minor amounts of halogenated materials consisting essentially of a combination of phase sepa
A Process for the separation of hydrogen fluoride from a mixture consisting essentially of hydrogen fluoride and at least one of 2,2-dichloro-1,1,1-trifluoroethane, and 2-chloro-1,1,1,2-tetrafluoroethane and minor amounts of halogenated materials consisting essentially of a combination of phase separation and distillation, said process comprising: (a) condensing the mixture to a temperature from about -80°C. to about 40°C. and a pressure from about 0.10 MPa to about 3.55 MPa, in a separation zone so that an organic phase consisting essentially of at least 85 mole percent of at least one of 2,2-dichloro-1,1,1-trifluoroethane, and 2-chloro-1,1,1,2-tetrafluoroethane and less than 15 mole percent of HF is formed as the bottom layer in the separation zone and an acid phase consisting essentially of at least 93 mole percent of HF and less than 7 mole percent of at least one of 2,2,-dichloro-1,1,1-trifluoroethane, and 2-chloro-1,1,1,2-tetrafluoroethane is formed as the top layer in the separation zone, (b) removing the acid phase from the top of the separation zone, (c) feeding the acid phase from (b) to a distillation column at a temperature from about -4°C. to about 133°C. and a pressure from about 0.10 MPa to 3.55 MPa to form an azeotrope containing HF at the top of the distillation column and HF at the bottom of the distillation column, and (d) recovering the HF from the bottom of the distillation column.
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이 특허에 인용된 특허 (4)
van Eijl A. Theodorus (Terneuzen NL), Method of recovering HF from mixtures containing C1-C3halocarbon compounds.
Merchant Dhirendra Ranchhoddas (Paducah KY) Hodges Jimmie Ray (Benton KY), Removal of hydrogen fluoride from gaseous mixture by absorption on alkaline earth metal fluoride.
Homoto Yukio,JPX ; Shibanuma Takashi,JPX ; Nishitsuji Masanobu,JPX, Process of separating pentafluoroethane and process of producing pentafluoroethane using the same.
Miller Ralph Newton ; Rao V. N. Mallikarjuna ; Swearingen Steven H., Processes for the purification and use of 2,2-dichloro-1,1,1,3,3,3-hexafluoropropane and azeotropes thereof with HF.
Miller, Ralph Newton; Rao, V. N. Mallikarjuna; Swearingen, Steven H., Processes for the purification and use of 2-chloro-1,1,1,2,3,3,3-heptafluoropropane and zeotropes thereof with HF.
Reif, Ferdinand; Balthasart, Dominique, Processes for the synthesis of pentafluorobutane and the separation of hydrogen fluoride and pentafluorobutane mixtures.
Seseke-Koyro Ulrich (Vellmar DEX) Grossmann Andreas (Sehnde DEX) Rudolph Werner (Hanover DEX), Removal of water and/or hydrocarbons from hydrogen fluoride.
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