Method for separating and recovering 2,3,3,3-tetrafluoropropene and hydrofluoric acid
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-017/38
C07C-021/18
C07C-017/42
C07C-017/25
C07C-017/20
C01B-007/19
C07C-017/35
출원번호
US-0131036
(2012-06-14)
등록번호
US-9266799
(2016-02-23)
우선권정보
FR-11 56208 (2011-07-08)
국제출원번호
PCT/FR2012/051327
(2012-06-14)
§371/§102 date
20140605
(20140605)
국제공개번호
WO2013/007906
(2013-01-17)
발명자
/ 주소
Deur-Bert, Dominique
Collier, Bertrand
출원인 / 주소
Arkema France
대리인 / 주소
Brinks, Gilson & Lione
인용정보
피인용 횟수 :
0인용 특허 :
2
초록▼
The present invention relates to a method for separating a composition containing 2,3,3,3-tetrafluoropropene and hydrofluoric acid, and for recovering the thus-separated 2,3,3,3-tetrafluoropropene and hydrofluoric acid. The invention also relates to a method for manufacturing and purifying 2,3,3,3-t
The present invention relates to a method for separating a composition containing 2,3,3,3-tetrafluoropropene and hydrofluoric acid, and for recovering the thus-separated 2,3,3,3-tetrafluoropropene and hydrofluoric acid. The invention also relates to a method for manufacturing and purifying 2,3,3,3-tetrafluoropropene using a hydrofluorination reaction of the saturated or unsaturated compound having three carbon atoms and including at least one chlorine atom in the presence of a fluorination catalyst.
대표청구항▼
1. A process for separating and recovering 2,3,3,3-tetrafluoropropene and HF from a composition comprising 2,3,3,3-tetrafluoropropene and HF, said process comprising cooling said composition at a temperature of between −5 and 35° C. in the presence of an added amount of at least one compound (C1), w
1. A process for separating and recovering 2,3,3,3-tetrafluoropropene and HF from a composition comprising 2,3,3,3-tetrafluoropropene and HF, said process comprising cooling said composition at a temperature of between −5 and 35° C. in the presence of an added amount of at least one compound (C1), whereby said separating occurs by settling and wherein C1 is selected from the group consisting of chlorocarbons, hydrochlorocarbons, hydrochlorofluorocarbons, optionally fluorinated alcohols, optionally fluorinated ethers, ketones, esters, polyols and hydrofluorinated ethers, in order to give an upper phase rich in HF and a lower organic phase rich in 2,3,3,3-tetrafluoropropene and compound C1. 2. The process as claimed in claim 1, characterized in that the 2,3,3,3-tetrafluoropropene/HF molar ratio in the composition is between 0.5 and 2.5. 3. The process as claimed in claim 1, characterized in that the amount of compound C1 to be added represents from 5% to 95% by weight, with respect to the 2,3,3,3-tetrafluoropropene/HF composition. 4. The process as claimed in claim 1, further comprising hydrofluorinating at least one saturated or unsaturated hydrocarbon compound having three carbon atoms and at least one chlorine atom in the presence of a fluorination catalyst to produce the composition comprising 2,3,3,3-tetrafluoropropene and HF. 5. The process as claimed in claim 4, characterized in that the saturated or unsaturated hydrocarbon compound having three carbon atoms is selected from the group consisting of 1,1,1,2,3-pentachloropropane, 1,1,2,3-tetrachloropropene and 2-chloro-3,3,3-trifluoropropene. 6. The process as claimed in claim 4, further comprising removing HCl from the composition resulting from the hydrofluorination reaction before the cooling stage. 7. The process as claimed in claim 1, characterized in that the compound C1 is selected from the group consisting of 1,1,1,2,3-pentachloropropane, 1,1,2,3-tetrachloro-1-fluoropropane, 1,2-dichloro-3,3,3-trifluoropropane, 1,1,2,3-tetrachloropropene and 2-chloro-3,3,3-trifluoropropene. 8. The process as claimed in claim 1, characterized in that the compound C1 is selected from the group consisting of alcohols ROH, ketones RCOR′, esters RCOOR′, with R and R′, which are identical or different, each representing an alkyl group of 1 to 5 carbon atoms, and ethers ROR′, with R and R′, which are identical or different, each representing an alkyl group of 1 to 7 carbon atoms. 9. The process as claimed in claim 4, characterized in that the compound C1 is the same compound as that which was reacted with HF in the hydrofluorination reaction. 10. The process as claimed in claim 4, further comprising recycling the phase enriched in HF after the cooling stage to the hydrofluorination reaction. 11. The process as claimed in claim 1, further comprising separating 2,3,3,3-tetrafluoropropene from the organic phase enriched in 2,3,3,3-tetrafluoropropene after the cooling stage. 12. The process as claimed in claim 11, further comprising recycling the organic phase, after separation of 2,3,3,3-tetrafluoropropene to the cooling stage and/or to the hydrofluorination reaction stage. 13. A process for the manufacture of 2,3,3,3-tetrafluoropropene, comprising (i) at least one reaction stage comprising reacting 1,1,1,2,3-pentachloropropane in the gas phase with HF in the presence of a fluorination catalyst to give a stream comprising 2,3,3,3-tetrafluoropropene and its intermediates, HCl and excess HF; (ii) removing HCl from the stream exiting from the reaction stage (i) to give a stream comprising 2,3,3,3-tetrafluoropropene and HF; (iii) cooling the stream exiting from stage (ii) to a temperature of between −5 and 35° C. in the presence of additional 1,1,1,2,3-pentachloropropane whereby the stream comprising 2,3,3,3-tetrafluoropropene and HF is separated by settling to produce an upper phase rich in HF and a lower organic phase rich in 2,3,3,3-tetrafluoropropene and comprising 1,1,1,2,3-pentachloropropane; (iv) separating the 2,3,3,3-tetrafluoropropene from the lower organic phase and optionally recycling the 1,1,1,2,3-pentachloropropane to the cooling stage (iii) and/or to the reaction stage (i); (v) purifying the 2,3,3,3-tetrafluoropropene and (vi) optionally recycling the upper phase rich in HF to stage (i). 14. The process as claimed in claim 13, further comprising distilling HF before removing HCl in stage (ii).
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (2)
Merkel, Daniel C.; Tung, Hsueh Sung; Pokrovski, Konstantin A.; Bektesevic, Selma; Johnson, Robert C.; Wang, Haiyou, Integrated process to produce 2,3,3,3-tetrafluoropropene.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.