Process for the preparation of 1,1,1,3,3,3-hexafluoropropane and at least one of 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C07C-017/10
C07C-017/00
출원번호
US-0572625
(2004-10-13)
등록번호
US-7285691
(2007-10-23)
국제출원번호
PCT/US04/034447
(2004-10-13)
§371/§102 date
20060317
(20060317)
국제공개번호
WO05/037742
(2005-04-28)
발명자
/ 주소
Rao,Velliyur Nott Mallikarjuna
Sievert,Allen C.
출원인 / 주소
E.I. du Pont de Nemours and Company
인용정보
피인용 횟수 :
6인용 특허 :
13
초록▼
A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and at least one 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea). The process involves (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCl=CX2 (wher
A process is disclosed for the manufacture of 1,1,1,3,3,3-hexafluoropropane (HFC-236fa) and at least one 1,1,1,2,3,3-hexafluoropropane (HFC-236ea) and 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea). The process involves (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCl=CX2 (where each X is independently F or Cl) to produce a product including both CF3CCl2CF3 and CF3CClFCClF2; (b) reacting CF3CCl2CF3 and CF3CClFCClF2 produced in (a) with hydrogen to produce a product comprising CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3, and CF3CHFCF3; and (c) recovering from the product produced in (b), CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3 and CF3CHFCF3. In (a), the CF3CCl2CF3 and CF3CClFCClF2 are produced in the presence of a chlorofluorination catalyst including a ZnCr2O4/crystalline α-chromium oxide composition, a ZnCr2O4/crystalline α-chromium oxide composition which has been treated with a fluorinating agent, a zinc halide/α-chromium oxide composition and/or a zinc halide/α-chromium oxide composition which has been treated with a fluorinating agent.
대표청구항▼
What is claimed is: 1. A process for the manufacture of 1,1,1,3,3,3-hexafluoropropane and at least one compound selected from the group consisting of 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane, comprising: (a) reacting HF, Cl2, and at least one halopropene of the formula CX3
What is claimed is: 1. A process for the manufacture of 1,1,1,3,3,3-hexafluoropropane and at least one compound selected from the group consisting of 1,1,1,2,3,3-hexafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane, comprising: (a) reacting HF, Cl2, and at least one halopropene of the formula CX3CCl═CX2, wherein each X is independently selected from the group consisting of F and Cl, to produce a product comprising CF3CCl2CF3 and CF3CClFCClF2, wherein said CF3CCl2CF3 and CF3CClFCClF2 are produced in the presence of a chlorofluorination catalyst comprising at least one composition selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide, (ii) compositions comprising a zinc halide and α-chromium oxide and (iii) compositions of (i) or (ii) which have been treated with a fluorinating agent; (b) reacting CF3CCl2CF3 and CF3CClFCClF2 produced in (a) with hydrogen, optionally in the presence of HF, to produce a product comprising CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3, and CF3CHFCF3; and (c) recovering from the product produced in (b), CF3CH2CF3 and at least one compound selected from the group consisting of CHF2CHFCF3 and CF3CHFCF3. 2. The process of claim 1 wherein the halopropene reactant is contacted with Cl2 and HF in a pre-reactor. 3. The process of claim 1 wherein the halopropene reactant is contacted with HF in a pre-reactor. 4. The process of claim 1 wherein the reaction of (b) is conducted in a reaction zone which is unpacked or packed with a nickel alloy at a temperature of from about 350째 C. to about 600째 C. 5. The process of claim 1 wherein the reaction of (b) is conducted in a reaction zone containing a hydrogenation catalyst at a temperature of from about 100째 C. to about 350째 C. 6. The process of claim 1 wherein in (a) the catalyst is selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide and (iii) compositions of (i) which have been treated with a fluorinating agent. 7. The process of claim 6 wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 1 atom % to about 25 atom %. 8. The process of claim 6 wherein the catalyst is selected from the group consisting of (i) compositions comprising ZnCr2O4 and crystalline α-chromium oxide wherein the ZnCr2O4 contains between about 10 atom percent and 67 atom percent of the chromium in the composition and at least about 70 atom percent of the zinc in the composition, and wherein at least about 90 atom percent of the chromium present as chromium oxide in the composition is present as ZnCr2O4 or crystalline α-chromium oxide and (iii) compositions of (i) which have been treated with a fluorinating agent. 9. The process of claim 1 wherein in (a) the catalyst is selected from the group consisting of (ii) compositions comprising a zinc halide and α-chromium oxide and (iii) compositions of (ii) which have been treated with a fluorinating agent. 10. The process of claim 9 wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 0.1 atom % to about 25 atom %. 11. The process of claim 9 wherein the catalyst is selected from the group consisting of (ii) compositions wherein a zinc halide is supported on a support comprising α-chromium oxide and (iii) compositions of (ii) which have been treated with a fluorinating agent; and wherein the amount of zinc relative to the total of chromium and zinc in the catalyst composition is from about 2 atom % to about 10 atom %.
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이 특허에 인용된 특허 (13)
Lerou, Jan J., Chromium oxide catalyst composition.
Webster James L. (Parkersburg WV) McCann Elrey L. (Mendenhall PA) Bruhnke Douglas W. (Landenberg PA) Lerou Jan J. (Chadds Ford PA) Manogue William H. (Newark DE) Manzer Leo E. (Wilmington DE) Swearin, Multistep synthesis of hexafluoropropylene.
Webster James L. (Parkersburg WV) Trofimenko Swiatoslaw (Wilmington DE) Resnick Paul R. (Wilmington DE) Bruhnke Douglas W. (Landenberg PA) Lerou Jan J. (Chadds Ford PA) Manogue William H. (Newark DE), Multistep synthesis of hexafluoropropylene.
Baker Ralph Thomas ; Petrov Viacheslav Alexandrovich ; Rao Velliyur Nott Mallikarjuna ; Sievert Allen Capron, Process for the manufacture of halocarbons and selected compounds and azeotropes with HF.
Sievert, Allen Capron; Rao, V. N. Mallikarjuna, Process for the production of hexafluoropropylene from CC1F2CC1FCF3 and azeotropes of CC1F2CC1FCF3 with HF.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process for the preparation of 1,1,1,3,3-penta-fluoropropane and/or 1,1,1,3,3,3-hexafluoropropane.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process for the preparation of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3-pentafluoropropane.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process for the preparation of 1,1,3,3,3-pentafluoropropene and 1,2,3,3,3-pentafluoropropene.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process for the preparation of 1,3,3,3-tetrafluoropropene and/or 1,1,3,3,3-pentafluoropropene.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process for the preparation of 1,3,3,3-tetrafluoropropene and/or 2,3,3,3-tetrafluoropropene.
Rao, Velliyur Nott Mallikarjuna; Rosenfeld, H. David; Sievert, Allen Capron; Subramoney, Shekhar, Process or the preparation of 1,1,1,3,3,3-hexafluoro-propane and at least one of 1,1,1,2,3,3-hexafluoropropane, hexafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane.
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