Processes for the production of fluoropropanes and halopropenes and azeotropic compositions of 2-chloro-3,3,3-trifluoro-1-propene with HF and of 1,1,1,2,2-pentafluoropropane with HF
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C09K-005/04
C07C-021/18
출원번호
US-0688720
(2012-11-29)
등록번호
US-8696926
(2014-04-15)
발명자
/ 주소
Rao, Velliyur Nott Mallikarjuna
Sievert, Allen Capron
출원인 / 주소
E I du Pont de Nemours and Company
인용정보
피인용 횟수 :
0인용 특허 :
21
초록▼
A process is disclosed for making CF3CH2CHF2, CF3CH═CHF and/or CF3CH═CHCl. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHClCH2X, halopropenes of the formula CX3CCl═CH2 and halopropenes of the formula CX2═CClCH2X, w
A process is disclosed for making CF3CH2CHF2, CF3CH═CHF and/or CF3CH═CHCl. The process involves reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHClCH2X, halopropenes of the formula CX3CCl═CH2 and halopropenes of the formula CX2═CClCH2X, wherein each X is independently F or Cl, with HF in a reaction zone to produce a product mixture comprising HF, HCl, CF3CH2CHF2, CF3CH═CHF and CF3CH═CHCl; and recovering the CF3CH2CHF2, CF3CH═CHF and/or CF3CH═CHCl from the product mixture. Also disclosed is a process for making CF3CF2CH3 and/or CF3CF═CH2. In each of the processes the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric. Also disclosed is an azeotropic composition comprising CF3CCl═CH2, and HF. Also disclosed is an azeotropic composition comprising CF3CF2CH3, and HF.
대표청구항▼
1. A process for making CF3CH═CHF, comprising: reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHClCH2X, halopropenes of the formula CX3CCl═CH2, and halopropenes of the formula CX2═CClCH2X, wherein each X is independently selected from the
1. A process for making CF3CH═CHF, comprising: reacting at least one starting material selected from the group consisting of halopropanes of the formula CX3CHClCH2X, halopropenes of the formula CX3CCl═CH2, and halopropenes of the formula CX2═CClCH2X, wherein each X is independently selected from the group consisting of F and Cl, with HF in a reaction zone, optionally in the presence of a fluorination catalyst, to produce a product mixture comprising CF3CH═CHF, wherein the molar ratio of HF to total amount of starting material fed to the reaction zone is at least stoichiometric; andrecovering said at least one product compound from the product mixture. 2. The process of claim 1 wherein CF3CH═CHF is recovered. 3. The process of claim 2 wherein said product mixture further comprises CF3CH2CHF2 which is dehydrofluorinated to produce additional CF3CH═CHF. 4. The process of claim 1 wherein said product mixture further comprises CF3CH═CHCl which is fluorinated to produce at least one of CF3CH2CHF2 and CF3CH═CHF. 5. The process of claim 1 wherein the product mixture further comprises CF3CF═CH2; and wherein CF3CF═CH2 from the product mixture is recovered. 6. The process of claim 1 wherein the product mixture further comprises CF3CF2CH3; and wherein a mixture of CF3CF2CH3 and CF3CH═CHF is recovered and further reacted with HF in the liquid phase under fluorination conditions in the presence of a fluorination catalyst to produce a mixture comprising CF3CH2CHF2 and CF3CF2CH3. 7. The process of claim 1 wherein the product mixture further comprises CF3CF2CH3; and wherein a mixture of CF3CF2CH3 and CF3CH═CHF is recovered and further reacted under dehydrofluorination conditions in the presence of a dehydrofluorination catalyst to produce a mixture comprising CF3CH═CHF and CF3CF═CH2. 8. The process of claim 1 wherein the starting material is reacted in the vapor phase in the presence of a fluorination catalyst. 9. The process of claim 8 wherein the fluorination catalyst comprises at least one chromium-containing component selected from the group consisting of crystalline alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt atoms, and crystalline alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt atoms which has been treated with a fluorinating agent.
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