IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0282940
(1994-07-29)
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발명자
/ 주소 |
- Nappa Mario J. (Newark DE) Sievert Allen C. (Elkton MD)
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| 출원인 / 주소 |
- E. I. Du Pont de Nemours and Company (Wilmington DE 02)
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| 인용정보 |
피인용 횟수 :
25 인용 특허 :
0 |
초록
▼
A process is disclosed for producing 1,1,1,3,3,3-hexafluoropropane with high selectivity. 1,1,1,3,3,3-hexachloropropane is contacted with hydrogen fluoride in the vapor phase at a temperature of from about 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium, to produce a flu
A process is disclosed for producing 1,1,1,3,3,3-hexafluoropropane with high selectivity. 1,1,1,3,3,3-hexachloropropane is contacted with hydrogen fluoride in the vapor phase at a temperature of from about 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium, to produce a fluorinated product containing CF3CH2CF3 and its haloprecursors (i.e., compounds which may be recycled for further reaction with HF) with a total selectivity of at least about 95 percent; and a sufficient amount of said haloprecursors is reacted with hydrogen fluoride in the vapor phase at a temperature of from 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium to provide an overall selectivity to 1,1,1,3,3,3-hexafluoropropane of at least about 95 percent based upon the amount of 1,1,1,3,3,3-hexachloropropane initially reacted with HF.
대표청구항
▼
A process for producing 1,1,1,3,3,3-hexafluoropropane, comprising: (1) contacting 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride in the vapor phase at a temperature of from about 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium, to produce a fluorinated product cont
A process for producing 1,1,1,3,3,3-hexafluoropropane, comprising: (1) contacting 1,1,1,3,3,3-hexachloropropane with hydrogen fluoride in the vapor phase at a temperature of from about 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium, to produce a fluorinated product containing CF3CH2CF3 and its haloprecursors with a total selectivity of at least about 95 percent; and (2) reacting a sufficient amount of said haloprecursor with hydrogen fluoride in the vapor phase at a temperature of from about 200°C. to 400°C. in the presence of a catalyst comprising trivalent chromium, to provide an overall selectivity to 1,1,1,3,3,3-hexafluoropropane of at least about 95 percent based upon the amount of 1,1,1,3,3,3-hexachloropropane reacted with HF in (1).
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