[특허]Production of 1,2-dihydro and 2,2-dihydro hexafluoropropanes and azeotropes thereof with HF

[미국특허] Production of 1,2-dihydro and 2,2-dihydro hexafluoropropanes and azeotropes thereof with HF 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C07C-017/08
출원번호	US-0249405 (1994-05-26)
발명자 / 주소	Rao V. N. Mallikarjuna (Wilmington DE) Walczak Francis J. (New Castle DE)
출원인 / 주소	E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보	피인용 횟수 : 11 인용 특허 : 8

초록 ▼

CF3CHFCHF2 production is disclosed which involves reacting CF3CF〓CHF with HF at an elevated temperature over a catalyst selected from the group consisting of aluminum fluoride, fluorided alumina, metals supported on aluminum fluoride, metals supported on fluorided alumina and catalysts comprising trivalent chromium. Also disclosed is enrichment of CF3CF〓CHF from a starting mixture containing CF3CF〓CHF and CF3CH〓CF2 which involves reacting said starting mixture with HF at an elevated temperature over a catalyst consisting essentially carbon, a catalyst consisting essentially of metal halides supported on carbon, a catalyst consisting essentially of Cr2O3, or mixtures thereof (provided that when Cr2O3 is present the temperature is about 250°C. or less) to produce a product mixture containing CF3CH2CF3 and unreacted CF3CF〓CHF wherein the mole ratio of CF3CF〓CHF to CF3CH〓CF2 is greater than the ratio thereof in the starting mixture. Compositions are disclosed which consist essentially of hydrogen fluoride in combination with an efective amount of a compound selected from the group consisting of CF3CHFCHF2 and CF3CH2CF3 to form an azeotrope or azeotrope-like composition with hydrogen fluoride. Included are compositions containing from about 31 to 60 mole percent CF3CHFCHF2 and compositions containing from about 41 to 63 mole percent CF3CH2CF3.

대표청구항

A process for producing CF3CHFCHF2, comprising: reacting CF3CF〓CHF with HF at a temperature of at least about 275°C. over a catalyst selected from the group consisting of aluminum fluoride and fluorided alumina.

이 특허에 인용된 특허 (8) 인용/피인용 타임라인 분석

Rao V. N. M. (Wilmington DE), Catalytic hydrogenolysis.
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Lerou, Jan J., Chromium oxide catalyst composition.
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Manzer Leo E. (Wilmington DE) Rao V. N. Mallikarjuna (Wilmington DE), Gas-phase fluorination process.
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Rao V. N. Mallikarjuna (Wilmington DE) Weigert Frank J. (Wilmington DE) Krespan Carl G. (Wilmington DE), Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyf.
상세보기
Manzer Leo E. (Wilmington DE) Rao V. N. Mallikarjuna (Wilmington DE), Isomerization of saturated fluorohydrocarbons.
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Gumprecht William H. (Wilmington DE) Manzer Leo E. (Wilmington DE) Rao V. N. Mallikarjuna (Wilmington DE), Process for the manufacture of 1,1,1-trifluorodichloroethane and 1,1,1,2-tetrafluorochloroethane.
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von Halasz Sigmar P. (Kelkheim DEX), Process for the manufacture of octafluoropropane.
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Gassen Karl-Rudolf (Odenthal DEX) Bielefeldt Dietmar (Ratingen DEX) Marhold Albrecht (Leverkusen DEX) Schwarz Hans-Helmut (Krefeld DEX), Process for the preparation of 1,1,1,3,3,3-hexafluoropropane and 2-chloro-1,1,1,3,3,3-hexafluoropropane.
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이 특허를 인용한 특허 (11) 인용/피인용 타임라인 분석

Nappa Mario Joseph ; Rao V. N. Mallikarjuna ; Sievert Allen Capron, 1,1,1,2,3,3,3-heptafluoropropane manufacturing process.
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Hulse, Ryan; Pham, Hang T.; Singh, Rajiv R.; Tung, Hsueh S.; Merkel, Daniel C.; Pokrovski, Konstantin A., Azeotrope-like composition of hexafluoropropane, hexafluoropropene and hydrogen fluoride.
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Hulse, Ryan; Pham, Hang T.; Singh, Rajiv Ratna; Tung, Hsueh Sung; Merkel, Daniel C.; Pokrovski, Konstantin A., Azeotrope-like composition of hexafluoropropane, hexafluoropropene and hydrogen fluoride.
상세보기
Rao V. N. Mallikarjuna ; Sievert Allen Capron ; Subramanian Munirpallam A., Compositions comprising CF.sub.3 CF.sub.2 CHF.sub.2 and their manufacture.
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Bragante Letanzio,ITX ; Cuzzato Paolo,ITX, Preparation process of 227.
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Nappa, Mario Joseph; Rao, Velliyur Nott Mallikarjuna; Sievert, Allen Capron; Knapp, Jeffrey P., Process and methods of purification for the manufacture fluorocarbons.
상세보기
Nappa, Mario Joseph; Rao, Velliyur Nott Mallikarjuna; Sievert, Allen Capron; Knapp, Jeffrey P., Process for the manufacture fluorocarbons.
상세보기
Manogue, William H.; Rao, V. N. Mallikarjuna; Sievert, Allen Capron; Swearingen, Steven H., Process for the manufacture of 1,1,1,3,3-pentafluoropropene, 2-chloro-pentafluoropropene and compositions comprising saturated derivatives thereof.
상세보기
V. N. Mallikarjuna Rao ; Allen Capron Sievert, Processes for the manufacture of 1,1,1,3,3-pentafluoropropene, 2-chloro-pentafluoropropene and compositions comprising saturated derivatives thereof.
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Velliyur Nott Mallikarjuna Rao ; Francis John Walczak, Production of 1,2-dihydro and 2,2-dihydro hexafluoropropanes and azeotropes thereof with HF.
상세보기
Velliyur Nott Mallikarjuna Rao ; Francis John Walczak, Production of 1,2-dihydro and 2,2-dihydro hexafluoropropanes and azeotropes thereof with HF.
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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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[미국특허] Production of 1,2-dihydro and 2,2-dihydro hexafluoropropanes and azeotropes thereof with HF 원문보기