Methods and materials are disclosed for the recovery of valuable hydrofluorocarbons and subsequent conversion to environmentally inert compounds. More specifically methods and materials are provided for recovering hydrofluorocarbons such as HFC-227, HFC-236, HFC-245, HFC-125, HFC-134, HFC-143, HFC-1
Methods and materials are disclosed for the recovery of valuable hydrofluorocarbons and subsequent conversion to environmentally inert compounds. More specifically methods and materials are provided for recovering hydrofluorocarbons such as HFC-227, HFC-236, HFC-245, HFC-125, HFC-134, HFC-143, HFC-152, HFC-32, HFC-23 and their respective isomers. Processes are provided for converting hydrofluorocarbons such as these to fluoromonomer precursors such as CFC-217, CFC-216, CFC-215, CFC-115, CFC-114, CFC-113, CFC-112, HCFC-22, CFC-12, CFC-13 and their respective isomers. Materials, methods and schemes are provided for the conversion of these fluoromonomer precursors to fluoromonomers such as HFP, PFP, TFP, TFE, and VDF.
대표청구항▼
What is claimed is: 1. A production process comprising: exposing a saturated hydrofluorinated compound to a solid substrate in the presence of a halogenating agent to replace one or more hydrogen atoms of the saturated hydrofluorinated compound with X and form a saturated heterohalogenated intermed
What is claimed is: 1. A production process comprising: exposing a saturated hydrofluorinated compound to a solid substrate in the presence of a halogenating agent to replace one or more hydrogen atoms of the saturated hydrofluorinated compound with X and form a saturated heterohalogenated intermediate consisting of C, F, and X, wherein X is a halogen other than fluorine; and converting the intermediate to a fluoromonomer. 2. The process of claim 1 wherein the replacing occurs between about 150째 C. and about 400째 C. 3. The process of claim 1 wherein the replacing occurs between about 275째 C. and about 350째 C. 4. The process of claim 1 wherein the replacing occurs at less than about 24 kg/cm2. 5. The process of claim 1 wherein the replacing occurs at from about 6.66 kg/cm2 to about 8.06 kg/cm2. 6. The process of claim 1 wherein, during the replacing, the mole ratio of halogenating agent to the saturated hydrofluorinated compound is from about 0.16 to about 22. 7. The process of claim 1 wherein, during the replacing, the mole ratio of halogenating agent to the saturated hydrofluorinated compound is from about 1 to about 4. 8. The process of claim 1 wherein the saturated hydrofluorinated compound comprises C3F7H, C3F6H2, C3F5H3, C2F5H, C2F4H2, C2F3H3, C2F2H4, CF2H2 or CF3H. 9. The process of claim 1 wherein the saturated heterohalogenated intermediate comprises C3CIF7, C3Cl2F6, C3Cl3F5, C2CIF5, C2Cl2F4, C2Cl3F3, C2Cl4F2, CCl2F2, CClHF2 or CCIF3. 10. The process of claim 1 wherein the halogenating agent comprises one or more of bromine, chlorine and iodine. 11. The process of claim 1 wherein the solid substrate comprises activated carbon, Fe, Cu, Al, clay or metal oxides. 12. The process of claim 1 further comprising reacting the fluoromonomer to form a polymer of the fluoromonomer. 13. The process of claim 1 wherein the converting the saturated heterohalogenated intermediate to a fluoromonomer comprises eliminating one or more of a Cl, Br, or I from the intermediate. 14. The process of claim 1 wherein the converting the saturated heterhalogenated intermediate to a fluoromonomer comprises: preparing a fluoroadduct of the intermediate; and eliminating one or more of a Cl, Br, or I from the intermediate. 15. The process of claim 1 wherein the fluoromonomer comprises hexafluoropropene, pentafluoropropene, tetrafluoroethene, difluoroethene or trifluoropropene. 16. The process of claim 1 wherein the solid substrate is a solid catalytic substrate.
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이 특허에 인용된 특허 (7)
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.
Freudenreich Reinhold (Burgkirchen DEX) Mielke Ingolf (Burgkirchen DEX) Rettenbeck Karl (Burgkirchen DEX) Schttle Thomas (Burgkirchen DEX), Process for the preparation of hexafluoropropene.
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