摘要:
Disclosed herein are refrigerant and heat transfer fluid compositions comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one hydrofluorocarbon for use in refrigeration and air conditioning systems employing a centrifugal compressor. The compositions may be azeotropic or near-azeotropic.
摘要:
This invention relates to a process for the production of vinyl fluoride by dehydrofluorination of 1,1-difluoroethane in the presence of a catalyst containing magnesium and/or zinc.
摘要:
A process is disclosed for producing the hydrofluorocarbon CF.sub.3 CH.dbd.CF.sub.2. The process involves dehydrofluorinating CF.sub.3 CH.sub.2 CF.sub.3 at an elevated temperature in the vapor phase over a catalyst of (1) aluminum fluoride, (2) fluorided alumina, (3) metal supported on a trivalent aluminum compound containing fluoride anion, (4) lanthanum fluoride, (5) fluorided lanthanum oxide, (6) metal supported on a trivalent lanthanum compound containing fluoride anion, (7) trivalent chromium compounds and/or (8) catalysts of (a) at least one compound selected from the oxides, fluorides and oxyfluorides of magnesium, zinc and mixtures of magnesium and zinc, and optionally (b) at least one compound selected from the oxides, fluorides and oxyfluorides of aluminum, provided that the atomic ratio of aluminum to the total of magnesium and zinc in said catalyst is about 1:4, or less, to produce a product containing CF.sub.3 CH.dbd.CF.sub.2 and HF. The CF.sub.3 CH.dbd.CF.sub.2 may then be reacted in the vapor phase with hydrogen over a hydrogenation catalyst in the presence of HF to produce CF.sub.3 CH.sub.2 CHF.sub.2.
摘要:
A process is disclosed for producing the hydrofluorocarbon CF.sub.3 CH.sub.2 CHF.sub.2. The process involves dehydrofluorinating CF.sub.3 CH.sub.2 CF.sub.3 at an elevated temperature in the vapor phase over a catalyst of (1) aluminum fluoride, (2) fluorided alumina, (3) metal supported on a trivalent aluminum compound containing fluoride anion, (4) lanthanum fluoride, (5) fluorided lanthanum oxide, (6) metal supported on a trivalent lanthanum compound containing fluoride anion, (7) trivalent chromium compounds and/or (8) catalysts of (a) at least one compound selected from the oxides, fluorides and oxyfluorides of magnesium, zinc and mixtures of magnesium and zinc, and optionally (b) at least one compound selected from the oxides, fluorides and oxyfluorides of aluminum, provided that the atomic ratio of aluminum to the total of magnesium and zinc in said catalyst is about 1:4, or less, to produce a product containing CF.sub.3 CH.dbd.CF.sub.2 and HF; and reacting the CF.sub.3 CH.dbd.CF.sub.2 in the vapor phase with hydrogen over a hydrogenation catalyst in the presence of HF to produce CF.sub.3 CH.sub.2 CHF.sub.2.
摘要:
A dehydrochlorination process is disclosed. The process involves contacting RfCHClCH2Cl with a chromium oxyfluoride catalyst in a reaction zone to produce a product mixture comprising RfCCl═CH2, wherein Rf is a perfluorinated alkyl group.
摘要:
A vapor phase process is disclosed for making internal fluorobutenes. The process involves contacting a halobutane starting material selected from the group consisting of CF2HCHClCH2CCl2H, CF2HCHClCH2CCl3, CF3CHClCH2CCl2H, CF3CHClCH2CCl3, CF3CHClCHClCCl2H, CF3CHClCHClCCl3, CF3CCl2CH2CCl2H, CF3CCl2CH2CCl3, CF3CCl2CHClCCl2H, CF3CCl2CHClCCl3, CF3CClFCHClCCl2H, CF3CClFCHClCCl3, CF3CClFCH2CCl2H, CF3CClFCH2CCl3, CF3CClFCHFCCl2H, CF3CClFCHFCCl3, CF3CClHCHFCCl2H and CF3CClHCHFCCl3, with HF in a reaction zone in the presence of a chromium oxyfluoride catalyst to produce a product mixture comprising an internal fluorobutene. Another vapor phase process is disclosed for making internal fluoropentenes. The process involves contacting a halopentane starting material selected from the group consisting of CF2HCHXCH2CX2CX3, CF3CHXCH2CX2CX3, CF3CHXCHXCX2CX3, CF3CX2CH2CX2CX3, CF3CX2CHXCX2CX3 and CF3CHXCHFCX2CX3, with HF in a reaction zone in the presence of a chromium oxyfluoride catalyst to produce a product mixture comprising an internal fluoropentene, wherein each X is independently selected from the group consisting of F, Cl and Br, provided that not all X are fluorines.
摘要:
The present disclosure relates to compositions comprising 2,3,3,3-tetrafluoropropene that may be useful as heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, extinguishing agents, and fire suppression agents in liquid or gaseous form. Additionally, the present disclosure relates to compositions comprising 1,1,2,3-tetrachloropropene, 2-chloro-3,3,3-trifluoropropene, or 2-chloro-1,1,1,2-tetrafluoropropane, which may be useful in processes to produce 2,3,3,3-tetrafluoropropene.
摘要:
A dehydrochlorination process is disclosed. The process involves contacting RfCFClCH2X with a catalyst in a reaction zone to produce a product mixture comprising RfCF═CHX, wherein said catalyst comprises MY supported on carbon, and wherein Rf is a perfluorinated alkyl group, X ═H, F, Cl, Br or I, M=K, Na or Cs, and Y═F, Cl or Br.
摘要:
A dehydrochlorination process is disclosed. The process involves contacting RfCHClCH2Cl with a catalyst in a reaction zone to produce a product mixture comprising RfCCl═CH2, wherein said catalyst comprises MY supported on carbon, and wherein Rf is a perfluorinated alkyl group, M=K, Na or Cs, and Y=F, Cl or Br.
摘要:
Disclosed is a process for producing a hydrofluoroalkene, RfCF═CH2 comprising contacting a hydrofluoroalkanol of structure RfCF2CH2OH, with a lewis acid to produce a mixture, diluting said mixture with a solvent to produce a solvent mixture, contacting the solvent mixture with a reactive metal, heating the solvent mixture and reactive metal for a sufficient amount of time to produce a hydrofluoroalkene, and condensing and collecting the volatile products comprising the hydrofluoroalkene, wherein Rf is F, or a fluorine-substituted alkyl group.