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US 6,255,273 B1Granted
Hydrofluoropolyether-based azeotropic or near azeotropic compositions
AssigneeAusimont S.p.A.
InventorsEzio Musso, Giampiero Basile, Sauro Girolomoni
Life of this patent
Estimating the term…
Abstract
Azeotropic or near azeotropic compositions based on difluoromethoxy-bis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether.
Claims20
Azeotropic or near azeotropic compositions, based on difluoromethoxybis(difluoromethyl ether) and/or 1-difluoromethoxy-1,1,2,2-tetrafluoroethyl difluoromethyl ether, selected from the group consisting of:
- composition % by weight I) difluoromethoxy 2-60 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-40 (CHCl2CF3,HCFC 123 II) difluoromethoxy 1-95 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- n-pentane 99-5 III) difluoromethoxy 1-95 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- iso-pentane 99-1 IV) difluoromethoxy 1-60 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- dimethyl ketone (acetone) 99-40 V) difluoromethoxy 1-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 99-1 (CF3CH2CF2CH3, HFC 365 mfc) VI) difluoromethoxy 1-40 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 99-60 (CF3CH2CH2CF3, HFC 356 ffa) VII) difluoromethoxy 1-96 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- methoxymethyl methylether 99-14 VIII) difluoromethoxy 30-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- n-hexane 70-1 IX) difluoromethoxy 1-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- trans 1,2-dichloroethylene 99-1 (ClCHCHCl, tDCE) X) 1-difluoromethoxy 1-93 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- n-pentane 99-7 XI) 1-difluoromethoxy 30-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- dimethyl ketone (acetone) 70-1 XII) 1-difluoromethoxy 50-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- methyl alcohol 50-1 XIII) 1-difluoromethoxy 15-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- n-hexane 85-1 XIV) 1-difluoromethoxy 1-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- trans 1,2-dichloroethylene 99-1 (ClCHCHCl) XV) 1-difluoromethoxy 5-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- ethyl alcohol 95-1 XVI) difluoromethoxy- 1-42 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-24 (CHCl2CF3, HCFC 123) hydrocarbon 1-35 XVII) difluoromethoxy- 1-64 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 98-1 (CF3CH2CF2CH3, HFC 365 mfc) hydrocarbon 1-35 XVIII) difluoromethoxy- 1-22 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 98-43 (Cf3CH2CH2CF3, HFC 356 ffa) hydrocarbon 1-35 XIX) difluoromethoxy- 1-55 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-35 (CHCl2CF3, HCFC 123) alcohol 1-10 XX) difluoromethoxy- 1-89 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 98-1 (CF3CH2CF2CH3, HFC 365 mfc) alcohol 1-10;
- and XXI) difluoromethoxy- 1-35 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 98-55 (Cf3CH2CH2CF3, HFC 356 ffa) alcohol 1-10.
20 more elements
A method for removing contaminants from surfaces wherein said surfaces are contacted with substitutes for CFC 113, comprising azeotropic and near azeotropic compositions selected from the group consisting of:
- composition % by weight I) difluoromethoxy 2-60 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-40 (CHCl2CF3, HCFC 123) II) difluoromethoxy 1-95 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- n-pentane 95-5 III) difluoromethoxy 1-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- iso-pentane 99-1 IV) difluoromethoxy 1-60 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- dimethyl ketone (acetone) 99-40 V) difluoromethoxy 1-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 99-1 (CF3CH2CF2CH3, HFC 365 mfc) VI) difluoromethoxy 1-40 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 99-60 (CF3CH2CF2CF3, HFC 356 ffa) VII) difluoromethoxy 1-96 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- methoxymethyl methylether 99-14 VIII) difluoromethoxy 30-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- n-hexane 70-1 IX) difluoromethoxy 1-99 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- trans 1,2-dichloroethylene 99-1 (ClCHCHCl, tDCE) X) 1-difluoromethoxy 1-93 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- n-pentane 99-7 XI) 1-difluoromethoxy 30-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- dimethyl ketone (acetone) 70-1 XII) 1-difluoromethoxy 50-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- methyl alcohol 50-1 XIII) 1-difluoromethoxy 15-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- n-hexane 85-1 XIV) 1-difluoromethoxy 1-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- trans 1,2-dichloroethylene 99-1 (ClCHCHCl) XV) 1-difluoromethoxy 5-99 1,1,2,2-tetrafluoroethyl difluoromethyl ether (HCF2OCF2CF2OCF2H);
- ethyl alcohol 95-1 XVI) difluoromethoxy- 1-42 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-1 (CHCl2CF3, HFC 123) hydrocarbon 1-35 XVII) difluoromethoxy- 1-64 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 98-1 (CF3CH2CF2CH3, HFC 365 mfc) hydrocarbon 1-35 XVIII) difluoromethoxy- 1-22 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 98-43 (CF3CH2CH2CF3, HFC 356 ffa) hydrocarbon 1-35 XIX) difluoromethoxy- 1-55 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1-dichloro-2,2,2-trifluoroethane 98-35 (CHCl2CF3, HFC 123) alcohol 1-10 XX) difluoromethoxy- 1-89 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,3,3-pentafluorobutane 98-1 (CF3CH2CF2CH3, HFC 365 mfc) alcohol 1-10;
- and XXI) difluoromethoxy- 1-35 bis(difluoromethyl ether) (HCF2OCF2OCF2H);
- 1,1,1,4,4,4-hexafluorobutane 98-55 (CF3CH2CH2CF3, HFC 356 ffa) alcohol 1-10.
20 more elements
Dependencies are inferred from the claim text.