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Matches 901 - 950 out of 6,281

Document Document Title
WO/1993/022476A1
Azeotrope-like compositions comprising 1,1,2,3,3-pentafluoropropane and methanol or ethanol and optionally nitromethane are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications inc...  
WO/1993/021140A1
Hydrogen fluoride can be efficiently removed from a mixture thereof with dichloromethane, chlorofluoromethane and/or difluoromethane either by distilling the mixture to remove a binary azeotropic mixture composed of hydrogen fluoride and...  
WO/1993/020177A1
Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4-octofluorobutane; trans-1,2-dichloroethylene, cis-1,2-dichloro-ethylene, 1,1-dichloroethane, or 1,3-dichloro-1,2,2,3,3-HCFC-225cb; and an alcohol such as m...  
WO/1993/019845A1
A catalyst for promoting halogen exchange in feedstocks such as 1,1,1-trichloroethane to yield chlorofluorohydrocarbons or chlorofluorocarbons is made by halogenating iron oxide Fe¿3?O¿4? or other non-stoichiometric oxide with SF¿4? t...  
WO/1993/020178A1
Azeotropic or azeotrope-like compositions of effective amounts of 1,1,2,2,3,3,4,4-octofluorobutane and trans-1,2-dichloroethylene; cis-1,2-dichloroethylene; or 1,1-dichloroethane to form an azeotropic or azeotrope-like composition are di...  
WO/1993/019027A1
A process for producing gem-difluoroalkanes more economically than the conventional processes, which process comprises the steps of: (A) mixing crude C3 or C4 alkynes contaminated with polymerizable olefins with fluorinated alkanes boili...  
WO/1993/017988A1
A process is disclosed for purifying a hexafluoroethane product containing CC1F3 and/or CHF3 impurities which comprises the step of contacting the product with a sorbent for said impurities selected from activated carbons and inorganic (...  
WO/1993/016798A1
A chromium-free fluorination catalyst comprising an activity-promoting amount of zinc supported on an alumina, halogenated alumina or aluminium oxyhalide support and use of the catalyst for the production of fluorinated hydrocarbons by r...  
WO/1993/016973A1
A novel compound, 3,3-dichloro-1,1,1,2,2,4,4,5,5,5-decafluoropentane, as a precursor of a substitute for refrigerants and the like; an economical process for continuously producing the compound in high yield and selectivity by reacting t...  
WO/1993/016974A1
Described is a method for the purification of perfluorocarbons, or mixtures of perfluorocarbons, having impurities containing hydrogen and/or carbon-carbon double bonds. The impure perfluorocarbons or perfluorocarbon mixtures are reacted...  
WO/1993/016023A1
A novel compound, 1,1,1,2,2,5,5,5-octafluoropentane, which is promising as a substitute for CFC, HCFC and the like now in use as refrigerant, blowing agent, detergent or solvent; and a process for producing the same economically and indu...  
WO/1993/015162A1
Compositions comprising difluoromethane, 1,1,1,2-tetrafluoroethane and a member selected from the group consisting of 1,1-difluoroethane, 1,1,1-trifluoroethane, propane and dimethyl ether having a vapor pressure from about 12.2 psia to a...  
WO/1993/014052A1
A process for preparing a hydrochlorofluorocarbon essentially free of olefinic impurities by selectively hydrogenating the olefinic impurities. The process may be controlled such that at least a portion of the hydrochlorofluorocarbon is ...  
WO/1993/014175A1
A refrigerant composition comprising a mixture of difluoromethyl trifluoromethyl ether and at least one other fluorine containing compound selected from 1,1,1,2-tetrafluoroethane, fluoromethyl trifluoromethyl ether and bis(difluoromethyl...  
WO/1993/014051A1
A process for industrially producing at least one halogen compound selected from the group consisting of 1,1,1,4,4,4-hexafluoro-2,3-dichlorobutane, 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene, 1,1,1,2,4,4,4-hepta-fluoro-2-butene and 1,1,1,2...  
WO/1993/014174A1
A refrigerant composition comprising a mixture of difluoromethyl trifluoromethyl ether and at least one hydrofluoroalkane selected from difluoromethane, pentafluoroethane and 1,1,1-trifluoroethane is claimed.  
WO/1993/014173A1
A refrigerant composition comprising a mixture of 1,1,1,2-tetrafluoroethane and at least one fluorinated ether selected from trifluoromethyl methyl ether and fluoromethyl trifluoromethyl ether is claimed.  
WO/1993/013041A1
A method of removing chloroform contained in 1,1,1,2,2-pentafluoro-3,3-dichloropropane (R-225ca), 1,1,2,2,3-pentafluoro-1,3-di-chloropropane (R-225cb), or a mixture thereof by the reaction of the chloroform with chlorotrifluoroethylene a...  
WO/1993/012059A1
A method of obtaining alpha-substituted omega-hydroperfluoroalkanes of general formula: H(CF2CF2)nH where R = H, COOH, n = 1-10, consists in oxidation of alpha, alpha, omega-trihydroperfluoroalcohols by gaseous oxygen or an oxygen-contai...  
WO/1993/012057A1
A process for the production of a hydro(halo)fluorocarbon which comprises heating an alpha-fluoroether in the vapour phase at elevated temperature. alpha-fluoroethers are obtained by reacting a non-enolisable aldehyde with hydrogen fluor...  
WO/1993/012058A1
2-Chloro-1,1-difluoroethylene (R-1122) is removed from 1,1,1,2-tetrafluoroethane (R-134a) by contacting the R-134a in the vapor phase with chlorine in the presence of ultraviolet light providing an exposure of at least about 2 watts-hour...  
WO/1993/011853A1
Water present in a hot gaseous product stream from a reactor system (A, B) (Figure 1) containing hydrogen fluoride is separated from the stream in order to eliminate a potentially corrosive combination of water and HF. The water is remov...  
WO/1993/011201A1
Azeotropes of hydrofluorocarbons and hydrofluoroethers useful for use as refrigerants are disclosed. Zeotropes of hydrofluoropropanes and hydrofluoroethers with hydrofluorocarbons, hydrofluoroethers, and hydrocarbons useful as refrigeran...  
WO/1993/011098A1
New compounds are described typically having the formula CH3C(CH2R)3 or ZCH2C(CH2R)3 where R is a fluorohydrocarbon or perfluorocarbon group preferably containing 4-16 carbon atoms and more F atoms than H atoms. Z is a hydrophilic group ...  
WO/1993/011093A1
A process for producing 1,1,1-trifluoro-2-chloroethane (R-133a) and/or 1,1,1,2-tetrafluoroethane (R-134a) which comprises distilling in a distilling column a part or the whole of a mixture mainly comprising R-133a, R-134a, hydrogen fluor...  
WO/1993/010067A1
1,1,1,4,4,4-Hexafluorobutane is produced in a high yield at high selectivity by reducing 2-chloro-1,1,1,4,4,4-hexafluoro-2-butene with hydrogen in the presence of a hydrogenation catalyst containing an alloy composed of a first metallic ...  
WO/1993/010070A1
A process for the production of bis(fluoromethyl)ether by contacting formaldehyde with hydrogen fluoride in a reaction/distillation vessel. The reaction/distillation vessel is preferably a reaction/distillation column through which forma...  
WO/1993/009080A1
A process for producing 1,1-dichloro-2,2,2-trifluoroethane in a high yield by reducing 1,1,1-trichloro-2,2,2-trifluoroethane with hydrogen in the presence of a hydrogenation catalyst prepared by adding at least one metal selected from th...  
WO/1993/009081A1
A process for producing 1,1,1,2,2,4,4,4-octafluorobutane in a high yield by reducing 3,3-dichloro- or 3,3-dibromo-1,1,1,2,2,4,4,4-octafluorobutane.  
WO/1993/009199A1
Compositions of difluoromethane, 1,1,1,2-tetrafluoroethane, and 1,1,2,2-tetrafluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polymers...  
WO1993005002A3  
WO/1993/008240A1
Azeotropic mixtures of HFC-338pcc and an alcohol such as methanol, ethanol, isopropanol or N-propanol, or a ketone such as acetone, are disclosed that are useful as cleaning agents, refrigerants, aerosol propellants, heat transfer media,...  
WO/1993/008147A1
A process for separating and recovering an organic phase (e.g., fluorocarbons such as chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons and perfluorocarbons) from a feed stream of a mixture of fluorocarbons and hydrogen f...  
WO/1993/007308A1
Azeotropic mixtures of 1,1,1,2,3,4,4,5,5,5-decafluoropentane (HFC-43-10mee) and trans-1,2-dichloroethylene, cis-1,2-dichloroethylene or 1,1-dichloroethane are useful as cleaning agents, expansion agents for polyolefins and polyurethanes,...  
WO1993001152A3  
WO/1993/007231A1
Certain compositions of pentafluoroethane and chlorodifluoromethane have unusual efficiency and capacity as fluids for heating and cooling. Such compositions may include additives such as lubricants and solubility enhancers for lubricant...  
WO/1993/007232A1
Substantially constant boiling mixtures of difluoromethane and 1,1,1-trifluoroethane or perfluoroethane are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, and expansion a...  
WO/1993/006070A1
The present invention provides a class of hydrochlorofluorocarbons having a tertiary structure, 5 carbon atoms, 1 chlorine atom, 6 to 8 fluorine atoms, and OH rate constants from about 8 to about 15 cm3/molecule/secx10-14. The hydrochlor...  
WO/1993/006187A1
A refrigerant comprising 1,1,1,4,4,4-hexafluorobutane and a refrigerator using 1,1,1,4,4,4-hexafluorobutane as the refrigerant.  
WO/1993/006188A1
A mixture of difluoromethane with octafluoropropane, and a refrigerator using a refrigerant comprising said mixture.  
WO/1993/005002A2
A catalytic process is disclosed for producing fluorine-substituted hydrocarbon products of the formulae RCH2CF2R and RFC=CHR at an elevated temperature, from compounds of the formula RCHFCHFR, where each R is independently selected from...  
WO/1993/004025A1
The present invention provides hydrochlorofluorocarbons having 3 to 5 carbon atoms, 1 to 2 chlorine atoms, and an OH rate constant from about 8 to about 25 cm3/molecule/sec x 10-14. The hydrochlorofluorocarbons are useful as solvents and...  
WO/1993/004024A1
A catalytic process is disclosed for producing CCl3CF3 from CHCl2CF3, CH2ClCF3 and/or CH3CF3 by chlorination at elevated temperature. Suitable catalysts for the process include carbon catalysts and catalysts wherein halides of certain me...  
WO/1993/002029A1
Catalytic hydrogenolysis of fluorohalocarbons (e.g., CFCs) and fluorohalohydrocarbons (e.g., HCFCs), using catalysts of Re, Co, Ni, Ru, Rh, Pd, Os, Ir, and/or Pt on a carbon having low ash content. Preferred catalysts use carbon which is...  
WO/1993/001152A2
Constant boiling azeotropic or azeotrope-like composition of pentafluoroethane and propane or isobutane are disclosed that are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agen...  
WO1992019706A3  
WO/1992/020640A1
Separating pentafluoroethane from a mixture of pentafluoroethane and chloropentafluoroethane by adding a fluorocarbon extractive agent having 1-4 carbon atoms, and optionally containing hydrogen and/or chlorine, in an extractive distilla...  
WO/1992/019576A1
An improved process for the manufacture of CF�3?CHF�2? by contacting 1,2-dichloro-1,1,2-trifluoroethane (CClF�2?CHClF) or 1-chloro-1,1,2,2-tetrafluoroethane (CHF�2?CClF�2?) or mixtures of CF�3?CHCl�2? and CClF�2?CHClF or ...  
WO/1992/019706A2
The compound, 1,1,1,2,2,3,3,4,4,5,6-undecafluorohexane, and mixtures thereof with alcohols, ethers, esters, ketones, nitromethane, and halogenated hydrocarbons are disclosed; as is the use thereof for cleaning a solid surface by treating...  
WO/1992/018446A1
Mixtures of halocarbons which contain fluorine and chlorine and/or bromine (e.g. a mixture of CCl2FCF3 with CClF2CF3, CCl2F2, CClF2CClF2 or CHClF2) are contacted with hydrogen in the presence of silicon carbide and/or a metal selected fr...  

Matches 901 - 950 out of 6,281