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Matches 851 - 900 out of 6,676

Document Document Title
WO/1996/003361A1
The invention concerns a process for preparing 1,2-dichloroethane (EDC) by feeding chlorine and ethylene into circulated EDC which contains a catalyst. A partial stream of the reaction mixture is fed to a flash vaporization system and th...  
WO/1996/003473A1
A composition for use in a heat transfer device such as a refrigeration or air conditioning system is described which comprises: (A) at least one hydrofluorocarbon selected from the group consisting of difluoromethane (R-32) and 1,1,1-tr...  
WO/1996/002481A1
Phase transfer catalysis (PTC) uses a catalyst comprising a synthetic porous inorganic crystalline material which contains a cation of an onium compound, e.g. cetyltrimethylammonium, within the pores of said material. The crystalline mat...  
WO/1996/002483A1
A process for producing 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) by the reaction of hexafluoropropene (HFP) with anhydrous hydrofluoric acid (HF) in the presence of an antimony catalyst, whereby HFC-227ea can be produced in a high yi...  
WO/1996/001797A1
This invention is related to the preparation of hydrofluorocarbons (HFCs). Specifically, it relates to the fluorination of a compound of the formula: CFyCl3-yCH2CHFwCl2-w wherein w = 0 or 1, and y = 0 - 3, with hydrogen fluoride in the p...  
WO/1996/000707A1
A process for producing a fluorinated vic-dichloroalkene derivative and a fluorinated alkane derivative represented by the respective general formulae from an inespensive starting material: R1-CC1=CC1-R2, R1-CR3R4-CR5R6-R2, (wherein R1 a...  
WO/1995/035271A1
A process for producing difluoromethane by fluorinating dichloromethane with hydrogen fluoride in a liquid phase in the presence of a fluorination catalyst under such conditions that the reaction is conducted under an absolute pressure o...  
WO/1995/032935A1
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, me...  
WO/1995/032996A1
This invention relates to carbon based initiators for polymerization and telomerization reactions. Polymers produced are useful as water repellants and materials with high temperature resistance. Telomers are useful as intermediates in t...  
WO/1995/032274A1
A mixed solvent composition containing at least one member selected between 1,1,1,2,3,4,4,5,5,5-decafluoropentane and perfluorohexane and dichloropentafluoropropane as the essential ingredient, or a mixed solvent composition containing a...  
WO/1995/032168A1
A process for the preparation of one or more of CHClFCF3 (HCFC-124), CHF2CClF2 (HCFC-124a) and CHF2CF3 (HFC-125) by reaction of perchloroethylene with hydrogen fluoride in a single stage reaction vessel in the presence of a fluorination ...  
WO/1995/031422A1
The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF2CH=CH2 where R is CxClyFz and y + z = 2x + 1. The invention is also directed to a practical process for conver...  
WO/1995/027688A1
A process for the production of pentafluoroethane which comprises contacting a hydrofluorochloroethane having the formula: C2H1Cl1+xF1+y wherein x and y are each independently 0, 1, 2 or 3 provided that x + y is 3, with hydrogen fluoride...  
WO/1995/027689A1
A process for the purification of pentafluoroethane by removing chloropentafluoroethane therefrom which comprises adding to the impure pentafluoroethane a component which undergoes a non-ideal interaction with chloropentafluoroethane and...  
WO/1995/024451A1
Refrigerant compositions include mixtures of difluoromethane and isobutane, butane, propylene or cyclopropane; pentafluroethane and propylene or cyclopropane; 1,1,2,2-tetrafluoroethane and propane; 1,1,1,2-tetrafluoroethane and cycloprop...  
WO/1995/024370A1
The disclosure relates to separating 1,1,2,2 tetrafluoroethane (HFC-134) and 1,1,1,2 tetrafluoroethane (HFC-134a) from each other and/or from fluorocarbon impurities by using extractive distillation with an extractive agent comprising an...  
WO/1995/022994A1
The invention concerns new gas-containing microparticles, agents containing them, their use in medical diagnosis by ultrasonic techniques and methods of producing said particles and agents.  
WO/1995/021148A1
A process is disclosed for separating pentafluoroethane from a mixture comprising pentafluoroethane, 1,1,1,-trifluoroethane and chloropentafluoroethane by using alcohols such as methanol, ethanol, among others, in an extractive distillat...  
WO/1995/021147A1
A process for separating pentafluoroethane from a mixture comprising pentafluoroethane and chloropentafluoroethane by employing extractive agents comprising a hydrochlorocarbon, hydrocarbon, chlorocarbons, among others.  
WO/1995/019947A1
Hydrofluoroalkanes useful as solvents, especially for vapor degreasing and solvent cleaning, are one or many of the above mentioned formulae.  
WO/1995/018846A1
A mixed gas refrigerant for use as a replacement for CFC refrigerants, and specifically, for R-12, which includes at least three components including R-134a, R-124, and n-butane.  
WO/1995/017364A1
A process for the production of difluoromethane which comprises contacting bis(fluoromethyl)ether in the liquid phase with boron trifluoride under conditions such that the molar ratio of boron trifluoride to bis(fluoromethyl)ether is at ...  
WO/1995/017366A1
A process for purifying 1,1,1,3,3-pentafluoro-2,3-dichloropropane by distilling a mixture containing hydrogen fluoride and 1,1,1,3,3-pentafluoro-2,3-dichloropropane to prepare an azeotropic composition containing 85-95 mole % of hydrogen...  
WO/1995/016657A1
The invention is directed to an improved process for the preparation of spirocyclic lactams which utilizes diiodides in the spiro alkylation of lactams N-substituted with a tertiary amine group. The resultant spirocyclic lactams are usef...  
WO/1995/016655A1
The instant invention relates to producing fluorinated propanes and pentanes. More particularly it relates to producing perhalofluoropropanes and pentanes by reacting dihalodifluoromethanes with polyfluoroethylenes, notably tetrafluoroet...  
WO/1995/016656A1
The instant invention relates to producing perhalofluorobutanes and perhalofluorohexanes, more particularly it relates to their production by utilizing tetrafluoroethylene (hereinafter referred to as "TFE") and chlorotrifluoro-ethylene (...  
WO/1995/016654A1
A process for the production of pentafluoroethane which comprises the steps (i) producing a composition comprising a compound of formula C2HClxFy in which x = 1, 2 or 3 and y = 2, 3 or 4 provided that x + y is 5, contaminated with a comp...  
WO/1995/015937A1
A process for producing difluoromethane and 1,1,1,2-tetrafluoroethane comprising the steps of: (1) reacting methylene chloride and 1,1,2-trichloroethylene with hydrogen fluoride in a first reactor in a gas phase in the presence of a fluo...  
WO/1995/013256A1
1,1,1,3,3-Pentafluoropropane is produced in a high yield at a high selectivity by reducing 3-chloro-1,1,1,3,3-pentafluoropropane with hydrogen in a vapor phase in the presence of a noble metal catalyst.  
WO/1995/013336A1
Compositions of N(CF3)a(CHF2)b(CH2F)c, where a, b and c are integers from 0 to 3 and a+b+c=3, and CnFmH2n+2-m, where n is an integer from 1 to 3 and m is an integer from 1 to 8, are disclosed. Also disclosed are compositions of N(CF3)3 a...  
WO/1995/013335A1
Compositions of 2,2-dichloro-1,1,1-trifluoroethane and 1,1,2,2,3-pentafluoropropane, 1,1,2,3,3-pentafluoropropane or 1,1,1,2,3-pentafluoropropane.  
WO/1995/012566A1
A process is disclosed for producing a product comprising CCl2FCF3 substantially free of CClF2CClF2. The process includes (i) contacting a mixture of perhalogenated hydrocarbons which is essentially free of CClF2CClF2 and comprises from ...  
WO/1995/012565A1
A process for producing a reaction product comprising C2C13F3 substantially free of 1,2-dichlorotetrafluoroethane is disclosed. The process includes contacting a feed mixture consisting essentially of compounds of the formula C2Cl4-xF2+x...  
WO/1995/012564A1
A process for producing CCl2FCF3 substantially free of CC1F2CC1F2 is disclosed. The process includes contacting a feed mixture consisting essentially of C2Cl3F3 where the ratio of CCl2FCClF2 to CCl3CF3 is at least about 1:9 with an isome...  
WO/1995/012563A1
A process for producing difluoromethane is disclosed which includes the step of contacting a gaseous mixture containing CH2Cl2 and hydrogen fluoride with a catalyst containing a catalytically effective amount of trivalent chromium suppor...  
WO/1995/010494A1
The invention relates to a process for producing pentafluoroethane from unsaturated compounds with two carbon atoms substituted by hydrogen and possibly fluorine, especially trifluoroethylene. The process can also be used in a process fo...  
WO/1995/009140A1
The present invention relates to a process for the reduction dechlorination of ClCF2CFClCF2Cl to HCF2CHFCF2H comprising the step of contacting 1,2,3-trichloropentafluoroethane and H2 over a catalyst selected from the group consisting of ...  
WO/1995/008602A1
A refrigerant composition for use in a vapour-compression refrigeration apparatus as a replacement for currently used refrigerants R22 and R12 comprises a mixture of pentafluoroethane (R125), tetrafluoroethane (R134a), a hydrocarbon sele...  
WO/1995/008603A1
Compositions include mixtures of trifluoromethane and pentafluoropropane; fluoromethane and pentafluoropropane; tetrafluoroethane and heptafluoropropane or pentafluoropropane; 1,1-difluoroethane and heptafluoropropane, or pentafluoroprop...  
WO/1995/006693A1
Compositions of 1,1,1,2,3,4,4,5,5,5-decafluoropentane, bis(fluoromethyl) ether, 2,2,4,4-tetrafluorooxetane, 2,2,3,3-tetrafluorooxetane, 1,1,1,2-tetrafluoro-2-(fluoromethoxy)ethane, 1-(difluoromethoxy)-1,2,2-trifluoroethane, 1-(difluorome...  
WO/1995/006625A1
A process for the production of difluoromethane which comprises contacting formaldehyde with hydrogen fluoride in the presence of a catalyst and a chemical dehydrating agent at a temperature below 150 �C. Preferably BF3 is employed as ...  
WO/1995/006021A1
A process is disclosed for separating HF from organics by passing a mixture of HF and organics through a column or bed containing a polymer which sorbs the HF leaving an essentially pure organic stream. The HF may be recovered from the p...  
WO/1995/005429A1
New ternary compositions of trifluoromethane (R23),1,1,1-trifluoroethane (R143a) and chlorodifluoromethane (R22) suitable as refrigerants for the cryogenic temperature range are disclosed. These compositions qualify in particular as suit...  
WO/1995/005353A1
Alternatives to chlorofluorocarbons are provided by the inventive process for synthesizing fluorine-containing products RCFbHc+a-1Hf+d-1FeCR' which may optionally be carried out without the isolation of any intermediate in a single react...  
WO/1995/004020A1
A process for the preparation of perfluoroalkyl iodides, especially perfluoroethyl iodide, by reaction of perfluorinated compounds which contain a carbon carbon double bond with ICl in HF solvent in the presence of Lewis acid catalysts. ...  
WO/1995/004021A1
The invention relates to a process for preparing hydrofluorocarbons of the formulas CF3(CH2CF2)nF comprising reacting at least one reactant selected from CCl3(CH2CCl2)nCl, CCl3(CH2CF2)nCl or CCl2[(CH2CF2)Cl]2, where n=1 to 3, with hydrog...  
WO/1995/004022A1
This invention is related to the preparation of hydrofluorocarbons (HFCs). Specifically, it relates to the manufacture of 1,1,1,3,3-pentafluoropropane, CF3CH2CF2H (HFC-245fa) by the steps comprising (1) the formation of CCl3CH2CCl3 by th...  
WO/1995/003264A1
There is provided a process for the preparation of 1,1,1-trichlorotrifluoroethane in which 1,1-dichloro-2,2,2-trifluoroethane is subjected to chlorination by bringing the 1,1-dichloro-2,2,2-trifluoroethane into contact with chlorine with...  
WO/1995/002652A1
Azeotrope-like compositions comprising trifluoromethane and carbon dioxide or hexafluoroethane and carbon dioxide are stable and have utility as refrigerants for heating and cooling as well as fire extinguishing compositions.  
WO/1994/029251A1
A process for producing 1,1,1,3,3-pentafluoropropane by reducing 1,1,1,3,3,3-pentafluoropropene with hydrogen in the presence of a palladium catalyst in vapor phase at 40 to 300 �C. A process for producing 1,1,1,3,3-pentafluoropropane ...  

Matches 851 - 900 out of 6,676