Dichlorodifluoromethane /difluoroethane

Chlorofluorocarbon-blown foam blocks are used to insulate the walls and roofs of some buildings, thus reducing heat losses and helping to conserve fossil fuels. In this area, polyurethane foam competes with polystyrene foam, which until recently was blown with dichlorodifluoromethane (CFC 12) but is now blown with a mixture of chlorodifluoromethane (HCFC 22) and 1 -chloro-l,l-difluoroethane (HCFC 142b). 

Most of the investigations into disproportionation reactions have mainly concentrated on chlorofiuoro derivatives of methane and ethane. When trichlorofluoromethane is refluxed with aluminum trichloride or aluminum tribromide, dichlorodifluoromethane and carbon tetrachloride are obtained. Dichlorofluoromethane yields chlorodifiuoromethane and chloroform chlorofiuoro derivatives of ethane and longer chain homologs exhibit a tendency towards isomerization as well as disproportionation, i.e. intramolecular halogen atom exchange. In this case, both types of reaction take place simultaneously. In other words, disproportionation of l,l,2-triehloro-1.2,2-trifiuoroethane (1) forms l,l,1.2-tetrachloro-2,2-difluoroethane (2) and... 

The addition of fluorine to tetrachloroethene in dichlorodifluoromethane at —80°C leads to tetrachloro-l,2-difluoroethane in 25% yield. ... 

SYNS DICHLORODIFLUOROMETHANE and DIFLUOROETHANE AZEOTROPIC MIXTURE (DOT) FREON 500 R500 pOT) UCON 500/HALOCARBON 500... 

Fluorocarbon 11. See Trichlorofluoromethane Fluorocarbon 12. See Dichlorodifluoromethane Fluorocarbon 14. See Tetrafluoromethane Fluorocarbon 21. See Dichlorofluoromethane Fluorocarbon 22. See Chlorodifluoromethane Fluorocarbon 112. See 1,1,2,2-Tetrachloro-1,2-difluoroethane... 

Propei . See Lactic acid Propellant 11. See Trichlorofluoromethane Propellant 12. See Dichlorodifluoromethane Propellant 22. See Chlorodifluoromethane Propellant 23. See Trifluoromethane Propellant 114. See 1,2-Dichlorotetrafluoroethane Propellant 142b. See 1,1,1-Chlorodifluoroethane Propellant 152a. See 1,1-Difluoroethane Propellant C-318. See Octafluorocyclobutane Prop-2-enal 2-Propenal. See Acrolein... 

Ammonia Butane Carbon tetrachloride 1,1,1-Chlorodifluoroethane Chlorodifluoromethane Chlorofluoromethane Chlorotetrafluoroethane 2-Chloro-1,1,1,2-tetrafluoroethane sym-Dibromotetrafluoroethane Dichlorodifluoromethane cis-1,2-Dichloroethylene trans-1,2-Dichloroethylene Dichlorofluoroethane Dichlorofluoromethane Dichlorotetrafluoroethane 1,2-Dichlorotetrafluoroethane Dichlorotrifluoroethane 1,1-Difluoroethane Difluoromethane Dimethyl ether Ethane Ethyl bromide Ethyl chloride ... 

DOT Proper Shipping Name Dichlorodifluoromethane and difluoroethane azeotropic... 

TC Shipping Name Dichlorodifluoromethane and difluoroethane azeotropic mixture TC Classification 2.2 (Non-flammable gas)... 

LIGHTER REFILLS, cigarettes, containing (lammable gas 1078 12 DICHLORODIFLUOROMETHANE and DIFLUOROETHANE MIXTURE... 

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