Fluorine compounds hydrochlorofluorocarbons

CFG = chlorofluorocarbon HCFC = hydrochlorofluorocarbon see Fluorine compounds,organic-aliphatic. 

The term fluorocarbons is defined here as carbon compounds containing fluorine. If they contain only fluorine, they are sometimes referred to as FCs. The compounds may also contain chlorine, bromine, or hydrogen. Other descriptive names include chlorofluorocarbons (CFCs), fluorinated compounds, and halogen-ated hydrocarbons. Hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (FIFOs) are compounds in this family that contains hydrogen. Unless otherwise specified, the term fluorocarbons in this monograph applies to FCs, CFCs, HCFCs, and HFCs. 

Poor solubility in most common organic solvents represents an inherent problem in the synthesis and processing of many high molar mass fluoropolymers. In fact, CFCs and carbon dioxide are the best solvents for amorphous varieties of fluoropolymers. Due to the environmental problems associated with CFCs, the international community is seeking to replace them with more benign compounds such as hydrochlorofluorocarbons and hydrofluorocarbons. However, the environmental problems which will be created by the use of these replacement compounds such as the accumulation of trifluoroacetic acid in the atmosphere clouds this issue [71], Carbon dioxide presents an ideal inert solvent to effect the polymerization of these types of highly fluorinated monomers and obviates the use of solvents that are being phased out because of environmental concerns. 

FLUORINECOMPOUNDS,ORGANIC - FLUORINATED ALIPHATIC COMPOUNDS] (Vol 11) Hydrochlorofluorocarbons (HCFCs)... 

Within the family of halocarbon refrigerants are compounds that contain chlorine, fluorine, and carbon, the chlorofluorocarbons (CFCs). Hydrochlorofluorocarbons (HFCs) contain chlorine, fluorine, carbon and hydrogen. Halocarbons that contain only carbon, fluorine, and hydrogen are called hydrofluorocarbons (HFCs). 

In the early twenty-first century, more than 90 percent of the chloroform produced in the United States is used in the preparation of hydrochlorofluorocarbons (HCFCs). HCFCs are compounds consisting of carbon, hydrogen, chlorine, and fluorine. They were developed in the 1980s to replace the chlorofluorocarbons (CFCs) that, at the time, were widely used for a number of industrial applications. Replacing CFCs had become necessary because they were also destroying the... 

The presence of ethers in the atmosphere is almost entirely the result of direct emissions from anthropogenic sources (e.g., Arif et al., 1997 Intergovernmental Panel on Climate Change, 2001 Johnson and Andino, 2001 http //en.wikipedia.org/wiki/Ethers and references therein). These sources can be quite varied and species dependent for example, many ethers are commonly used as industrial solvents many are formed as combustion intermediates and in the burning of biomass various branched ethers (e.g., methyl tert-butyl ether) are (or have been) used as fuel additives to increase octane number and reduce CO emissions dimethyl ether has being proposed as an alternative diesel fuel many fluorinated species have been manufactured, evaluated and used as possible chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) replacement compounds some halogenated species are used as inhalation anaesthetics or as chlorofluorocarbon replacements and polybrominated diphenyl ethers (PBDEs) are used as flame retardants. There are no major routes to ether formation in the atmosphere itself. 

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