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Tetrachloroethylene, also known as perchloroethylene [a] or under the systematic name tetrachloroethene, and abbreviations such as perc (or PERC), and PCE, is a chlorocarbon with the formula Cl 2 C=CCl 2. It is a non-flammable, stable, colorless and heavy liquid widely used for dry cleaning of fabrics.
Modern dry cleaning machines use a closed-loop system in which the chilled air is reheated and recirculated. This results in high solvent recovery rates and reduced air pollution. In the early days of dry cleaning, large amounts of perchloroethylene were vented to the atmosphere because it was regarded as cheap and believed to be harmless.
Two carcinogenic chemicals used in cleaning products and other common household goods have been banned in the U.S., the Environmental Protection Agency (EPA) announced in a Dec. 9 press release ...
Tetrachloroethylene carbonate is a carbonate ester with the chemical formula C 2 Cl 4 O 2 CO. It is produced by the photochlorination of ethylene carbonate. It has been used as precursor for oxalyl chloride. [3] Tetrachloroethylene carbonate acts as a Lewis base and it forms a complex with the Lewis acid antimony pentachloride. [4]
Dry cleaning refers to any process which uses a chemical solvent other than water. [12] The solvent used is typically tetrachloroethylene (perchloroethylene), which the industry calls "perc". [ 13 ] [ 14 ] It is used to clean delicate fabrics that cannot withstand the rough and tumble of a washing machine and clothes dryer ; it can also obviate ...
log 10 of Tetrachloroethylene vapor pressure. Uses formula: log e P m m H g = {\displaystyle \scriptstyle \log _{e}P_{mmHg}=} log e ( 760 101.325 ) − 6.665868 log e ( T + 273.15 ) − 6530.97 T + 273.15 + 60.47398 + 3.522382 × 10 − 6 ( T + 273.15 ) 2 {\displaystyle \scriptstyle \log _{e}({\frac {760}{101.325}})-6.665868\log _{e ...
Tetrachloroethylene oxide, perchloroethylene oxide (PCEO) or tetrachlorooxirane, is the perchlorinated analogue of ethylene oxide and a proposed metabolite of tetrachloroethylene. [3] It is a halogenated epoxide with the formula C 2 Cl 4 O. Tetrachloroethylene oxide is fairly stable but rearranges to trichloroacetyl chloride at higher ...
[6] [7] Trichloroethylene (TCE) and tetrachloroethylene (PCE) are two examples of such pollutants, and their degradation has been a focus of research. [6] [7] [10] PCE is an alkyl solvent that was previously used in dry cleaning, degreasing machinery and other applications. [6] [7] It remains a common contaminant of groundwater.