Freon

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Freon

The Columbia Encyclopedia, Sixth Edition | 2008 | The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information) Copyright

Freon [trade name], any one of a special class of chemical compounds that are used as refrigerants, aerosol propellants, and solvents. These compounds are haloalkanes, i.e., halogen derivatives of saturated hydrocarbons (see alkane ). Every Freon contains at least some fluorine in its molecule, and most contain chlorine or bromine as well. Freons are generally colorless, odorless, nontoxic, noncorrosive, nonflammable, and chemically unreactive. The most commonly used is Freon-12, or dichlorodifluoromethane (CCl 2 F 2 ), which boils at -29.8°C and is thus a gas at ordinary temperatures and pressures. It is prepared by the reaction of carbon tetrachloride with hydrogen fluoride in the presence of a catalyst. There are a number of other Freons. Some of those containing bromine in their molecules are used in fire extinguishers. See also chlorofluorocarbons .

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Freon

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

Fre·on / ˈfrēˌän/ (also fre·on) • n. trademark an aerosol propellant, refrigerant, or organic solvent consisting of one or more of a group of chlorofluorocarbons and related compounds.

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Free newspaper and magazine articles

Free Article Great Development of Freon Substitutes.
Magazine article from: China Chemical Reporter; 10/26/1998
Free Article Russian sub survivors: Freon killed as crew slept
News Wire article from: AP Worldstream; 11/11/2008
Free Article FAQs about R-410a: the move is on to replace R-22 systems with new, Freon-free R-410a.
Magazine article from: Units; 1/1/2008

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Related articles from newspapers, magazines, and more

Illegal Freon enters U.S.
Newspaper article from: Chicago Sun-Times; 8/17/1997; ; 700+ words ; ...now comes a new and growing criminal enterprise: Freon smuggling. Freon - the trade name for a chemical called R-12 - is...noticed that it nearly cost your shirt. That's because Freon is an ozone-depleting chlorofluorocarbon that's...
FIGHT BACK : FREON BAN LEAVING MANY AUTO OWNERS OUT IN THE COLD.(L.A. LIFE)
Newspaper article from: Daily News (Los Angeles, CA); 2/15/1997; 700+ words ; ...chloroflourocarbon refrigerant, better known as freon. It's the gas that makes refrigerators...until 1994. Ten thousand tons of illegal freon enter this country every year in 12-ounce...million worth. Next to illegal drugs, freon is the most commonly smuggled contraband...
PAYING THE PRICE FOR FREON.(NEWS)
Newspaper article from: The Cincinnati Post (Cincinnati, OH); 7/18/1996; ; 700+ words ; ...s merely the cost of saving the world. Freon, a popular trade name for air conditioning...consumers. Eventually, production of Freon will be banned because many scientists...surprised when it cost him $150 to replace Freon in his home air conditioner. ''I got...
Timing key for replacing Freon-based ice plants
Newspaper article from: The Brandon Sun; 4/7/2009; ; 700+ words ; ...feel pressured to get rid of operational Freon-based ice plants, according to a Winnipeg...Manitoba's community arenas still use Freon-style compressors to make ice surfaces...It's always been a tug of war between Freon plants and ammonia plants," Vien said...
GOVERNMENT WAGES WAR ON ILLICIT FREON.(NEWS)
Newspaper article from: Daily News (Los Angeles, CA); 11/10/1996; 700+ words ; ...old staple on car-repair shop shelves, Freon. And it is taking on a sinister new role...federal officials are waging a ``war on Freon'' with some of the same seriousness as...crack down on the thousands of tons of Freon that enter the country illegally each year...
Environmentalists Upset With EPA Request for More Freon
Transcript from: NPR All Things Considered; 12/27/1993; 700+ words ; ...00-00-0000 LINDA WERTHEIMER, Host: Freon - it's bad, it's banned, but not...music] WERTHEIMER: The government banned Freon, DuPont began phasing it out, planning...lot of attention just now. CFC- 12, or freon, as it's commonly called, has been...
Freon retrofit. (automobile air conditioning)(Brief Article)
Magazine article from: Consumers' Research Magazine; 7/1/1998; ; 700+ words ; ...equipped with A/C systems that use Freon (R-12) refrigerant. When these systems...the expense can be considerable because Freon is no longer produced in the United States...August 1992.) The per-pound cost of Freon is now more than $40 and the typical A...
Footing the bill for Freon flimflammery.(Commentary)
Newspaper article from: The Washington Times; 9/17/1996; ; 700+ words ; ...required? Then try your hand at smuggling Freon - that nasty automotive refrigerant banned...1992. It's now illegal to manufacture Freon (or R-12, as it is commercially known...to keep their air conditioners working. Freon is still available - but it isn't cheap...
Car owners face Freon shock
Newspaper article from: The Journal Record; 8/9/1996; ; 608 words ; ...automobile's ailing air conditioner with Freon, they "hop into the car and take off...designed to operate with dwindling supplies of Freon. The refrigerant, also known as R- 12...As a consequence, the retail price of Freon has zoomed to $25 to $35 per pound...
Witness: Reynolds used Freon in cigarettes without studying effects
News Wire article from: AP Online; 4/2/1998; ; 614 words ; ...J. Reynolds Tobacco Co. began using Freon to process tobacco for low-tar cigarettes...testified Wednesday that the company used Freon for more than two decades. But he said...long-term effects of the combination of Freon and tobacco smoke on humans. Plaintiffs...
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