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Worldwide production of R-22 in 2008 was about 800 Gg per year, up from about 450 Gg per year in 1998, with most production in developing countries. [2] R-22 use is being phased out in developing countries, where it is largely used for air conditioning applications.
From 1930 to 1935, they developed dichlorodifluoromethane (CCl 2 F 2 or R12), trichlorofluoromethane (CCl 3 F or R11), chlorodifluoromethane (CHClF 2 or R22), trichlorotrifluoroethane (CCl 2 FCClF 2 or R113), and dichlorotetrafluoroethane (CClF 2 CClF 2 or R114), through Kinetic Chemicals which was a joint venture between DuPont and General ...
The table is sortable by each of the following refrigerant properties (scroll right or reduce magnification to view more properties): Type/prefix (see legends); ASHRAE number
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.
Dichlorodifluoromethane (R-12 or CFC-12), the most commonly used Freon brand refrigerant prior to its ban in many countries in 1996 and total ban in 2010. 1,1,1,2-Tetrafluoroethane (R-134a or HFC-134a), one of the main replacements for the formerly widespread R-12. Opteon halogenated olefins now replacing Freons in many applications.
Banned Books Week this year is from Sept. 22-28. It's usually held during the last week of September. The theme of this year's event, according to the ALA, is " Freed Between the Lines ."
A Robinson R22 helicopter owned by the Philippine Air Force crashes near a public market in Cavite City, Philippines, killing both pilots. (AFP via Barron's) Law and crime. Capital punishment in Vietnam. A court in Vietnam sentences tycoon Trương Mỹ Lan to death for embezzling $12.46 billion from the Sai Gon Joint Stock Commercial Bank.
The Threads image, which has been viewed over 8,000 times as of writing, claims Canada has purportedly banned Trump from entering the country. “Americans, if you’re wondering why Prime ...