Summary: Air, an important industrial raw material, is first filtered to remove any solid matter. Then its constituent gases-nitrogen, oxygen, and other trace gases-can be separated by compressing the air, cooling it, and then allowing it to expand, which cools it further. Since each gas liquefies at a different temperature, the gases can easily be separated. As the air expands, it is used to drive...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007
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Summary: Two very important products derived from air are ammonia and nitric acid. Ammonia is produced when hydrogen gas is extracted from natural gas and steam, mixed with nitrogen from the air, and heated. The resulting ammonia gas is condensed into liquid form, to be made into other chemicals. Ammonia is also used to make nitric acid, basic in the production of fertilizers, detergents, and many other...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007