How is oxygen separated from air?

Answer 1

How do you separate nitrogen from oxygenoxygen and nitrogen can be separated. Air is the commercial source for many of the gases it contains. It is separated into its components by fractional distillation of liquefied air. Before air is liquefied, water vapor and carbon dioxide are removed, because these substances solidify when cooled and would clog the pipes of the air liquefaction plant. The dry, CO2-free air is compressed to about 200 atmospheres. This compression causes the air to become warm, and the heat is removed by passing the compressed air through radiators. The cooled, compressed air is then allowed to expand rapidly. The rapid expansion causes the air to become cold, so cold that some of it condenses. By the alternate compressing and expanding of air, most of it can be liquefied. Nitrogen is obtained from liquid air by distillation at -196°C. The gas obtained by this process is actually a mixture of nitrogen and about 1.25% noble (or "inert") gases, argon, neon, krypton, and xenon. Nitrogen is second only to sulfuric acid in the mass produced by the U.S. chemical industry. Its major uses are as an inert blanketing atmosphere in chemical processing (14%), electronics (15%), and, in liquid form, as a freezing agent (21%). Nitrogen is used to make agricultural fertilizers, such as ammonia and nitrates.

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Answer 2

Fractional Distillation

As air is a mixture of gases, it must first be liquefied.

This is done by lowering the temperature and increasing the pressure.

It is firstly compressed and CO2 and water vapour are removed.

The remaining air is then cooled to about 103 K. It is allowed expand suddenly which causes it to cool further so that it becomes liquefied.

The liquid air is allowed to heat up slowly in a fractionating column.

At 77 K, the liquid nitrogen boils off as a gas and is collected. Liquid oxygen boils at the higher temperature of 90 K.

The liquid oxygen is then stored in an insulated container.

Answer 3

There are several ways to do it, but the industrial way is to liquify the atmosphere in a very cold container. At certain points the higher liquification-point fractions are poured out and the operation continues until all the gas is liquified and separated. Nitrogen makes up most of what they get, so liquid nitrogen is very cheap. Oxygen comes out second. Argon third.

Answer 4

Nitrogen and oxygen are extracted from air by compressing and cooling to convert them to a liquid. Oxygen is the first of these two to liquefy Other gases such as argon and carbon dioxide are also extracted from air during this process. The temperatures at which the various gasses liquefy depends on the exact pressure and many vary quite a bit.

Answer 5

air is made into a liquid. (allow air too) boil or evaporate. Condense the vapors /or collect the vapors in order (of evaporation)

Answer 6

The technique is called fractional distillation. Air is cooled to a liquid and then allowed to boil. The various component gases boil at different temperatures allowing separation.

Answer 7

freeze it one will freeze before the other it gets cold relly quickerly

Answer 8

1. Distillation of liquefied air

2. Separation on molecular sieves

Answer 9

heat it slightly. The nitrogen will boil off before the oxygen and argon content of air.

Answer 10

Fractional distillation is used to separate two liquids, so you need to cool nitrogen and air to make them into liquids and then use fractional distillation.