Nitrous Oxide Plants

It is then purified, collected in a gas holder and then compressed to its critical pressures when the gas gets liquified, The Liquid Nitrous oxide is stored in storage vessels which are cooled by water spray and allowed to settle to separate traces of another impurity Nitrogen.Liquid Nitrous oxide is filled into evacuated cylinders, kept on a weighing scale, to get the best purity and correct quantity in cylinders.