Liquid Oxygen

Liquid oxygen is produced in large quantities at air separation plants which liquefy and distil air into oxygen, nitrogen and argon

Features

Odourless and colourless
Blue in liquid form
Boiling point -183°C
Reacts chemically with many substances
Vigorously supports combustion
Materials not normally considered flammable can be ignited in an oxygen rich atmosphere

Specification

Oxygen 99.5%
Moisture <2vpm

It is delivered to customers by cryogenic tankers into onsite vacuum-insulated storage vessels which typically, with associated vaporisation equipment, provide several days' supply.

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Common Applications

Chemicals

Many oxidation reactions use pure oxygen rather than air to benefit from higher reaction rates, higher yields, easier product separation and , reduced capital cost of new plants and reduced air emissions
Food

Oxygen can be used in fermentation to maintain an aerobic state. Also used in some cases for modified atmosphere packaging (MAP) of foodstuffs
Fish farms

Higher levels of dissolved oxygen, resulting from the use of oxygen instead of air,allow more fish to be grown and remain healthy in a given volume of water

Lasers

Oxygen is used as an assist gas for the cutting of mild steel and stainless steel
Medical

Breathing oxygen instead of air allows greater oxygenation of the blood stream in situations of impaired breathing action and lung function
Steelmaking and combustion processes

Oxygen is used to replace or supplement air in burners in many industries to obtain increased temperatures to increase throughput and improve energy efficiency. Typical industries include steel, non-ferrous, glass amongst many others
Water treatment

Oxygen can be used in place of air in the activated sludge process to maintain a higher population of micro-organisms. Using oxygen injected through a side stream instead of using a mechanical aerator eliminates surface agitation, reducing odour

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