F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01)
Patent
CA 2121879
PROCESS AND APPARATUS FOR PRODUCING OXYGEN AT AN ABOVE-ATMOSPHERE PRESSURE ABSTRACT A process and apparatus for separating air in which a refrigerant stream produced at the top of a single column is expanded with the performance of work. Such expansion can be carried out in an expansion machine coupled to a recycle compressor by an energy dissipative brake. An oxygen stream is removed from a bottom region of the column and a compressor compresses an oxygen stream to column pressure which is at an above atmospheric delivery pressure. After compression, the oxygen stream is divided into two partial streams. One of the two partial streams is fed back into a bottom region of the column as a vapor to provide boil up while the other of the two partial streams is taken as a product which having been derrived from the compressed stream is therefore at the above-atmospheric delivery pressure. The refrigerant stream is heat exchanged countercurrently with incoming air to be separated in order to add refrigeration.
Gowling Lafleur Henderson Llp
The Boc Group Inc.
LandOfFree
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