LAWRENCE W PRUNESKI
Engineers in Schnecksville, PA
License number
Pennsylvania PE027853E
Category
Engineers
Type
Professional Engineer
Address
Address
Schnecksville, PA 18078
Professional information
Ultra High Purity Oxygen Distillation Unit Integrated With Ultra High Purity Nitrogen Purifier
US Patent:
5682763, Nov 4, 1997
Filed:
Oct 25, 1996
Appl. No.:
8/738989
Inventors:
Rakesh Agrawal - Emmaus PA
Zbigniew Tadeusz Fidkowski - Macungie PA
Lawrence Walter Pruneski - Schnecksville PA
Zbigniew Tadeusz Fidkowski - Macungie PA
Lawrence Walter Pruneski - Schnecksville PA
Assignee:
Air Products and Chemicals, Inc. - Allentown PA
International Classification:
F25J 100
US Classification:
62643
Abstract:
A method for producing ultra high purity liquid oxygen from standard grade liquid oxygen which integrates the oxygen purification process with a nitrogen purification process by utilizing the condensing duty of liquid nitrogen, thereby causing the nitrogen to vaporize which is desirable prior to delivery to a nitrogen purification unit. The method of the present invention includes pressurizing a source of liquid nitrogen and vaporizing at least a portion of the pressurized liquid nitrogen. The resulting high pressure gaseous nitrogen stream is introduced to at least one bottom reboiler/condenser of a high purity liquid oxygen unit, which also purifies standard grade liquid oxygen into ultra high purity liquid oxygen. The gaseous nitrogen provides the needed heat to the distillation columns of the high purity liquid oxygen unit. The condensed nitrogen is subsequently delivered to at least one top reboiler/condenser of the high purity liquid oxygen unit to provide refrigeration to the unit, and at the same time forming gaseous nitrogen which is then introduced to a nitrogen purification unit.