Process and apparatus for producing nitrogen and oxygen
Patent 5305610 Issued on April 26, 1994. Estimated Expiration Date: 
April 26, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 26, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1952281 2548377 2861431 2894371 2907174 3296807 3775988 InventorsAssigneeApplicationNo. 573922 filed on 08/28/1990US Classes:62/5, VORTEX TUBE, E.G., RANQUE62/640, Air62/910ExpanderExaminersPrimary: Walsh, Donald P.Assistant: Jenkins, Daniel J. Attorney, Agent or FirmForeign Patent References
International ClassF25B 009/02AbstractThe present invention is a separation process for atmospheric gases. In the process, an atmospheric gas stream, for example air, is compressed and may be partly condensed prior to introduction into a vortex tube air separator. The performance of the tube separation can be upgraded, i.e. by improving the concentration and/or purity of the main oxygen stream, by enhancing the separator efficiency of the vortex tube (VT) apparatus. One approach is by selectively refrigerating the cold end of the tube with partial recycle of nitrogen gas waste stream, effecting a rectification section. Another approach is to increase the heat transfer between the outlet gas stream and the liquid film flowing along the curvilinear periphery of the separator means, by mechanical innovations in its configuration.Field of SearchVORTEX TUBE, E.G., RANQUE | |
