The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2013
Filed:
Jun. 16, 2009
Henry Edward Howard, Grand Island, NY (US);
Richard John Jibb, Wheatfield, NY (US);
David Ross Parsnick, Amherst, NY (US);
Todd Alan Skare, Madrid, ES;
Maulik Shelat, Williamsville, NY (US);
Henry Edward Howard, Grand Island, NY (US);
Richard John Jibb, Wheatfield, NY (US);
David Ross Parsnick, Amherst, NY (US);
Todd Alan Skare, Madrid, ES;
Maulik Shelat, Williamsville, NY (US);
Praxair Technology, Inc., Danbury, CT (US);
Abstract
The present invention relates to a method and apparatus for producing a pressurized product stream product by cryogenic rectification. A main heat exchanger, used in the cryogenic rectification, warms a pumped product stream composed of oxygen-rich or nitrogen-rich liquid and thereby produces the pressurized product stream. Layers of the main heat exchanger are designed such that a reduction in the heat transfer area provided within the main heat exchanger for warming the pumped product stream occurs at a location at which the temperature of the pumped product stream exceeds either the critical or a dew point temperature of such stream. The reduction in heat transfer area leaves regions of the layers able to heat or cool another stream that is used in connection with the cryogenic rectification. Such other stream can be a refrigerant stream that allows the introduction of additional refrigeration to increase production of liquid products.