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:
Dec. 31, 2024
Filed:
Dec. 06, 2021
Applicant:
Air Products and Chemicals, Inc., Allentown, PA (US);
Inventors:
Paul Higginbotham, Guildford, GB;
John H. Petrik, Bethlehem, PA (US);
Christopher F. Harris, Zionsville, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F25J 1/02 (2006.01); F25J 1/00 (2006.01);
U.S. Cl.
CPC ...
F25J 1/0052 (2013.01); F25J 1/0007 (2013.01); F25J 1/001 (2013.01); F25J 1/0015 (2013.01); F25J 1/0067 (2013.01); F25J 1/0072 (2013.01); F25J 1/0214 (2013.01); F25J 2270/16 (2013.01);
Abstract
Hydrogen is liquefied through a process utilizing refrigeration from hydrogen at one, two, or three different pressures as well as a nitrogen refrigeration cycle. One or more stages of catalyst are used to convert ortho-hydrogen to para-hydrogen as the hydrogen is cooled and liquefied. Subcooled liquid hydrogen feeds the final stage of ortho-hydrogen to para-hydrogen conversion to reduce or eliminate vaporization of the hydrogen during the exothermic ortho-hydrogen to para-hydrogen conversion.