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. 24, 2026
Filed:
Dec. 14, 2022
Applicants:
Richard M. Kelly, East Amherst, NY (US);
Ashley Zachariah, Lewiston, NY (US);
Perry R. Pacouloute, Lockport, NY (US);
Inventors:
Richard M. Kelly, East Amherst, NY (US);
Ashley Zachariah, Lewiston, NY (US);
Perry R. Pacouloute, Lockport, NY (US);
Assignee:
PRAXAIR TECHNOLOGY, INC., Danbury, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 38/58 (2006.01); B01J 8/02 (2006.01); B01J 21/04 (2006.01); B01J 21/20 (2006.01);
U.S. Cl.
CPC ...
B01J 38/58 (2013.01); B01J 8/0285 (2013.01); B01J 21/04 (2013.01); B01J 21/20 (2013.01); B01J 2208/00327 (2013.01);
Abstract
Catalyst beds in refinery reactors require periodic change out due to build-up of contamination and loss of activity. The instant invention mists a liquid chemical solvent in nitrogen carrier gas to solubilize oils and heavy hydrocarbons and to further desorb light hydrocarbons and remove hydrogen sulfide (HS), to effect decontamination. This process can be advantageously combined with nitrogen cool-down processes in preparation for catalyst unloading.