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US 12,629,668 B2Granted
Method of remanufacturing spent catalyst for heavy oil desulfurization
AssigneeHanseo University Academic Cooperation Foundation
InventorHea Kyung Park
Life of this patent
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Abstract
Proposed is a method of remanufacturing a spent catalyst for heavy oil desulfurization. More particularly, proposed is a method of remanufacturing a spent catalyst for heavy oil desulfurization, in which the spent catalyst can be used as a substitute for a fresh catalyst, have economic feasibility, and reduce the environmental burden by reusing a spent catalyst that is to be discarded or buried.
Claims11
A method of remanufacturing a spent catalyst for heavy oil desulfurization, the method comprising:
- (a) performing heat treatment on a spent catalyst for heavy oil desulfurization;
- (b) performing dry mixing by adding a spinel-structured metal oxide represented by Formula 1, a solid polycarboxylic acid, and a catalytically active material precursor to the spent catalyst obtained through the heat treatment;
- and
- (c) performing calcination of the resulting mixture obtained by the dry mixing,
- XAl2O4 [Formula 1]
- wherein in Formula 1, X is Ni, Cu, or Zn.
3 more elements
Dependencies are inferred from the claim text.