Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Treating with a liquid or treating in a liquid phase,...
Reexamination Certificate
2005-04-12
2005-04-12
Silverman, Stanley S. (Department: 1754)
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Treating with a liquid or treating in a liquid phase,...
C502S026000, C502S027000, C502S028000, C502S029000, C502S033000
Reexamination Certificate
active
06878654
ABSTRACT:
The present invention provides a process for regenerating a spent aromatics alkylation or transalkylation catalyst comprising a molecular sieve by contacting the spent catalyst with an oxygen-containing gas at a temperature of about 120 to about 600° C. and then contacting the catalyst with an aqueous medium, such as an ammonium nitrate solution, an ammonium carbonate solution or an acid solution.
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Beck Jeffrey S.
Dandekar Ajit B.
Hryniszak Michael
Keville Kathleen M.
Stern David L.
ExxonMobil Chemical Patents Inc.
Kubena Linda A.
Silverman Stanley S.
Strickland Jonas N.
Tyus Darryl M.
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