Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1996-04-02
1998-10-06
Caldarola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
502 20, 502 34, 585250, 585262, 585277, 564490, B01J 2034, C07C 503, C07C 502
Patent
active
058175890
ABSTRACT:
A process for regenerating a spent hydrogenation catalyst, comprising the steps of providing a catalyst comprising a support material selected from the group consisting of an inorganic oxide-zeolite composite, carbon and zeolite, and a catalytically active metal phase selected from the group consisting of partially reduced group IB metals and completely reduced group VIII metals, said metal phase being present in an amount of grater than or equal to about 0.03 wt %, and said catalyst having an initial diolefin hydrogenation activity, treating a hydrocarbon feedstock having a diolefin content of greater than or equal to about 0.1% and a nitrite content of greater than or equal to about 2 ppm with said catalyst until said initial diolefin hydrogenation activity of said catalyst decreases to a reduced diolefin hydrogenation activity, flushing said catalyst with an inert gas so as to remove traces of hydrocarbon from said catalyst and thereby provide a flushed catalyst, and regenerating said flushed catalyst by further flushing said flushed catalyst with hydrogen so as to provide a regenerated catalyst having a regenerated diolefin hydrogenation activity which is greater than said reduced diolefin hydrogenation activity.
REFERENCES:
patent: 4683052 (1987-07-01), Degnan, Jr. et al.
patent: 5332705 (1994-07-01), Huang et al.
patent: 5523271 (1996-06-01), De Agudelo et al.
de Agudelo Magdalena Ramirez
de Godoy Zaida Hernandez
Guerra Julia
Navarro Raul
Bullock In Suk
Caldarola Glenn
Intevep S.A.
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