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,...
Patent
1998-08-03
2000-06-27
Wood, Elizabeth D.
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,...
502 22, 502 25, 502 28, B01J 2034, B01J 3860
Patent
active
060806966
ABSTRACT:
Methods are disclosed for the regeneration of fouled ion exchange (IX) resins. In one embodiment, the fouled resin is treated simultaneously with reducing agent and acid. In a preferred embodiment, fouled resin is treated with reducing agent and then with acid. Use of reducing agent prior to the use of acid results in surprisingly unexpected improved cleaning as compared to simultaneous treatment with reducing agent and acid.
REFERENCES:
patent: 4886598 (1989-12-01), Barkey
patent: 5019542 (1991-05-01), Bento
patent: 5409737 (1995-04-01), Kozak et al.
patent: 5453201 (1995-09-01), Etzel et al.
Duke Hilton
Featherstone John L.
Marston Charles R.
MidAmerican Energy Holdings Company
The Dow Chemical Company
Wood Elizabeth D.
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