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
1981-11-12
1983-10-04
Konopka, P. E.
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,...
423321R, 502 27, B01J 2034, B01J 2020, C01B 2516
Patent
active
044077254
ABSTRACT:
Spent activated carbon previously used to remove humate-type organic impurities from an aqueous inorganic acid solution is regenerated by a specific chemical regeneration process. According to this process, the spent carbon is subjected to the following treatments: (1) a first water wash, (2) a caustic wash in which at least 1.5% free caustic is maintained, (3) a warm and preferably hot water wash, and (4) an optional periodic acid wash. The process is particularly applicable to regenerating activated carbon used to remove humates from wet process phosphoric acid.
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Allen Hanceford L.
Berry William W.
Leibfried Robert W.
Dewey Robert H.
International Minerals & Chemical Corp.
Konopka P. E.
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