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US 5,496,785 AGranted
Dual impregnated activated carbon
AssigneeMinnesota Mining and Manufacturing Company
InventorMary J. Abler
Life of this patent
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Abstract
A dual-impregnated activated carbon composition includes activated carbon impregnated with a Group 6-12 metal salt and a Group 1 metal carbonate salt, where the molar ratio on the activated carbon of the Group 1 metal to the Group 6-12 metal is 1 or greater. The dual-impregnated activated carbon composition is particularly suitable for filtering gaseous contaminants.
Claims8
A method of making a dual-impregnated activated carbon composition capable of removing gaseous contaminants from a fluid, which method consists essentially of:
- (a) impregnating activated carbon with at least one first metal salt that contains a metal from Groups 6-12;
- and
- (b) impregnating the activated carbon with at least one second metal carbonate salt that contains a Group 1 metal;
- wherein the molar ratio on the activated carbon of the Group 1 metal or metals to the Group 6-12 metal or metals is 1 or greater.
1 more element
Dependencies are inferred from the claim text.