Boiler additives for oxygen scavenging
AssigneeNalco Chemical Company
InventorManuel Slovinsky
Life of this patent
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Abstract
A method of removing dissolved oxygen from boiler water which comprises adding to the water an oxygen scavenging amount of carbohydrazide.
Claims6
A method of removing dissolved oxygen from boiler water having an alkaline pH which comprises adding to said boiler water an oxygen scavenging amount of carbohydrazide, said oxygen scavenging amount being at a level of a least 0.5 moles of carbohydrazide per mole of dissolved oxygen.
The method of removing dissolved oxygen from boiler water having an alkaline pH and passivating boiler surfaces comprising adding to the boiler water at least 0.5 moles of carbohydrazide per mole of dissolved oxygen along with from 0.2 up to about 20% by weight based on carbohydrazide of a catalyst capable of undergoing oxidation-reduction reactions.
Dependencies are inferred from the claim text.