Method for generating pollution credits while processing reactive metals
Assignee3M Innovative Properties Company
InventorsDean S. Milbrath, John G. Owens
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Abstract
This invention relates to a method for generating pollution credits while processing molten magnesium, aluminum, lithium, and alloys of such metals by contacting the molten metal or alloy with a gaseous mixture comprising a fluorocarbon selected from the group consisting of perfluoroketones, hydrofluoroketones, and mixtures thereof.
Claims9
A method for generating pollution credits comprising (a) treating molten reactive metal or alloy to protect said molten metal or alloy from reacting with oxygen in air by (1) providing molten metal or alloy and (2) exposing said molten metal or alloy to a gaseous mixture comprising a fluorocarbon selected from the group consisting of perfluoroketones, hydrofluoroketones, and mixtures thereof to yield protected metal or alloy having a protective film thereon and (b) taking allocation of pollution credits.
Dependencies are inferred from the claim text.