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US 4,244,935 AGranted
Method of forming metal chlorides
AssigneeAluminum Company of America
InventorM. Benjamin Dell
Life of this patent
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Abstract
A method of forming the chloride of a metal-oxygen-containing substance, including the steps of coating particles of such substance with green carbon, i.e. carbon which contains substances more volatile than carbon, heating the coated particles to drive off the volatile matter and produce openings such as pores and fissures, and then reacting the particles from the step of heating with a source of chlorine.
Claims11
A method of chlorinating particles of a substance containing metal and oxygen, comprising:
- coking a liquid or gaseous coking charge stock on such particles for coating them with carbon which contains volatile matter under conditions permitting retention of volatile matter,
- heating the coated particles for driving off the volatile matter and for creating openings in the coating, and
- exposing the particles with the thus-opened coating to a source of chlorine for producing the chloride of said metal.
Dependencies are inferred from the claim text.