Recovery and recycle of nitrate and nitrite salts from chloride containing quench bath solids
AssigneePark Chemical Company
InventorRobert W. Foreman
Life of this patent
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Abstract
A method is provided for the recovery and recycle of nitrate and nitrite salts present in environmentally hazardous chloride containing quench bath solids, comprising the steps of leaching the solids with hot water to provide an aqueous leachate that depletes the hot water soluble content of the solids, clearing the resulting aqueous leachate of solids, and recycling it while hot into a fused quench bath.
Claims15
A process for the recovery and recycle of nitrate and nitrite salts present in chloride containing quench bath solids in the form of difficultly breakable environmentally hazardous, rock-like masses, comprising the steps of leaching the solids with hot water to provide an aqueous leachate that depletes the hot water soluble content of the solids, clearing the resulting aqueous leachate of residual solids, delivering the leachate while hot into a fused quench bath, and recovering the residual material in the form of hand-crushable solids that are environmentally safe for disposal.
A process for the handling of chloride containing environmentally hazardous solids separating in a nitrate based quench bath, comprising the steps of removing the solids from the bath, cooling and comminuting the solids, leaching the resulting comminuted solids with hot water to obtain an aqueous leachate that raises the chloride content of the solids above about 80% by weight, clearing the resulting leachate while hot into a quench bath, and recovering the residual material in the form of hand-crushable solids that are environmentally safe for disposal.
Dependencies are inferred from the claim text.