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US 7,078,122 B1Granted
High efficiency process for treating mixed metal waste
OwnerAriel Rosenberginventor
Life of this patent
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Abstract
A process for rendering hazardous materials present in multi-element waste non-hazardous, and for recovering valuable components of said waste, particularly metals, comprising contacting the waste with an aqueous solution of HX, wherein X is halogen, thereby converting metals present in the waste to the corresponding halides, and subsequently separating said metal halides from other components of the reaction mixture and from each other.
Claims10
A process for recovering metals from electrical batteries having metal casings and for rendering hazardous materials present therein non-hazardous, wherein said process comprises the steps of:
- a) placing the electrical batteries while still enclosed in their metal casings in an aqueous solution of HX, wherein X is chlorine or bromine,
- and mechanically agitating said electrical batteries to form an aqueous reaction mixture into which gases released from said electrical batteries are absorbed;
- b) ventilating hydrogen gas emitted from the solution;
- c) filtering said reaction mixture to form a solid residual waste and a first filtrate containing water-soluble metal halides formed from the reaction of HX and the electrical batteries;
- and
- d) recovering metals from said metal halides.
3 more elements
Dependencies are inferred from the claim text.