Patent ID: 6666904
Filing Date: 2003-12-23
Classification: C03C,C22B,Y02P

Abstract:
A method to extract heavy metals from glass waste, comprising:crushing glass waste into glass particles; filtering out a number of the glass particles that are less than or equal to 2 millimeters in diameter size and re-crushing a number of the glass particles that are greater than 2 millimeters in diameter size until the glass particles are filtered glass particles that are less than or equal to 2 millimeters in diameter size; filling a tank with the filtered glass particles, wherein the tank includes a solution of water (H2O) and Nitric acid (HNO3), wherein the filtered glass particles and the solution form a slurry; circulating the slurry for a first period of time, wherein heavy metals that were originally associated with the filtered glass particles are extracted from the filtered glass particles and mixed with the solution portion of the slurry producing a mixture having treated glass particles and a modified solution that has the extracted heavy metals; removing the mixture from the tank; and separating the treated glass particles and the modified solution from the mixture.