US Patent No: 7,309,408
Number of patents in Portfolio can not be more than 2000
Industrial wastewater treatment and metals recovery apparatus
Stats
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Dec 18, 2007
Issued date -
Jun 11, 2003
filing date -
10/458,672
serial no -
Expired
status
Importance
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Abstract
An apparatus for industrial wastewater treatment and the electrolytic recovery of metals from solutions is disclosed. It comprises two or more plates with electricity conducting surfaces arranged in parallel and separated by insulating gaskets, two heads and a hydraulic ram or other mechanical means to press the group of plates between the heads. Plates and gaskets pressed together form chambers where metal recovery and other electrochemical reactions take place. Holes bored on the plates or on the gaskets separating them allow the solutions to flow in and out of the chambers. The solutions in the chambers close the electrical circuit between the conducting surfaces of the plates and allow an electrical current to flow from one plate to the other closing also a circuit between the terminals of an electrical current source. The apparatus can be easily manufactured by retrofitting a conventional filter press to perform electrochemical reactions assisting in the separation and partial decomposition of anions and cations and the recovery of metals by electrolysis. The gaskets between plates may form channel-like chambers of intricate flow path creating a high turbulence that permits oxidation and reduction reactions as well as electrolytic metal recovery to effected at a wide range of current densities.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,340,457 Electrolytic cell | 2 | 1993 | |
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| 5,139,664 Plate and cell holder | 1 | 1991 | |
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| 5,873,986 Metal recovery apparatus | 7 | 1997 | |
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| 5,565,107 Process and apparatus for purifying streams | 8 | 1994 | |
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| 6,451,183 Method and apparatus for electrowinning powder metal from solution | 9 | 2000 | |
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| 5,421,977 Filter press electrolyzer | 5 | 1993 | |
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| 6,298,996 Three dimensional electrode for the electrolytic removal of contaminants from aqueous waste streams | 6 | 2000 | |
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| 5,587,064 Waste water purification process and apparatus | 2 | 1995 | |
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| 4,832,804 Electrolytic cell | 4 | 1987 | |
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| 5,529,672 Mineral recovery apparatus | 4 | 1994 | |
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| 5,753,099 Metal recovery | 9 | 1996 | |
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| 5,093,007 Process for removal of inorganic and cyanide contaminants from wastewater | 19 | 1990 | |
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| 4,420,401 Solution waste treatment | 24 | 1981 | |
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| 4,894,128 Membrane unit for electrolytic cell | 9 | 1986 | |
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| 4,715,938 Method and apparatus for electrolyzing water | 4 | 1986 | |
| 5,102,522 Metal recovery apparatus | 1 | 1990 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 18, 2015 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 18, 2019 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |