Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Reexamination Certificate
2005-08-23
2005-08-23
Andrews, Melvyn (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
C075S715000, C134S002000
Reexamination Certificate
active
06932855
ABSTRACT:
A method for recycling metals from swarf includes steps of removing oil in swarf by means of surfactant having a feature of strong hydrophilicity. The steps involves repeated stirring and washing, separating solid from liquid, and separating oil from water so as to force oil separate from the surface of solid, finishing all the steps in 10–30 minutes. Metals after finished the treatment may have only 1% of oil remained thereon, possible to be reused in metalworking. Oil and washing solution are also reusable after treated, so the method is effective both for treating waste and for recycling resources.
REFERENCES:
patent: 3997359 (1976-12-01), Dankoff et al.
patent: 2004/0152614 (2004-08-01), Hatch et al.
Chang James I.
Chiu Neng-Hsin
Jang You-Ming
Lin Chun-Chi
Andrews Melvyn
National Kaohsiung First University of Science and Technology
Rosenberg , Klein & Lee
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