Solid material comminution or disintegration – Processes – With heating or cooling of material
Reexamination Certificate
2011-07-19
2011-07-19
Rosenbaum, Mark (Department: 3725)
Solid material comminution or disintegration
Processes
With heating or cooling of material
C241S024110, C241S025000
Reexamination Certificate
active
07980494
ABSTRACT:
The present invention provides an integral system for recycling post consumer motor-oil plastic containers. Oils and especially motor-oil, physically attaches to its HDPE (high density polyethylene) containers demanding a unique recycling process. As described by this patent, oil-contaminated plastic containers are thermally drained and mechanically freed from their labels and aluminum sealing rings. Unlabeled containers are further shredded through oil-free flake-cutting process, in which, plastic melting is minimized, thus preventing oil to be trapped inside the plastic structure. A hot water bath of sulfonic acid and/or detergents, containing the shredded flakes, is subjected to a very high turbulence in the absence of air (water sealed), which induces liquid cavitation. High rotational turbulence combined with cavitation impacts (generated by fast evaporation/condensation/implosion) supply enough surface energy to liberate the strongly attached oil molecules, which are further trapped by the detergent bath. The bath can be regenerated indefinitely. Centrifugation of the washed flakes, hot and cold water rinsing and further hot-air drying, complete the process before re-pelletizing industrial quality HDPE with the full characteristics of new material.
REFERENCES:
patent: 5232607 (1993-08-01), Lundquist
patent: 5316591 (1994-05-01), Chao et al.
patent: 5711820 (1998-01-01), Smith et al.
Lizarraga Juan J.
Rosenbaum Mark
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