Process for cleaning oil-wetted parts

Cleaning and liquid contact with solids – Processes – Including use of vacuum – suction – or inert atmosphere

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134 19, B08B 504

Patent

active

057627177

ABSTRACT:
In a process for cleaning oil-wetted structural parts, a vacuum furnace (1) is first evacuated to a defined first pressure to eliminate residual air. Then an inert gas is introduced until a second, subatmospheric pressure is reached, which is above the first pressure, and the inert gas is circulated inside the vacuum furnace. To reduce the heat-up times and to conserve energy and inert gas:

REFERENCES:
patent: 4141373 (1979-02-01), Kartanson
patent: 5205857 (1993-04-01), Yokoyama
patent: 5401321 (1995-03-01), Hugo et al.
patent: 5614029 (1997-03-01), Nakatsukasa et al.
Derwent Abstract, Class M12, AN 95-273225, JP-A-07-173661.
Derwent Abstract, Class M24, AN 74-19098V, SU-A-384 947.
Mitten, "Vacuum Deoiling for Environmentally Safe Parts Cleaning", Metal Finishing, Sep. 1991, pp. 29-30.
AWT Publication, Umweltschutz Im Warmebehadlungs-Betrieb (1993).
ISPEN Publication (date unknown) "ECOVAC: Das Neuartige Oberflachenreiningungs-Und Entfettungs-System".

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