Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1974-08-29
1976-06-29
Hart, Charles N.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
68 18R, 137119, 137172, 210 96R, 210101, 210105, 210127, 210139, 210197, B01D 1702, B01D 2110
Patent
active
039666026
ABSTRACT:
The invention is directed to process and apparatus for automatically restoring to usefulness spent cleaning and/or drying liquids comprising an aqueous phase and an oil phase, the latter comprising 1,1,2-trichloro-1,2,2-trifluoroethane, as the principal component, and a surfactant, said process and apparatus characterized in that electrical conductometric means, liquid level sensing means and time programmed means cooperate and automatically direct separation and removal means in the separation and removal of the aqueous phase from the oil phase, said process further characterized in that, optionally, at least one of the group consisting of 1,1,2-trichloro-1,2,2-trifluoroethane, surfactant and water is added to the oil phase, the amount of water added being insufficient to produce an aqueous phase, to restore the oil phase to usefulness as a cleaning and/or drying liquid.
REFERENCES:
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patent: 2940287 (1960-06-01), Henderson
patent: 3206951 (1965-09-01), Sieber
patent: 3253711 (1966-05-01), Young
patent: 3269155 (1966-08-01), Shaw
patent: 3273576 (1966-09-01), Fluegel et al.
patent: 3561917 (1971-02-01), Michaels et al.
patent: 3728074 (1973-04-01), Victor
E. I. Du Pont de Nemours and Company
Hart Charles N.
Mukai Robert G.
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