Mineral oils: processes and products – Refining – Purifying used oil
Patent
1983-10-26
1985-05-07
Gantz, Delbert E.
Mineral oils: processes and products
Refining
Purifying used oil
208179, 208188, 210178, 210179, 210256, 210803, C10M 1100
Patent
active
045156840
ABSTRACT:
There are provided a process and apparatus for the reclamation of oil from emulsified mixtures of oil, water and particulate solids. Basic to the process is the introduction of the emulsified mixture to undergo reclamation into a settler providing an internal mixing centerwell in communication with a surrounding settling tank at a first temperature. Typically, the surrounding settling tank consists of a cylindrical zone and a conical zone. At a base of the settling zone is an exhaust for sludge and, if desired, water. At the opposed or upper end of the settling zone is a clarified-oil outlet, which is preferably in the form of an annular, peripheral weir. The mixing centerwell has an inlet and outlet for flow of a heating fluid, typically steam; or of a cooling fluid, typically water, therethrough. The emulsion and demulsifying agent are added to the central mixing zone. Agitation is substantially confined thereto. Operation may be on a batch, semi-continuous or continuous basis. Only one settling system is required for batch operation. Two or more settling tanks are operated in series for semicontinuous or continuous operation. Clarified oil is passed to a surge zone operated with a dessicating filter to remove final quantities of solids and water from the oil.
REFERENCES:
patent: 1791473 (1931-02-01), Grisbaum
patent: 3247105 (1966-04-01), Gustafson
patent: 3607721 (1971-09-01), Nagy
patent: 3837493 (1974-09-01), Liu
patent: 4259185 (1981-03-01), Mixon
CBM-Oil Reclamation Systems, Inc.
Gantz Delbert E.
Johnson Lance
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