Mineral oils: apparatus – Dewaxing
Patent
1988-06-20
1989-12-05
Woodard, Joye L.
Mineral oils: apparatus
Dewaxing
208 33, 208 38, 208DIG1, C10G 7334
Patent
active
048850624
ABSTRACT:
A control system controls a lubricating oil dewaxing apparatus. The temperature of waxy oil flowing through the apparatus is controlled. A sequential plurality of temperature sensing means senses the temperature of the waxy oil. A Comparing Means determines an isothermal heat transfer zone corresponding to latent heat transfer wax crystallization. Temperature upstream of the isothermal zone is controlled to a selected chilling rate. Temperature downstream of the isothermal zone is controlled to a selected filtering temperature. The control system effects the growth of wax crystals of a uniform and moderate size for optimum filtering rate and oil content.
REFERENCES:
patent: 3249526 (1966-05-01), Bodington
patent: 4262790 (1981-04-01), Castiglione
Gerondale Michael J.
Harrison Charles W.
Ong James O. Y.
Patrone Anthony J.
Morgan Richard A.
Park Jack H.
Priem Kenneth R.
Texaco Inc.
Woodard Joye L.
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