Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1975-12-09
1977-03-22
Levine, Herbert
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
196 145, C10G 4304
Patent
active
040135411
ABSTRACT:
Deoiling of slack wax or other similar wax composition is accomplished while the wax is confined in a series of cells which are spaced apart by only one-sixteenth to one-half inch and which are vertically or otherwise disposed for drainage along the surfaces thereof from an upper margin to a lower margin. The spaces between the plates are filled to a depth of 4 to 24 inches, preferably 6 to 12 inches, with wax in the melted state while the spaces between the plates are closed off at their lower margins by a body of liquid, preferably a body of the wax, that is of substantial depth underneath the lower margins of said plates and is maintained in contact with the lower margins of the plates. The temperature of the plates is then lowered by lowering the temperature of a temperature-controlling fluid such as water that is flowed through a multiplicity of conduits that traverse the plates in thermally-conductive relation therewith with concomitant solidification of the wax between the plates. While the wax is confined in the solid state the body of liquid is removed, which removal may be facilitated by application of heat in the case of a liquid such as wax. After removal of the body of liquid the temperature of the wax between the plates is gradually increased by gradually heating the temperature-controlling fluid with concomitant drainage of the lower melting point constituents from the spaces between the plates for their recovery separated from the higher melting point constituents which remain between the plates and which are subsequently recovered by raising the temperature of the temperature-controlling fluid to a still higher temperature until the higher melting point wax components are melted for drainage and recovery separated from the lower melting point constituents.
REFERENCES:
patent: 3926776 (1975-12-01), Irwin et al.
Aufhauser Alfred
Irwin Roy E.
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