Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1986-05-21
1988-03-01
Sneed, Helen M. S.
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
196 145, C10G 4308
Patent
active
047284137
ABSTRACT:
The filtration performance of a slurry containing crystallized wax, dewaxed oil and dewaxing solvent is improved by use of an agitator means which possesses a characteristic dimension which when divided by the average wax crystal diameter yields a dimensionless number of about 1,500 or less, preferably about 1,000 or less, more preferably about 500 or less, most preferably about 250 or less. Use of an agitator means which possesses a characteristic dimension yielding a dimensionless number in the range recited above causes a reduction in the size of the vortex generated as the agitator means passes through the slurry during chilling. As a consequence, more intimate contacting of the wax particles during chilling is promoted.
The needed characteristic dimension of the agitator may be obtained in any number of equally acceptable ways. Single large agitator blades can be replaced by more numerous smaller blades; large blades can be perforated, notched, etc.
Any alteration which causes the agitator characteristic dimension to be reduced so that when it is divided by the average cyrstal wax size the resulting dimensionless number is about 1,500 or less in an acceptable modification.
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Allocca Joseph J.
Caldarola Glenn
Exxon Research and Engineering Company
Sneed Helen M. S.
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