C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/250
C10G 73/06 (2006.01) C10G 73/32 (2006.01)
Patent
CA 1288376
ABSTRACT OF THE DISCLOSURE The filtration performance of a slurry containing crystallized wax, dewaxed oil and dewaxing solvent is improved by used of an agitator means which possesses a characteristic dimension which when divided by the average wax crystal diameter yields a dimension- less 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 possess 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 cha- racteristic 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 is an acceptable modification.
536409
Borden Ladner Gervais Llp
Broadhurst Thomas E.
Exxon Research And Engineering Company
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