Title:
【発明の名称】変形撹拌手段を使用する改良撹拌式脱ワツクス
Document Type and Number:
Japanese Patent JPH0813974
Kind Code:
B2
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 crystal wax size the resulting dimensionless number is about 1,500 or less is an acceptable modification.
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Inventors:
Thomas Edwin Broadhurst
Application Number:
JP12271587A
Publication Date:
February 14, 1996
Filing Date:
May 21, 1987
Export Citation:
Assignee:
Exxon Lisa-Chi and Engineering Company
International Classes:
B01D37/00; C10G31/00; C10G73/06; C10G73/32; C10G73/40; (IPC1-7): C10G31/00; C10G73/40
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)
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