B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/13, 196/259
B01D 61/14 (2006.01) C10G 31/06 (2006.01) C10G 31/09 (2006.01) C10G 73/32 (2006.01)
Patent
CA 1323843
ABSTRACT OF THE DISCLOSURE A method is disclosed for reducing the cloud point of materials comprising the steps of chilling the waxy oil so as to achieve submicron crystallization followed by ultrafiltration thereby effecting separa- tion of a permeate of reduced cloud point from a retentate. Chilling to produce submicron crystalliza- tion is to a temperature about 3°C or less above the cloud point of the material, preferably from 0.5 to 2°C above the cloud point of the material, most preferably between 1 to 2°C above the cloud point of the material. In general, any mixture, solution or melt containing components which crystallize at different temperature can be separated by this procedure. The method is especially useful for reducing the cloud point of waxy hydrocarbon oils. The ultrafiltration membrane used will be one which is inert in and non-reactive with the components of the solution, mixture or melt, will not melt at the temperatures employed, which possesses an effective pore size smaller than the submicron crystals formed upon chilling and which does not have a strong chemical affinity for the crystallized component of the feed mixture, solution or melt.
606831
Borden Ladner Gervais Llp
Imperial Oil Limited
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