C - Chemistry – Metallurgy – 10 – C
Patent
C - Chemistry, Metallurgy
10
C
196/39
C10C 3/16 (2006.01) C10C 3/08 (2006.01) D01F 9/145 (2006.01)
Patent
CA 1148105
ABSTRACT OF THE DISCLOSURE The present invention contemplates a process for treating an isotropic carbonaceous graphitizable pitch with an organic fluxing liquid to provide a fluid pitch which has suspended therein substantially all of the quinoline insolu- ble material in the pitch and which solid material is readi- ly separable by filtering, centrifugation and the like. Thereafter, the fluid pitch is treated in at least two steps with an antisolvent compound, the sum total of which is suf- ficient to precipitate at least a substantial portion of the pitch, the amount of antisolvent employed in each step in- creasing from the first step to the last step. In a parti- cularly preferred embodiment of the present invention, the fluid pitch is treated in two steps with an antisolvent compound with from 5% to 15% of the antisolvent compound being used in the first step and from 85% to 95% of the antisolvent compound being used in the second step.
370940
Borden Ladner Gervais Llp
Imperial Oil Limited
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