C - Chemistry – Metallurgy – 10 – C
Patent
C - Chemistry, Metallurgy
10
C
196/39
C10C 3/08 (2006.01) D01F 9/145 (2006.01) D01F 9/32 (2006.01)
Patent
CA 1131151
ABSTRACT OF THE DISCLOSURE Isotropic carbonaceous pitches are fluxed with an organic liquid thereby providing a fluid pitch which has substantially all of the quinoline insoluble material suspended in the pitch and which quinoline insoluble material is readily separable from the fluid pitch by filtration, centrifugation and the like. Thereafter the pitch is treated with an anti-solvent so as to precipitate at least a substantial portion of the pitch free of the quinoline insoluble solids. Indeed the anti-solvent preferably is an organic solvent or mixture of solvents having a solubility parameter at 25°C of between about 8.0 ant about 9.5 ant is used in an amount sufficient to provide a solvent insoluble fraction thermally convertible into a deformable pitch containing greater than 75X of anoptically anisotropic phase.
345579
Borden Ladner Gervais Llp
Imperial Oil Limited
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