C - Chemistry – Metallurgy – 10 – C
Patent
C - Chemistry, Metallurgy
10
C
196/39, 18/627
C10C 3/08 (2006.01) C10C 3/00 (2006.01) D01F 9/145 (2006.01)
Patent
CA 1113876
ABSTRACT OF THE DI DISCLOSURE A process for producing an optically anisotropic, deformable pitch comprising treating a carbonaceous isotropic pitch with an organic solvent system, said organic solvent system having a solu- bility parameter at 25°C of between about 8.0 and about 9.5, said treating being at a temperature and with an amount of organic solvent system sufficient to provide a solvent insoluble fraction having a sintering point below about 350°C when determined by differential thermal analysis of a sample of the insoluble fraction in the absence of oxygen; separating said solvent insoluble fraction from said organic solvent system; and heating said solvent insoluble fraction to a temperature in the range of from about 230°C to about 400°C whereby said fraction is converted to a deformable pitch containing greater than 75% of an optically anisotropic phase and which phase when extracted with quinoline at 75°C contains less than about 25 wt. % of substances insoluble in said quinoline. Also disclosed is a carbonaceous pitch fiber having greater than 75% by weight thereof of an optically anisotropic phase and less than 25 wt.% of which phase is insoluble when extracted with quinoline at 75°C. These pitches are particularly useful in the formation of shaped carbon articles, such as electrodes
306991
Diefendorf Russell J.
Riggs Dennis M.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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