Process for the production of mesophase pitch

Details Process for the production of mesophase pitch Process for the production of mesophase pitch

C - Chemistry, Metallurgy

10

C

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C10C 3/02 (2006.01) C10C 3/00 (2006.01) D01F 9/145 (2006.01)

Patent

CA 1334012

An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated for a period of time at an elevated temperature while passing an oxidatively reactive sparging gas such as a mixture of oxygen and nitrogen through the feedstock. The oxidatively treated feedstock is then subjected to a heat soak, for a longer period of time in the absence of a sparging gas. Thereafter the heat soaked feedstock is heated at an elevated temperature in the presence of a non-oxidative sparging gas for a time period equal to or less than the heat soak to produce an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.

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