Low solids content, coal tar based impregnating pitch

Details Low solids content, coal tar based impregnating pitch Low solids content, coal tar based impregnating pitch

C - Chemistry, Metallurgy

10

C

196/38, 309/42

C10C 3/04 (2006.01)

Patent

CA 1278543

ABSTRACT LOW SOLIDS CONTENT, COAL TAR BASED IMPREGNATING PITCH A novel coal tar based, low solids content, pitch is produced by oxidizing a selected coal tar distilla- tion fraction with air or oxygen at elevated tempera- tures. This pitch is applicable to end use in which low solids content is desirable. Specifically it may be advantageously applied to the impregnation of carbon electrodes. The oxidized selected coal tar based low solids material described is characterized by high carbon yield and higher product density and has a higher in situ coking value and lower sulfur content which make it particularly beneficial when it is used as an impregnating pitch as compared to the currently commercially used petroleum based pitch.

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