Oxidation-resistant pitches

Details Oxidation-resistant pitches Oxidation-resistant pitches

C - Chemistry, Metallurgy

08

L

6/160

C08L 95/00 (2006.01) C10C 3/02 (2006.01)

Patent

CA 1187653

OXIDATION - RESISTANT PITCHES ABSTRACT OF THE DISCLOSURE A new oxidation-resistant pitch composition is obtained by treating in the molten state a coal tar or petroleum pitch with at least one pitch-soluble and compatible alkyl-aryl sulfonic acid or some salts thereof in an amount of less than 1% of said pitch, with a pitch suitable for making an electrode treated that way, upon subsequent carbonization in conjunction with petroleum coke, an electrode can be formed, with great resistance to oxidation, and with very little dusting. Due to increased coking value of the pitch, the fuming is decreased both during the art of making electrodes and during the use of same in the actual electrolysis thus providing environ- mental benefits. Such a pitch may also be used as a refractory material.

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