一种煤沥青的精制方法

Fine purification method for coal tar pitch

Abstract

The invention relates to a coal tar pitch refining method, in particular to a method for refining pitch for coal tar pitch needle coke, impregnant and binding agent for manufacturing high-power and ultrahigh-power graphite electrodes and pitch for manufacturing coal tar pitch carbon fibers. The method is characterized in that the method comprises the following steps: diluting coal tar pitch and the liquid containing coal tar pitch with organic solvent at a weight ratio of the organic solvent to coal tar pitch and the liquid containing coal tar pitch of 1:(5 to 30), removing impurities in the pitch solution by the combination of separation by a centrifuge and filtering with an organic film, and distilling and recovering the solvent in the refined mixture solution to obtain the coal tar pitch free of quinoline insoluble materials. The method has the advantages of good continuity of the separation process and high efficiency, and the pitch contains no quinoline insoluble materials.
一种煤沥青的精制方法,本发明涉及用于制备高功率、超高功率石墨电极的原料煤沥青针状焦、浸渍剂、粘结剂用沥青以及用于制备煤沥青碳纤维的沥青的精制方法。其特征在于:将煤沥青以及含有煤沥青的液体用有机溶剂稀释后,有机溶剂与煤沥青以及含有煤沥青的液体的重量配比是:1∶5-30,用离心机分离与无机膜过滤相结合的方法将沥青溶液中的杂质除去,然后将精制的混合液中溶剂蒸馏回收后,制得不含喹啉不溶物的煤沥青。具有分离过程连续性好,效率高,可以得到完全不含喹啉不溶物的沥青等优点。

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Cited By (18)

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