Surface active agent

摘要

PCT No. PCT/JP85/00059 Sec. 371 Date Sep. 23, 1985 Sec. 102(e) Date Sep. 23, 1985 PCT Filed Feb. 14, 1985 PCT Pub. No. WO85/03647 PCT Pub. Date Aug. 29, 1985.A surfactant is obtained by treating a mixture of 20 to 95 wt. % of a thermal cracking oil fraction obtained by thermally cracking a petroleum heavy residual oil at 400 DEG to 700 DEG C., for example, by delayed coking and 80 to 5 wt. % of other aromatic source, for example, an aromatic fraction having a comparatively high boiling point with an acid catalyst, and sulfonating and neutralizing the product. This surfactant is used as a dispersing agent for a coal-oil mixture (COM).