聚乙二醇改性脱除煤沥青中3，4-苯并芘

摘要

以聚乙二醇为改性剂，研究在溶剂条件下降低煤沥青中3，4-苯并芘的工艺。研究表明，当混合溶剂V环己烷∶V甲苯＝2∶1为反应溶剂、硫酸用量为煤沥青质量的6．67％、聚乙二醇600用量为煤沥青质量的10％、反应温度为80℃、反应时间为5h时，3，4-苯并芘降低率为85．59％。%Using polyethylene glycol as modifying agent ,the process of reducing the content of benzo [ a] pyrene in coal tar pitch under solvent condition is studied .The study shows that when the reac-tion solvent ratio is 2∶1 in volume between cyclohexane and toluene ,the sulfuric acid and polyethy-lene glycol 600 used are 6.67%and 10%in weight of the coal tar pitch respectively ,and the reac-tion takes place under the temperature of 80℃ for 5h, benzo [ a] pyrene can be removed up to 85 .59%.