化工进展

• 资源与环境化工 • 上一篇    下一篇

溶剂效应对脱除煤沥青中3,4-苯并芘的影响

孙昱,廖志远,苏龙,曾鹏   

  1. 武汉科技大学化学工程与技术学院,湖北煤转化与新型碳材料重点实验室,湖北 武汉 430081
  • 出版日期:2014-08-05 发布日期:2014-08-05

Solvent effect on removal of benzo[a]pyrene in coal tar pitch

SUN Yu,LIAO Zhiyuan,SU Long,ZENG Peng   

  1. Hubei Coal Conversion and New Carbon Materials Key Laboratory,School of Chemical Engineering and Technology,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Online:2014-08-05 Published:2014-08-05

摘要: 研究了单种溶剂、混合溶剂对3,4-苯并芘的溶解选择性及煤沥青溶解量。并以顺丁烯二酸酐为改性剂、硫酸为催化剂,考察了溶剂效应对降低煤沥青中3,4-苯并芘的影响。研究表明,环己烷、甲苯,环己烷、乙酸丁酯组成的混合溶剂具有较好的3,4-苯并芘溶解选择性和合适的煤沥青溶解量。当环己烷∶甲苯=2∶1(体积比)和环己烷∶乙酸丁酯=2∶1(体积比)为反应溶剂时,能够高效地脱除煤沥青中3,4-苯并芘,煤沥青中3,4-苯并芘降低率分别达到88.26%和90.83%。其原因认为是此类溶剂能使包裹在沥青颗粒内部的3,4-苯并芘释放出来,且3,4-苯并芘与改性剂能够形成均相反应体系,大部分不具有致癌性的高相对分子质量环芳烃与改性剂之间形成两相体系,从而提高了改性剂与3,4-苯并芘的有效反应。

关键词: 焦化, 溶解性, 选择性, 3, 4-苯并芘, 煤沥青

Abstract: The solubility selectivity for benzo[a]pyrene and dissolved amount for coal tar pitch of single solvent,mixed solvents were studied. Using maleic anhydride as modifying agent and sulfuric acid as catalyst,the solvent effect on reducing the concentration of benzo[a]pyrene in coal tar pitch was investigated. The mixed solvents,cyclohexane and toluene,cyclohexane and butyl acetate had appropriate benzo[a]pyrene solubility selectivity and coal tar pitch solubility. When using cyclohexane∶toluene = 2∶1(v/v),cyclohexane∶butyl acetate =2∶1(v/v)as reaction solvent,benzo[a]pyrene in coal tar pitch could be removed efficiently,with decreases of 88.26% and 90.83% for benzo[a]pyrene in coal tar pitch respectively. Using these kinds of solvent,benzo[a]pyrene wrapped in coal tar pitch could be released. In addition,a homogeneous system between modifying agent and benzo[a]pyrene was formed,with most non-carcinogenic high molecular weight PAHs and modifying agent forming a two phase system. As a result,the effective reaction between modifying agent and benzo[a]pyrene was greatly improved.

Key words: coking, solubility, selectivity, benzo[a] pyrene, coal tar pitch

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn