用氯甲基化脱除焦化苯中噻吩的研究

摘要

The method of removal of thiophene in coking benzene and lightbenzene by chloromethylation is studied. The investigation on thiophene to chloromethylation reaction temperature and feedstock blending proportion shows that thiophene in coking benzene can completely convert into thiophene polymer. Under the reaction temperature of 70℃ and under the ratio condition of coking benzene(containing thiophene 1.4g/L)∶ formaldehyde∶ HCl=6∶1∶1, with the agitating time of 3h, the removal efficiency for thiophene in benzene can be up to 100％ .%研究了用氯甲基化脱除焦化苯及轻苯中噻吩的方法。通过对噻吩的氯甲基化反应的温度与原料配比的考察表明,焦化苯中的噻吩可完全转化为噻吩聚合物。在反应温度为70℃、焦化苯(含噻吩1.4g/L)∶甲醛∶HCl=6∶1∶1的条件下,搅拌反应3h，苯中的噻吩脱除率可达100％。