学术
摘 要:
在重水和水作溶剂下，采用Pd／Fe双金属体系在常温常压下对1，2，4-TCB的脱氯机理进行了研究。结果表明，TCB脱氯是逐步完成的；TCB在催化脱氯过程中先脱氯成为DCBs，再依次脱氯为氯苯和苯；重水作溶剂，用氘示踪可推知为了整个脱氯反应的速度和完成度，脱氯中间产物1，2-DCB含量会明显大于1，3-DCB和1，4-DCB，以便在下一阶段脱氯反应中可以更快的脱氯。[著者文摘]
文章出处:
《江西化工》-2007年4期 -82-84页
栏目信息:
分 类 号:
Mechanism of Dechlorination of 1,2,4 -Trichlorobenzene by Pd/Fe Bimetal
QIU Gang, XIE Ning-zi ,CHEN Shao-jin （Research Institute of Environmental Chemistry and Technology, Hanshan Normal University, Chaozhou , Guangdong 521041, China）
Abstract:
Pd/Fe bimetal catalysts were utilized for the the mechanism of deehlorination of 1,2,4 - trichlorobenzene （ 1,2, 4- TCB） in aqueous/heavy water medium at ambient temperature and pressure. Batch experiments demonstrated 1,2 - DCB, 1,3- DCB and 1,4- DCB represent stable partially dechlorination intermediates, then dechlorinate to chlorobenzene, and finally benzene. Heavy water was introduced into mechanical system and Deuterium was followed through the course of a process, providing it＇s evident that the content of 1,2 - DCB was more than the content of 1,3 - DCB and 1,4 - DCB, in order to make the whole dcehlorinated reaction carried out fast and thoroughly.[著者文摘]
Key words:
Pd/Fe Bimetal Heavy water Reductive Dechlorination 1,2,4 - trichlorobenzene（ 1,2,4 - TCB） Mechanism
基金资助:
广东省科技攻关项目2003C32910
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