四甲基脲气相法合成工艺开发  

Development of Gas Phase Process for Synthesis of Tetramethylurea

作　　者：杨振宁 周树新 唐勇 周家伟 王杰 彭圣娟 张兴强 YANG Zhen-ning;ZHOU Shu-xin;TANG Yong;ZHOU Jia-wei;WANG Jie;PENG Sheng-juan;ZHANG Xing-qiang(Phosgene Derivatives Engineering Research Center,Chongqing Changfeng Chemical Industry Co.,Ltd.,Chongqing 401221,China)

机构地区：[1]重庆长风化学工业有限公司光气衍生物工程技术研究中心,重庆401221

出　　处：《广州化工》2023年第7期159-162,共4页GuangZhou Chemical Industry

基　　金：重庆英才计划(CQYC20210305201)。

摘　　要：针对四甲基脲在其已知的生产方法中需要使用大量氢氧化钠导致光气消耗过高并产生大量的高盐废水的问题,设计了气相反应系统并开发了一种四甲基脲合成的改进工艺,减少了大量氢氧化钠的使用。通过控制原料比、反应温度、停留时间等参数,四甲基脲的含量达到94.57%,酰氯的含量可以达到99.08%,通过将酰氯再次汽化,直接与二甲胺原料气按1∶1进料合成的粗品中,四甲基脲的含量提高到98.31%,具有很好的工业化应用价值。For the known production method of tetramethyl urea,a large amount of sodium hydroxide was needed,which led to high phosgene consumption and a large number of high salt wastewater.A gas phase reaction system was designed,and an improved process for the synthesis of tetramethyl urea was developed.The use of sodium hydroxide was reduced.By controlling the raw material ratio,reaction temperature,residence time and other parameters,the content of tetramethylurea and acyl chloride could reach 94.57%and 99.08%,respectively.The content of tetramethylurea could be increased to 98.31%in the crude product synthesized by re vaporizing acyl chloride and directly feeding with dimethylamine raw gas at 1∶1,which had good industrial application value.

关 键 词：四甲基脲 气相反应 光气 

分 类 号：TQ413.29[化学工程]