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    • 5. 发明申请
    • PROCESS FOR PREPARING METHYLENE BIS-(DIALKYLAMINO-DITHIOFORMATE) IN ONE STEP
    • 在一步中制备甲基双 - (二氨基亚氨基二取代基)的方法
    • US20140371483A1
    • 2014-12-18
    • US14307849
    • 2014-06-18
    • CHINA PETROLEUM & CHEMICAL CORPORATIONRESEARCH INSTITUTE OF NANJING CHEMICAL INDUSTRIAL GROUP
    • Zhiyong HEWei HuangWeiwei KongLei RenJunyan Ping
    • C07C333/20
    • C07C333/20
    • A process for preparing methylene bis-(dialkylamino-dithioformate) in one step includes: simultaneously feeding all or part of four raw materials: dialkylamine, an aqueous solution of sodium hydroxide, dichloromethane and carbon disulfide through a constant-flow pump into a continuous flow reactor; performing the reactions in the continuous flow reactor under a temperature of 10 to 100° C. and with a residence time of 10 to 100 s; simply separating of the obtained reaction products to give the final product. The process synthesizes the product in one step by using the continuous flow reactor. The rapid mass transfer and heat transfer in the continuous flow reactor promote the main reaction, reduce side reactions, improve the product color, and shorten the operation time. Moreover, the yield is relatively high and the quality of the final product meets the requirements.
    • 在一个步骤中制备亚甲基双 - (二烷基氨基 - 二硫代甲酸酯)的方法包括:通过恒流泵同时进料四种原料的全部或部分:二烷基胺,氢氧化钠的水溶液,二氯甲烷和二硫化碳进入连续流 反应堆; 在连续流动反应器中在10〜100℃的温度下进行反应,停留时间为10〜100秒; 简单地分离得到的反应产物得到最终产物。 该方法通过使用连续流动反应器在一个步骤中合成产物。 连续流动反应器中的快速传质和传热促进了主要反应,减少副反应,提高了产品颜色,缩短了操作时间。 此外,产量相对较高,最终产品的质量符合要求。