以1,1,2-三氯乙烷为原料与氢氧化钠溶液反应,生成偏二氯乙烯,偏二氯乙烯在混酸(硝酸与盐酸)的作用下,生成1,1-二氯-2-硝基乙烯,考察了温度,时同,三氯乙烷和氢氧化钠的用量比,偏二氯乙烯与混酸的用量比等对于反应产物的影响,得到了优化的反应条件为:1)反应温度60-70℃,反应时间1.5-2.0 h,n(三氯乙烷):n(氢氧化钠)=1:1.15,此时偏二氯乙烯的收率99%。

　　浩瀚色谱（山东）应用技术开发有限公司研发氢火焰离子化检测器(FID)测定烯啶虫胺合成中间体中1,1-二氯-2-硝基乙烯含量的气相色谱方法。此方法灵敏、准确,可以应用于实际样品1,1-二氯-2硝基乙烯的测定。

　　名称:毛细管柱

　　固定相:专用

　　规格:30m*0.32mm*0.5um

　　型号:HH-CLNO2

　　温度:240°C

　　Using 1,1,2-trichloroethane as the raw material, it reacts with sodium hydroxide solution to generate vinylidene chloride. Under the action of mixed acids (nitric acid and hydrochloric acid), vinylidene chloride generates 1,1-dichloro-2-nitroethylene. The effects of temperature, time, the ratio of trichloroethane to sodium hydroxide, and the ratio of vinylidene chloride to mixed acids on the reaction products were investigated. The optimized reaction conditions were as follows: 1) reaction temperature 60-70 ℃, reaction time 1.5-2.0 hours, N (trichloroethane): n (sodium hydroxide)=1:1.15, at which point the yield of vinylidene chloride is 99%.

　　Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed a gas chromatography method for determining the content of 1,1-dichloro-2-nitroethylene in the intermediate of the synthesis of imidacloprid using a hydrogen flame ionization detector (FID). This method is sensitive and accurate, and can be applied to the determination of 1,1-dichloro-2-nitroethylene in actual samples.

　　Name: Capillary Column

　　Fixed phase: dedicated

　　Specification: 30m * 0.32mm * 0.5um

　　Model: HH-CLNO2

　　Temperature: 240 ° C