对氯苯氧醋酸钠的合成  

Synthesis of p-chlorophenoxyacetic sodium

作　　者：张宪成[1] 刘晓忠[2] 

机构地区：[1]大庆石油化工总厂塑料厂,黑龙江大庆163714 [2]大连理工大学化工学院,辽宁大连116012

出　　处：《应用化工》2001年第5期34-36,共3页Applied Chemical Industry

摘　　要：采用一步法由氯乙酸与对氯苯酚在氢氧化钠质量分数为 0 2的水溶液中的反应制得。对原料配比、反应温度、反应时间和溶液pH值等各种反应条件的影响作了详细研究。氯乙酸∶对氯苯酚 (摩尔比 )为 1 2 5 ,质量分数为 0 2的氢氧化钠溶液中 ,pH值在 5～ 7之间 ,温度在 10 4℃左右为宜 ,反应时间为 2 0min ,PCPA收率为 90 3%。同文献报道的方法相比 ,此法有利于工业上的大量制备 。p chlorophenoxyacetic sodium (PCPA) was synthesized by p chlorophenol with 2 chloroacetic acid in the 20% (mass) hydroxide sodium aqueous solution.Effects of ratio of p chlorophenol to 2 chloroacetic acid,reaction temperature,reaction time and pH value on the reaction were studied.When the molar ratio of 2 chloroacetic acid∶ p chlorophenol is 1.25 and pH=5～7 at 104 ℃ reaction for 20 min in the 20% (mass) NaOH solation,the yield of PCPA can be reached 90%.Compared with those reported in literature,the method can be more available in industrial application with lower cost.

关 键 词：对氯苯氧醋酸钠 氯乙酸 对氯苯酚 PCPA 植物生长调节剂 

分 类 号：TQ452[化学工程—农药化工]