吡虫啉废水资源化回收利用的实验研究  

Experimental study on recycling and utilization of imidacloprid wastewater

作　　者：申高忠 王怡明 仲恩奎 杜可心 高秋敏 SHEN Gaozhong;WANG Yiming;ZHONG Enkui;DU Kexin;GAO Qiumin(Jiangsu Ruixiang Chemical Co.,Ltd.,Yangzhou Jiangsu 225000,China)

机构地区：[1]江苏瑞祥化工有限公司,江苏扬州225000

出　　处：《石油化工应用》2024年第11期104-108,共5页Petrochemical Industry Application

摘　　要：取吡虫啉淡盐废水,经电渗析预处理后负压蒸馏,所得釜残物以乙醇为溶剂,乙醇加入量与釜残质量比为1.0,溶解温度65℃,保温时间1 h,采用分段结晶的方式经水洗、烘干后,咪唑烷回收率>95.00%,回收咪唑烷含量>97.00%,实验过程中所得N,N-二甲基甲酰胺、工艺废水循环套用,实现吡虫啉工艺废水零排放。考虑反应过程中酒精母液回收的安全性,开展了乙醇母液脱溶塔釜物料热稳定性测试,报告显示,乙醇母液脱溶塔釜物料具有热不稳定性,热分解最大反应速率到达时间为8 h对应的温度TD8为116℃,TD24为97℃。乙醇母液在90℃水浴加热下进行蒸馏回收,乙醇回收率>95%。Imidacloprid low-salt wastewater was taken from production,pretreated by electrodialysis,and distilled under negative pressure,ethanol was used to dissolve the kettle residual in a mass ratio of 1.0 at 65℃for 1 h.After solution crystallized by step cooling,washed and dried,the recovery rate of N-Nitroiminoimidazolidine was over 95.00%and the recovered N-Nitroiminoimidazolidine over 97.00%.The N,N-dimethylformamide and wastewater recycling can discharge zero waste.Considering the safety of alcohol mother liquor recovery during the reaction process,a thermal stability test was conduceted for the ethanol mother liquor dedissolving tower reactor material.The report showed that the ethanol mother liquor dedissolving tower reactor material had thermal instability,and the maximum reaction rate of thermal decomposition was 8 h.The corresponding temperature TD8 was 116℃and TD24 was 97℃.The alcohol mother liquor was recovered by distillation under 90℃water bath,and the ethanol recovery rate was over 95%.

关 键 词：吡虫啉 废水 咪唑烷 零排放 热稳定性 

分 类 号：X703.1[环境科学与工程—环境工程]