Optimization of Reaction Conditions for Formaldehyde Treatment of Semi-coking Wastewater
王亚俐 1柏旭波 1孙娟娟1
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作者信息
1. 榆林学院化学与化工学院, 榆林 719000
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摘要
利用甲醛将兰炭废水中的酚类物质转化为酚醛树脂,以便资源化利用兰炭废水.通过测定酚醛树脂生成过程中挥发酚、COD、氨氮和油的含量,调控反应时间、温度以及原料比例,确定制备酚醛树脂的最优反应条件.同时,应用 X 射线晶体衍射(XRD)和扫描电子显微镜(SEM)等表征技术对生成的酚醛树脂进行理化分析.研究结果显示,甲醛法处理兰炭废水制备酚醛树脂的最佳条件为反应温度=90ºC,反应时间=4 h,甲醛与兰炭废水的体积比=1:40.
Abstract
Phenolic substances in semi-coking wastewater were converted into phenolic resin by formaldehyde,therefore the resources were utilized.Volatile phenol,COD,ammonia nitrogen and oil in semi-coking wastewater before and after phenolic resin formation were detected to optimize the reaction time,temperature and raw mate-rial ratio,eventually the optimal reaction conditions for phenolic resin preparation were determined.Meanwhile,the physicochemical analysis of phenolic resin materials was carried out by XRD and SEM.The results showed that a volume ratio of 1:40(formaldehyde vs.semi-coking wastewater),a reaction temperature of 90ºC,and a reaction time of 4 hours were the optimum reaction conditions for semi-coking wastewater treated by formaldehyde.
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