摘要
利用六羟甲基三聚氰胺(HMM)生产中含甲醛的废水制备脲醛缓释肥,考察反应U/F摩尔比、温度和pH对制备反应的影响。结果表明,HMM废水制备脲醛缓释肥的优化条件为:U/F=1.80,亚甲基化反应温度49.8℃,羟甲基化反应pH=7.7。在优化条件下,HMM生产废水的甲醛转化率可达99.1%,制备的脲醛缓释肥尿素氮含量为4.2%,总氮含量为36.7%,AI值45.3%,均满足GB/T 34763—2017的要求。
Urea formaldehyde slow-release fertilizer was prepared from wastewater containing formaldehyde in the production of hexamethylene-melamine(HMM).The effects of U/F reaction molar ratio,temperature and pH on the preparation of the reaction were investigated.The results showed that the optimal conditions for preparing urea formaldehyde slow-release fertilizer from HMM wastewater were as follows:U/F=1.80,methylene reaction temperature 49.8℃,and hydroxymethylation reaction pH=7.7.Under optimal conditions,the formaldehyde conversion rate of HMM production wastewater can reach 99.1%,the urea nitrogen content of prepared urea formaldehyde slow-release fertilizer is 4.2%,the total nitrogen content is 36.7%,and the AI value is 45.3%,all of which meet the requirements of GB/T 34763—2017.
作者
万俊伟
王嘉乐
纪利俊
WAN Jun-wei;WANG Jia-le;JI Li-jun(School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;Key Laboratory of Cigarette Smoke for Tobacco Industry,Shanghai Tobacco Group,Shanghai 200082,China)
出处
《应用化工》
CAS
CSCD
北大核心
2024年第3期516-519,524,共5页
Applied Chemical Industry
基金
中央财政拨款上海烟草集团开放研究基金项目(K2021-1-014P)。
关键词
六羟甲基三聚氰胺
甲醛
脲醛缓释肥
响应曲面法
hexamethylol melamine
formaldehyde
urea-formaldehyde slow-release fertilizer
response surface methodology
作者简介
万俊伟(1997-),男,福建三明人,硕士研究生,师从纪利俊副教授,从事传质与分离研究。电话:19821932914,E-mail:wjw-leo@foxmail.com;通信作者:纪利俊(1972-),男,副教授,从事传质与分离的研究。E-mail:jilijun@ecust.edu.cn。
