利用六羟甲基三聚氰胺生产废水制备脲醛缓释肥
Preparation of urea-formaldehyde slow-release fertilizer with wastewater of hexamethylol melamine
万俊伟 1王嘉乐 2纪利俊1
作者信息
- 1. 华东理工大学 化工学院,上海 200237;上海烟草集团烟草行业卷烟烟气重点实验室,上海 200082
- 2. 上海烟草集团烟草行业卷烟烟气重点实验室,上海 200082
- 折叠
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.
Abstract
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 condi-tions,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.
关键词
六羟甲基三聚氰胺/甲醛/脲醛缓释肥/响应曲面法Key words
hexamethylol melamine/formaldehyde/urea-formaldehyde slow-release fertilizer/response surface methodology引用本文复制引用
基金项目
中央财政拨款上海烟草集团开放研究基金(K2021-1-014P)
出版年
2024
NETL
NSTL
万方数据