摘要
[目的]为草甘膦的母液处理及催化剂分离提供新方法。[方法]以活性炭空气氧化法制备草甘膦,对其母液的套用进行评价。[结果]母液中甲酸、甲醛含量逐步累积,至一定程度时突然下降,草甘膦含量逐渐增大,原粉析出率随氧化次数增加而降低。DSC显示,草甘膦晶体熔点为226.6℃,TGA显示草甘膦在205.2℃开始分解,当草甘膦晶体完全熔融时,草甘膦分解率仅为3.45%。[结论]草甘膦及催化剂的本体热熔分离具有较高可行性。
[Aims] The aims were to provide new method for glyphosate solvent treatment and catalyst separation. [Methods] Glyphosate was prepared by air oxidation method with activated carbon as catalyst, and the recycle of solvent was evaluated. [Results] The results indicated that the concentrations of formic acid and formaldehyde accumulate gradually, when the concentrations rose to a certain degree, they showing a sudden downward. In addition, with the rising of oxidation times, the concentration of glyphosate in the solvent increased, and the yield of powder decreased. The DSC patterns showed that the melt point of glyphosate crystal is 226.6℃. The TGA patterns exhibited that the beginning temperature of glyphosate degradation is 205.2 ℃, when glyphosate crystal fused completely, its degradation rate is only 3.45%. [Conclusions] The bulk melt separation for glyphosate and catalyst has a high feasibility.
出处
《农药》
CAS
CSCD
北大核心
2015年第9期642-644,共3页
Agrochemicals
关键词
草甘膦
母液套用
热学性能
催化剂分离
glyphosate
solvent recycle
thermal properties
catalyst separation
