氧化破胶剂过硫酸钾的安全性

Safety of oxidation breaker potassium persulfate

为确保氧化破胶剂在储存、运输中的安全稳定,需要测试氧化破胶剂的氧化性能,并进行安全化处理。根据联合国《关于危险货物运输的建议书——试验标准手册》第二部分中的试验方法并结合实际情况,本文选用过硫酸钾(K2S2O8)为主要原料,同时添加其他4种稳定剂形成混合体系,采用差示扫描量热分析仪(DSC)和热重分析仪(TGA),分别对单独组分和混合体系进行测试,评估氧化性物质过硫酸钾的热稳定性。结果表明,Na Cl、KCl、羟甲基纤维素钠(CMC)等无机盐类不能有效改善K2S2O8的热稳定性。而惰性物料炭黑可有效改善K2S2O8的热稳定性,最佳添加量为2.5份。

In order to ensure the safety and stability of oxidation breakers,it is necessary to test the oxidizing properties of the oxidation breakers. Based on the second part of ＂Recommendations on the transport of dangerous goods manual of tests and criteria＂ and real situations,potassium persulfate（K2S2O8）was selected as the main raw material and blended with another four kinds of stabilizer. The thermal stability of K2S2O8 and mixed components was characterized by differential scanning calorimetry analyzer（DSC）and thermal gravimetric analyzer（TGA）. The results showed that carbon black can improve the thermal stability of K2S2O8 significantly and the optimal content was above 2.5%. Moreover,inorganic salts,such as Na Cl,KCl,hydroxymethyl cellulose sodium（CMC）,can not improve thermal stability effectively.