摘要
利用五氟苄基溴对硫铁化合物氧化历程中出现的多聚硫(Sn2-)进行烷基化,通过GC-MS可快捷、有效地对烷基化后的各种多聚硫Sn2-(n=1,2,3)及元素硫进行了分离与鉴定。实验证实新制备的焦硫化铁氧化时有Sn2-生成。其氧化产生Sn2-的速率远大于磁黄铁矿、黄铁矿氧化产生Sn2-速率。磁黄铁矿氧化时Sn2-产生速率大于黄铁矿。焦硫化铁、磁黄铁矿、黄铁矿氧化历程中均依次出现S2-、S22-、S32-三种相对稳定的多聚硫,随后出现S8。硫铁化合物氧化历程中还原硫物质的分离与表征将有利于由硫铁矿氧化而引发的硫铁矿矿山及含硫煤自燃、石油设备自燃、酸性矿山废水等成因机理研究的深入展开。
In the oxidation process of ferro sulphide compounds, the highly active products are polysulphides （Sn^2- ）. the thesis gives a sensitive and simple method to determine the polysulphides and sulfur. Polysulphides are alkylated with pentafluorobenzyl bromide, by conversion into stable bis（pentafluorobenzyl） -monosulphide, - disulphide, - trisulphide, then are detected by gas chromatography - mass spectrometry（GC- MS）. The ferro sulphide compounds including pyrite, pyrrhotite and iron sulphide. The oxidation rate of iron sulphide is much rapider than that of pyrite and pyrrhotite, Then the pyrrhotite is rapider than pyrite. Separation and characterization of polysulfide can give a method to further study the mechanism of acid mine drainage and spontaneous combustion on coal mine, crude coil.
出处
《矿冶》
CAS
2009年第1期96-99,105,共5页
Mining And Metallurgy
基金
科技部社会公益项目(No.2005DIB2J222)资助
关键词
硫铁矿
多聚硫
硫铁化合物
氧化
pyrite ore
polysulfide
ferro sulphide compound
oxidation
