一些无机盐对甲烷的液相选择催化氧化

SELECTIVE OXIDATION OF METHANE BY SOME INORGANIC SALTS IN LIQUID PHASE

考察了无机盐Ｃｒ２（ＳＯ４）３，ＣｄＳＯ４，ＦｅＳＯ４，ＶＯＳＯ４，Ｃｅ（ＳＯ４）２，ＭｎＳＯ４，ＳｎＣｌ４和ＨｇＳＯ４在浓硫酸介质中对甲烷的催化活性，发现ＭｎＳＯ４，ＳｎＣｌ４和ＨｇＳＯ４对甲烷氧化有活性．在此基础上考察了ＨｇＳＯ４体系中气液体积比，温度，浓度，反应时间以及硫酸浓度对反应活性的影响．认为反应按亲电取代反应机理进行．

Some inorganic salts, such as Cr 2(SO 4) 3, CdSO 4, FeSO 4, VOSO 4, Ce(SO 4) 2, MnSO 4, SnCl 4 and HgSO 4, were used to selectively oxidize methane to monomethyl sulfate in concentrated sulfuric acid. MnSO 4, SnCl 4 and HgSO 4 are active for oxidation of methane. Among them, the best result was given by HgSO 4/H 2SO 4 system, i.e. , conversion 37 3%, selectivity 80 9%, and yield 30 2%, respectively. Based upon those data, the influence of other factors were investigated. An electrophilic displacement reaction mechanism was suggested.