【摘要】 分别选用喹啉、吲哚、甲基苄基硫醚及二苯并噻吩作为润滑油基础油中碱性氮、非碱性氮、硫醚类及噻吩类模型化合物 ,以饱和烃为主的白油作为润滑油基础油的替代物 ,研究这些杂原子化合物对润滑油基础油氧化性能的影响。为了模拟润滑油实际使用情况 ,同时考察了金属铜和环烷酸铜在与硫、氮化合物共存时对润滑油基础油氧化的催化作用。研究表明 ,金属铜强化了喹啉对白油的氧化催化作用 ;环烷酸铜由于与喹啉之间存在络合效应 ,抑制了喹啉对白油的氧化催化作用。吲哚加入量大于 5 0 0 μg/ g时 ,能抑制白油氧化 ,在环烷酸铜存在时 ,抑制作用更为突出 ;而有金属铜存在时 ,吲哚则没有抑制氧化作用。当二苯并噻吩加入量为 2 0 0 μg/ g左右 ,且与金属铜共存时 ,能抑制白油氧化 ,而与环烷酸铜共存时 ,则完全没有抑制氧化的作用。以金属铜或环烷酸铜为催化剂时 ,甲基苄基硫醚对白油均表现了很强的抑制氧化能力。更多还原

【Abstract】 To study the influence of nitrogen and sulfur compounds on oxidation of lube base oil,quinoline,indole,benzyl methyl sulfide(BMS)and dibenzothiophene(DBTH)were selected as the model compounds of basic nitrogen,non basic nitrogen,sulfide and thiophene in lube base oil,respectivily. And the lube base oil was also replaced by white oil.For simulating actual status of lubricant oil in use,the catalytic action of copper and copper naphthenate was investigated when they coexist with nitrogen or sulfur compounds.Experimental results indicated that the presence of copper could strengthen the catalytic ability of quinoline on white oil oxidation. With the complex effects between quinoline and copper naphthenate,the accelerating oxidation of quinoline to white oil can be inhibited.Indole can also inhibit white oil oxidation when its content in white oil is greater than 500 μg/g. And the inhibition was more outstanding with the presence of copper naphthenate,but it was not observed when copper coexisted with indole.The oxidation inhibition of DBTH can be observed only when sulfur content is around 200 μg/g with the presence of copper.Coexisting with copper naphthenate,DBTH showed no oxidation inhibition.BMS has good oxidation inhibition in the presence of either copper or copper naphthenate.更多还原