【摘要】 采用元素分析和傅里叶变换离子回旋共振质谱(FT-ICR MS)对润滑油基础油光照产生的沉淀物进行了分析,并通过在光安定性较好的基础油中分别加入一定量的喹啉、吲哚和二苯并噻吩,考察了含氮与含硫化合物对润滑油基础油光安定性的影响。结果表明:沉淀物中硫、氮含量是光照前油品中硫、氮含量的2 000倍以上,沉淀物主要由高度缩合的含氮、含氧化合物组成;含氮化合物对润滑油基础油的光安定性的影响十分显著,尤其是非碱性含氮化合物的影响远大于碱性含氮化合物;噻吩类含硫化合物对润滑油基础油光安定性的影响较小,且噻吩类含硫化合物的含量较低时可使润滑油基础油的光安定性变差,而噻吩类含硫化合物的含量较高时可以延缓润滑油基础油的光安定性变差。更多还原

【Abstract】 The sediments deposited from lube base oil were analyzed by means of elemental analysis and FT-ICR MS,and the model system was constructed to study the influence of nitrogen and sulfur compounds on the light stability of lube base oil by the addition of quinoline,indole and dibenzothiophene in blank sample.The results showed that the content of sulfur and nitrogen in sediments was 2 000 times more than that in the lube base oil,and the sediment was mainly composed of high condensated nitrogen and oxygen compounds.Nitrogen compounds on the light stability of lube base oil was very significant,and the influence of non-basic nitrogen compounds was far greater than the influence of basic nitrogen compounds.Thiophene sulfur compounds had small influence on the light stability of lube base oil,and low content of thiophenic sulfur compounds made the light stability of lube base oil worse,while high content of thiophenic sulfur compounds could inhibit the light stability of lube base oil deterioration.更多还原