摘要
氧化安定性是基础油的重要性能,对3种环烷基油烃组成与氧化安定性的相关性进行了研究。用气相色谱-质谱(GC-MS)对3种环烷基油的烃组成进行了分析,其饱和烃的含量依次为66.4%,87.5%和99.2%,双环芳香烃和稠环芳香烃总含量依次为25.8%,3.4%和0%,单环芳香烃的含量次为7.6%,8.7%和0%。用旋转氧弹法对3种环烷基油的氧化安定性进行了评价,其对应的氧化诱导期依次为78 min,43 min和52 min。加入0.3%的2,6—二叔丁基对甲酚抗氧剂(T501)后,3种环烷基油的氧化诱导期依次为124 min,130 min和210 min,相应提高了59.0%,202.3%和303.8%。说明环烷基油中的双环芳香烃和稠环芳香烃总含量越高,其氧化安定性越好。单环芳香烃的含量越高,氧化安定性越差。饱和烃含量越高,对抗氧剂的感受性越好。环烷基油的氧化诱导期随抗氧剂的增加而增加,抗氧剂的最佳添加量为0.3%。
Oxidation stability was an important performance of base Stocks.The correlation between the hydrocarbons composition of three naphthenic Stocks and oxidation stability was studied.The hydrocarbons composition of three naphthenic Stocks were analyzed by gas chromatography-mass spectrometry(GC-MS).The content of saturated hydrocarbons was 66.4%,87.5%and 99.2%,the total content of bicyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons was 25.8%,3.4%and 0%,the content of monocyclic aromatic hydrocarbons was 7.6%,8.7%and 0%.The oxidation stability of three kinds of naphthenic Stocks was evaluated by the rotating pressure vessel method.The corresponding oxidative induction time were 78 min,43 min and 52 min respectively.After adding 0.3%2,6-di-tert-butyl-p-cresol antioxidant(T501),the oxidation induction time of the three naphthenic Stocks were 124 min,130 min and 210 min respectively,which increased 59.0%,202.3%and 303.8%respectively.It showed that the higher the total content of bicycloaromatics and polycyclic aromatic hydrocarbons in naphthenic Stocks was,the better the oxidation stability was.The higher the content of monocyclic aromatic hydrocarbon was,the worse the oxidation stability was.The higher the content of saturated hydrocarbons was,the better the susceptibility of antioxidant was.The oxidation induction time of naphthenic Stocks increased with the increase of antioxidant,and the optimal amount of antioxidant was 0.3%.
作者
张守杰
Zhang Shoujie(PetroChina Lanzhou Lubricating Oil R&D Institute,Karamay 834003,China)
出处
《合成润滑材料》
CAS
2020年第2期15-17,共3页
Synthetic Lubricants
关键词
旋转氧弹法
氧化诱导期
感受性
芳香烃
饱和烃
rotating pressure vessel method
oxidative induction time
susceptibility
aromatic hydrocarbons
saturated hydrocarbons
