简介:以研究二烷基二硫代氨基甲酸钼产品的组成结构出发,采用液质联用仪分析了溶解性存在差异的两个样品。寻找到了影响有机钼在润滑油中溶解性的两个主要原因:一是溶解性优异的样品中存在链长更长的碳十三有机钼,并通过液相色谱获得了不同链长有机钼的组成;二是二烷基二硫代氨基甲酸钼中的硫桥被氧桥所取代,导致了分子的极性增大,油溶性变差。
简介:TheapplicationofXzeoliteintheareasforproducingpara-xylenebyadsorptiveseparation,N2/O2separation,etc.,wasreviewed,andtheframeworkSiO2/Al2O3molarratio,thecationsandthewatercontentofXzeolitesignificantlyaffecteditsselectivityandcapacity.Astheactivecomponentofpara-xyleneadsorbent,theXzeolitewithaframeworkSiO2/Al2O3molarratioof2.2-2.4coupledwithcationsofBa^2+andK^+,aswellasawatercontentof4.0%-5.0%exhibitedhigherpara-xyleneselectivity.ForN2/O2separation,higherN2capacityandN2/O2separationfactorwereachievedwhentheXzeolitehadaframeworkSiO2/Al2O3molarratioof2.0coupledwithLi^+cations.TheintroductionofanothercationinXzeolitecouldfurtherincreasetheN2/O2separationfactor,whiletheadsorptionofwater,however,couldleadtoaremarkabledecreaseofN2capacity.Besides,theXzeolitecouldbeusedinadsorptiveseparationofhighlypureHeandselectiveadsorptionofCO2,CO,CH4,N2,Ar,andH2.