从蓖麻油制取10-羟基癸酸的研究

本文报道了从蓖麻油制取10-羟基癸酸的研究,发现了从蓖麻油制取10-羟基癸酸的新的工艺路线和最佳的工艺条件,用氢氧化钠用量、2-辛醇量、反应时间和反应温度四因子三水平L_9(3~4)进行了正交试验,发现最佳工艺条件是:氢氧化钠(g)/蓖麻油(g):1.25:2-辛醇量(g)/蓖麻油(g):2:反应时间:6h;反应温度:180℃。在这一新的工艺路线和最佳工艺条件下,10-羟基癸酸产率可达75％。     

Decomposition of Transformer Oil Under Ultrasonic Irradiation During Degassing Process

In the degassing process of transformer oil with ultrasonic waves ,decompostition of the oil was observed.Light hydrocarbons,including methane,ethane,ethylene ,aceylene,propane etc,were found to be released continuously from the oil into headspace within a closed vial placed in an ultrasonic field ,The gases came from decomposition of hydrocarbon molecules under cavitation effect.     

无水醋酸镍与水杨醛肟固相配位反应的热化学研究

用新型的具有恒定温度环境的反应热量计，以６ｍｏｌ·ｄｍ－３ＨＣｌ溶液为量热溶剂，分别测定了ＨＳＡＯ，Ｎｉ（Ａｃ）２和Ｎｉ（ＳＡＯ）２，ＨＡｃ先后溶于该溶剂的溶解焓．设计了一个新的热化学循环，计算得到该配位反应的反应焓ΔｒＨ＝－８６．０７５ｋＪ·ｍｏｌ－１，并估算出了ΔｆＨ［Ｎｉ（ＳＡＯ）２，２９８Ｋ］＝－４０１．３３６ｋＪ·ｍｏｌ－１．     

镨掺杂Bi2Sr3Co2O9+δ电子结构的XPS研究

研究了Pr掺杂Bi2Sr3Co2O9+δ体系的X射线光电子能谱,发现随着体系中Pr掺杂量的增大,内层电子结合能有缓慢增大的趋势,但掺杂量达到0.6时,测得的电子结合能减少0.4 eV左右,与分析材料中费米能级变化引起的结合能变化趋势相反.考虑到掺杂量达到0.6时,材料发生金属-绝缘体转变,所得到的表观结合能减少可能是绝缘体样品相对于样品底座存在正的电势差所引起的.     

Phase Diagram and Properties of Glasses of the System Sb<Subscript>2</Subscript>S<Subscript>3</Subscript>-AgI

The phase diagram of the system Sb₂S₃-AgI was constructed from data of the differential thermal and X-ray phase analyses. The physicochemical properties of glassy and crystalline alloys were studied.