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Green oxidation of cyclohexene using dioxygen as oxidizing agent is highly desirable because of its environmental compatibility and economic impact. Separation of its oxidation products depends on the reliable vapor- liquid equilibrium (VLE) data of relevant components, which are still lacking. The VLE data of binary system 1,2-epoxycyclohexane and 2-cyclohexen-1-one under ambient pressure were obtained using an improved VLE equipment EC-2 still in this work. The results showed that this binary system has no azeotropic point. Furthermore, the experimental VLE data were correlated with the Wilson thermodynamic model and the corresponding binary interaction parameters of the model were obtained. The results showed that the VLE data agreed well with the model and passed the thermodynamic consistency test of Herrington. 相似文献
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针对现行的支链醇生物柴油合成工艺中产品收率低,工艺复杂等问题,提出在不使用任何催化剂的条件下,以油酸为原料,经酰氯化和醇解两步反应合成支链醇生物柴油的新工艺。研究得到合成油酸异丙酯的较佳工艺条件为:反应温度30℃,油酸、氯化亚砜与异丙醇的摩尔比为:1:1.3:1.3,反应时间为2.5 h。合成油酸叔丁酯的较佳工艺条件为:反应温度60℃,油酸、氯化亚砜与叔丁醇的摩尔比为:1:1.4:1.4,反应时间为2.5 h。在较佳工艺条件下,油酸异丙酯和油酸叔丁酯的酯化率可分别达到97.31%和55.18%;其凝点和冷滤点分别为25℃、23℃和14℃、11℃,两种生物柴油均具有良好的低温性能。 相似文献
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常压下环己烯-环氧环己烷二元汽液平衡数据的测定和关联 总被引:2,自引:2,他引:0
用分子氧对环己烯直接进行环氧化涉及到的内容之一是环己烯与环氧环己烷的分离.为了为二者的分离提供基础物性数据,采用了改进的EC-2型汽液平衡釜测定了常压下(101.33kPa)环己烯(1)-环氧环己烷(2)二元体系的汽液平衡数据,所得结果经检验符合热力学一致性.用Wilson方程对所测的汽液平衡数据进行了关联,求出了Wilson方程交互作用参数,并对汽液平衡的计算值与实验值进行了比较,发现二者偏差较小,可以满足工程上环己烯、环氧环己烷分离设计的需要. 相似文献
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