从铋冶炼浸渣制取三碱式硫酸铅的工艺研究 --硝酸浸出-流酸沉铅工艺的影响

通过对铋冶炼浸渣采用碳酸氢铵转化法合成三碱式硫酸铅的工艺研究,得出在硝酸浸出-硫酸沉铅工艺过程中影响铅回收率的主要因素为硝酸质量浓度.通过正交实验得出最佳的工艺参数为:硝酸质量分数为15%,沉铅温度为40℃,n(H2SO4):n(Pb)为1.2:1,沉铅时间为2.0 h,硝酸浸渣时间为1.5 h,硫酸质量分数为40%,n(HNO3):n(Pb)为3:1.此时,铅的回收率可达到99.25%,浸渣率为3%.     

磁性Fe3O4纳米粒子用作靶向药物载体的制备及分析

Fe3O4 magnetic nanoparticles were prepared by the aqueous co-precipitation of FeCl3-6H2O and FeCl2-4H2O with addition of ammonium hydroxide. The conditions for the preparation of Fe3O4 magnetic nanoparticles were optimized, and Fe3O4 magnetic nanoparticles obtained were characterized systematically by means of transmission electron microscope （TEM）, dynamic laser scattering analyzer （DLS） and X-ray diffraction （XRD）. The results revealed that the magnetic nanoparticles were cubic shaped and dispersive, with narrow size distribution and average diameter of 11.4 nm. It was found that the homogeneous variation of pH value in the solution via the control on the dropping rate of aqueous ammonia played a critical role in size distribution. The magnetic response of the product in the magnetic field was also analyzed and evaluated carefully. A 32.6 mT magnetic field which is produced by four ferromagnets was found to be sufficient to excite the dipole moments of 0.05 g Fe3O4 powder 2 cm far away from the ferromagnets. In conclusion, the Fe3O4 magnetic nanoparticles with excellent properties were competent for the magnetic carders of targeted-drug in future application.     

DMF—甲苯二元系的等温汽液平衡

利用改进的Ｒｏｓｅ 釜结合等温等压控制装置,测定了８０－０７ ℃和１００－００ ℃下ＤＭＦ－ 甲苯二元系的等温汽液相平衡数据－ 实验数据通过了热力学一致性检验,用Ｗｉｌｓｏｎ 方程关联,获得较满意的结果     

四氯化碳—1,1,2—三氯乙烷的汽液平衡

用泵式沸点仪测定了常压下四氯化碳１－１,２－三氯乙烷在不同液相组成的沸点,并用间接法由ＴＰＸ推算了与之平衡的汽相组成。用最小二乘法求出了该系统的液相活度系数模型参数,由模型参数推算的泡点与实验值能很好的吻合。     

废ABS电镀件退镀液中铜的回收工艺研究

采用盐酸和双氧水构建的溶液对废ABS塑料电镀件进行退镀,退镀液中含铜、镍等金属,采用电解法回收退镀液中的铜。通过单因素及正交试验法,考察了电流密度、电解液循环流量、电极距、电解时间等工艺条件对电流效率及铜回收率的影响,确定了铜回收过程的最佳工艺参数:电流密度416.0 A/m2、电极距1.4 cm、溶液循环流量3.0 L/h、电解时间40 min。更多还原     

汽液相平衡研究进展

概述了近年来汽液相平衡的测定方法:直接法(蒸馏法、静态法、流动法、循环法、泡露点法),间接法(饱和蒸汽压法、沸点仪法)和汽液相平衡计算方法(状态方程法和基团贡献法)的研究现状及其发展趋势,对其进一步的研究做了展望。     

不溶性硫磺的研究进展

阐述了不溶性硫磺(IS)的形成机理I、S生产的各种主要方法以及产品的充油处理、稳定性、环保及用途等,并指出高含量、高温稳定性、高分散性、低静电是IS产品未来的发展方向。     

丝光沸石用作甲胺化反应催化剂的研究——涂渍液A涂渍铈改性丝光沸石

研究了涂渍液Ａ涂渍于铈改性丝光沸石催化剂对常压固定床上甲胺化反应的影响;考察了不同涂渍条件（涂渍时间、涂渍温度及涂渍液浓度）下催化剂的活性及选择性,筛选出一较佳的制备条件,所制催化剂的二甲胺选择性达９８７％     

甲基二氯硅烷-甲基乙烯基二氯硅烷-甲苯三元体系等压汽液平衡

Vapor-liquid euilibrium (VLE) for a ternary system of Methyldichlorosilane methylvinyldichlorosilane toluene and constituent binary systems were measured at 101.3kPa using a new type of magnetical pump-ebulliometer,The equilibrium conpositions of the vapor phase of binary systems were calculated indirectly from the total pressure-temperature-liquid composition(pTx).The experimental data were correlated with the Wilson and NRTL(non-random two liquid )equations.The parameters of the Wilson moldel were employed to predict the ternary VLE data .The calculated boiling points were in good agreement with the experimental ones.