钛酸钾晶须及滑石粉复合增强聚丙烯

采用钛酸钾晶须和滑石粉协同增强聚丙烯,并添加POE作为增韧剂研究聚丙烯复合材料的性能.实验发现:钛酸钾晶须对聚丙烯有很好的增强增韧效果,采用PP-g-MA做增容剂和表面处理过的晶须,具有更好的实验效果.聚丙烯复合材料的拉伸模量和弯曲模量均随钛酸钾晶须含量增加而显著上升.此外,加入滑石粉在不大幅度降低聚丙烯拉伸强度的同时,提高聚丙烯的耐热性,进一步改善体系的流动性,降低成本.     

微波辐射Fenton试剂处理醇酮废水的研究

采用微波辐射Fenton试剂处理醇酮废水,分别考察了双氧水用量、微波辐射时间、微波辐射功率和pH等因素对醇酮废水处理效果的影响.确定在微波功率为480 W、微波辐射时间5 min、双氧水(质量分数6%)用量为2.5 mL、FeSO_4用量为0.07 g和pH=1的条件下,处理50 mL醇酮废水效果最佳,其COD去除率达到97.86%.结果表明,微波辐射Fenton试剂处理该废水效果明显,不会对环境造成二次污染.     

Emulation of gas‐liquid flow in packed beds for offshore floating applications using a swell simulation hexapod

A laboratory‐scale packed column was positioned on a six degree of freedom swell simulation hexapod to emulate the hydrodynamics of packed bed scrubbers/reactors onboard offshore floating systems. The bed was instrumented with wire mesh capacitance sensors to measure liquid saturation and velocity fields, flow regime transition, liquid maldistribution, and tracer radial and axial dispersion patterns while robot was subject to sinusoidal translation (sway, heave) and rotation (roll, roll + pitch, yaw) motions at different frequencies. Three metrics were defined to analyze the deviations induced by the various column motions, namely, coefficient of variation and degree of uniformity for liquid saturation fluctuating fields, and effective Péclet number. Nontilting oscillations led to frequency‐independent maldistribution while tilting motions induced swirl/zigzag secondary circulation and prompted nonuniform maldistribution oscillations that deteriorated with decreasing frequencies. Regardless of excited degree of freedom, a qualitative loss of plug‐flow character was observed compared with static vertical beds which worsened as frequencies decreased. © 2015 American Institute of Chemical Engineers AIChE J, 61: 2354–2367, 2015     

Fenton法在水处理中的发展趋势

回顾了Fenton法在光化学与电化学两个方面的发展历程,并对其今后的发展趋势进行了阐述。     

吡唑类化合物的研究Ⅲ.1-苯基-3-羟基-4-苯甲酰基-5-吡唑酮的合成及其性质

合成的标题化合物为新螫合剂。质谱、红外、紫外及元素分析确定了化合物的结构.还测定了酸式电离平衡常数。     

二维双支腿流化床内气体混合特性

Experiments of gas mixing between two half-beds were performed in a dual-leg circulating fluidized bed(DL-CFB)240 mm in width,40 mm in depth and 2000 mm in height by using glass beads with diameter of 0.25-0.28 mm as bed material.SO₂ and CO as the gas tracers entering the left and right distributors separately were used to simulate the gas mixing between the two legs.MSD(mean square displacement)model was adopted to calculate the gas dispersion coefficient(D_w)which was used to investigate the effect of fluidization velocity and bed material inventory on gas mixing in the DL-CFB.The experimental results showed that D_w was about 50-300 cm²穝^-1 at different fluidization velocities and bed material inventories.A higher fluidization velocity benefited particles exchange between two half-beds,which intensified the gas-solids interactions at the region with higher solids volume fraction.The gas mixing in the lower region of the DL-CFB was stronger than that in the upper region of the bed.A higher bed inventory was helpful to gas mixing at a lower fluidization velocity,while a higher fluidization velocity weakened gas mixing because of higher solids concentration in the center of the bed that prevented gas mixing.     

硅醚的选择性去保护

用硅烷试剂保护羟基,介绍了通过底物控制（保护基团立体效应和电效应,硅醚分子的结构环境与电子云密度、邻近官能团影响）和试剂控制两种手段,在有多个硅烷保护基存在下的选择性脱保护。     

精四氯化钛中铝的检测研究

利用过量的碱与金属离子生成沉淀使其与铝分离。在pH为4.7时铝与铝试剂生成红色络合物,最大吸收波长为530 nm,铝溶液的颜色深度与铝含量成正比,借以比色测定铝。铝含量在1～50μg（50 mL）与吸光度呈良好的线性,样品进行测试的相对标准偏差为0.15％,加标回收率为98.4％～101.3％。     

Fenton试剂在有机废水处理中的应用

该文介绍了传统芬顿试剂在废水处理中的应用和作用原理,并总结了光芬顿试剂、电芬顿试剂、超声芬顿试剂、微波芬顿试剂、吸附/絮凝芬顿试剂等几种芬顿试剂类型,对各方法的特点、研究和应用情况进行了详细描述,展望了芬顿试剂法的研究方向和发展前景。     

超声波降解水中硝基苯研究

通过超声波、超声-H2O2、超声一Fealmon 试剂降解含硝基苯废水的试验,探讨了频率、声强、H2O2的投加量以及Fonton反应的最佳pH值等对硝基苯降解效果的影响.试验结果表明：当硝基苯浓度为 367 mg/L、频率为 40 kHz时、作用时间为 6 min,用超声波单独处理,硝基苯去除率效果只有30%;采用超声-H2O2联合技术可使硝基苯降解率明显提高,硝基苯降解率为62%;超声-Feaaton试剂处理效果最佳,在相同处理条件下,当pH=3时,硝基苯的降解率可达到86%.