Ozonation of CI Reactive Black 5 using rotating packed bed and stirred tank reactor

This study investigates the ozonation of CI Reactive Black 5 (RB5) by using the rotating packed bed (RPB) and completely stirred tank reactor (CSTR) as ozone contactors. The RPB, which provides high gravitational force by adjusting the rotational speed, was employed as a novel ozone contactor. The same ozone dosage was separately introduced into either the RPB or the CSTR for the investigation, while the experimental solution was continuously circulated within the apparatus consisting of the RPB and CSTR. The decolorization and mineralization efficiencies of RB5 in the course of ozonation are compared for these two methods. Moreover, the dissolved and off‐gas ozone concentrations were simultaneously monitored for the further analysis. As a result, the ozone mass transfer rate per unit volume of the RPB was significantly higher because of its higher mass transfer coefficient and gas–liquid concentration driving force. Furthermore, ozonation kinetics was found to be independent of the gravitational magnitude of an ozone gas–liquid contactor. Therefore, the results suggest employing RPBs as ozone‐contacting devices with the advantage of volume reduction. The experimental results, which can be used for further modeling of the ozonation process in the RPB, also show the requirement of correct design for the RPB. Consequently, the present study is useful for the understanding of practical application of RPBs. Copyright © 2004 Society of Chemical Industry     

液相添加剂对PTCR陶瓷电性能的影响

液相添加剂ＡＳＴ（Ａｌ２Ｏ３＋ＳｉＯ２＋ＴｉＯ２）对ＢａＴｉＯ３陶瓷材料电性能的影响很大，随着Ａｌ２Ｏ３含量的增加，材料的电性能降低；ＳｉＯ２、ＴｉＯ２的物理特性对材料电性能影响较大；过量ＴｉＯ２对材料ＰＴＣ效应有重要影响，适当过量ＴｉＯ２含量，可得到性能优良的ＰＴＣＲ陶瓷。     

混合型表面活性剂液膜法处理含酚废水研究

研究了兰－１１３Ｂ＝Ｓｐａｎ－８０－－煤油ＮａＯＨ液膜体系处理苯酚废水的最佳操作工用于对高浓度含酚废水进行处理，实验结果表明，混合型表面活性剂各项指标均较好，除酚效率可达９９％以上，对内相ＮａＯＨ的最佳浓度的确定给出了估算方法。     

外循环型鼓泡式反应器气含率及循环液速率

对直径２８０ｍｍ、扩大直径５００ｍｍ、外循环管直径６５ｍｍ、总高２９００ｍｍ的外循环型鼓泡式反应器，在气体空塔线速Ｕｇ为０．０４－０．５５ｍ／ｓ时，用静压差法和脉冲示踪法测定了不同部位的气含率Ｅｇ，Ｅｐｇ和循环液速率ｕ１，并获得了它们的关联式：对反应段，Ｅｇ＝０．４５５６Ｕ＾０．３１９８ｇ〔Ｕｇ／（Ｕｇ＋Ｕ１）〕＾０．７３９６；对反应器扩大段，Ｅｕｇ＝０．９３８９Ｕ＾０．４４３１ｕｇ；对循环管，Ｅ     

Separation of di- and tripeptides with solvent extraction and an emulsion liquid membrane

The extraction equilibria of various di- and tripeptides with di-2-ethylhexylphosphoric acid (D2EHPA) were studied at low pH values. The complex extracted to organic phase consisted of one molecule of peptide and two molecules of D2EHPA dimer. The extraction constants of the peptides correlated well with the distribution coefficients of peptides between 1-octanol and water, which is a measure of hydrophobicity. The permeation rates of peptides through an emulsion liquid membrane were examined by using D2EHPA as a carrier, Span 80 as an emulsifier and kerosene as a diluent. The rates varied considerably with peptide type, depending upon the hydrophobicity.     

中温低氰液体碳氮共渗及其应用效果

通过金相、硬度、耐磨性等测试分析表明，在“６０３”液体渗碳基础上研制出的新型中温低氰液体碳氮共渗剂对薄片件进行薄层碳氮共渗．能完全满足技术要求，并且取得了良好经济和社会效益．     

高速波长可调液晶滤波器

描述了适用于光波分复接网络高速连续可调液晶滤波器。该滤波器利用手征近晶型液晶作为Ｆ－Ｐ标准具有源腔材料得到了微秒级开关速度。使用商品 ＢＤＨ７６４Ｅ液晶材料制成地光滤波器，开关速度小于１０μｓ，可调范围给３０ｎｍ，通带中心在１．５５μｍ。     

棉铃宝高效液相色谱分析方法研究

本法采用同一色谱条件反相高效液相色谱法测定棉铃宝中甲基对硫磷和辛硫磷的含量，方法简单易行，具有较高的精密度和准确度，其回收率分析为甲基对硫磷９９．５９％，辛硫磷１０１．０％。     

硝胺发射药燃速压力指数对内弹道性能的影响

通过将硝胺发射药实际的燃速方程,引入一维定常流、相对变量无量纲的经典内弹道计算程序,计算了RB型硝胺发射药在不同的压力指数及高压力指数区间下,弧厚、药量和挤进压力等起始条件变化对弹道性能的影响.结果表明,高压力指数能增加射击起始条件等参量对弹道性能的敏感性,而且随着高压力指数的增加及其区间的扩大而加剧.但也发现,在弹道性能上,密度为1.620g/cm~3的RB型硝胺发射药的燃速压力指数,对射击起始条件等参量的敏感性与三基药相接近,并未发现明显的弹道不一致性或安全性问题的征候.