QH—1型扁环填料萃取塔的设计计算

在系统研究的基础上，选择基于特性速度的方法，得出用于中代界面张力体系的ＱＨ－１扁环填料萃取塔的管速度计算公式，可用于工业装置的设计计算。     

QH-1型填料在中等界面张力体系的应用 Ⅱ.传质特性

应用三个中等界面张力（９．３７～１４．１６ｍＮ／ｍ）体系，对ＱＨ－１型扁环填料的传质性能进行了系统研究．实验数据采用以返流模型为基础的稳态浓度剖面法处理．研究了两相流速对传质效率和轴向返混的影响，进行了几种填料传质效率的比较．实验结果表明，ＱＨ－１型填料在中等界面张力体系中仍具有较高的传质效率，可望在湿法冶金、医药和环保中得到广泛应用．     

电感耦合等离子体原子发射光谱法测定镝铁电解粉尘中15种稀土元素

用硝酸和氢氟酸溶解试样,高氯酸冒烟除氟,在硝酸介质中用电感耦合等离子体原子发射光谱法(ICP-AES)测定了镝铁电解粉尘中La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb、Lu、Y 15种稀土元素。为了提高高含量元素的测定准确度,在测定基体元素Dy时,采用铟作内标;为了消除基体效应对稀土杂质元素测定的影响,采用基体匹配的校准曲线。镝铁电解粉尘中铁含量很低(铁的质量分数不超过1%),对测定没有影响。实验方法测定了一镝铁电解粉尘样品,结果表明,La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Ho、Er、Tm、Yb、Lu和Y 14个稀土杂质元素测定值与ICP-MS的测定值基本一致,镝和14个稀土元素的合量与重量法测得的稀土总量吻合。     

国产薄膜电容器自动分选机的更新换代

国产薄膜电容器自动分选机随着电容器技术的发展而不断更新换代。薄膜电容器分选机经历了 XF10、XF10 B、 XF10 D到 XF10 E的发展过程。构想的新一代分选机是竖装履带式分选机。     

高氮分散型乙丙共聚物粘度指数改进剂(HDOCP)的研制及工业化试生产

介绍乙丙共聚物粘度指数改进剂与聚异丁烯分别与马来酸酐接枝,再按一定比例混合后与多烯多胺反应生产高氮分散型乙丙共聚物粘度指数改进剂的研制过程和评定结果,以及工业化试生产情况。使用工业试验产品为粘度指数改进剂调制的１５Ｗ／４０ ＳＦ／ＣＤ 内燃机油通过了ＭＳ程序ⅤＤ试验,并提供给有关调油厂生产高档多级内燃机油。产品的性能与国外同类产品质量水平相当。     

分散抗氧型乙丙共聚物粘度指数改进剂DAOCP的研制

采用乙丙共聚物粘度指数改进为原料,经马来酸酐接枝、胺化后与苯胺类抗氧化合物反应得到产品分散抗氧型乙丙共聚物粘度指数改进剂。用中试放大产品为粘度指数改进剂调制的SF／CD 15W／40内燃机组,功能剂总量比使用分散型乙丙共聚物为粘度指数改进剂的油减少一个百分点后仍通过了MSⅢD架评定试验。评定结果表明,产品主要性能达到了国外同类产品的质量水平,为工业化生产提供了依据。     

评价聚丙烯抗老化性能的新方法

采用一种评价聚丙烯抗老化性能的氧化诱导测试新方法——前段以传统方法测定氧化诱导温度(Tind)的恒定速率升温-后段以传统方法测定氧化诱导时间(OIT)的温度恒温(即升温-恒温氧化诱导测试法),测定了添加不同含量抗氧剂Irganox B215的聚丙烯的抗氧化性能。这种氧化诱导测试法的特点:起始温度较低,以恒定速率升温至某一较高温度后恒温。实验结果表明,这种氧化诱导测试法简便易行,准确可靠,避免了容易引起误差的因素,能准确反映试样的热氧老化性能。用该方法测定的OIT能与用传统方法测定的OIT相互换算,可作为对高分子材料抗老化性能的初步测定的通用方法。     

Impurities especially titanium in the rare earth metal gadolinium— before and after solid state electrotransport

Gadolinium was prepared by conventional procedures of fluorination, reduction, distillation and solid state electrotransport（SSE）. The electronegativities of the metals were found to have an important influence on the electrotransport process and result of the impurity element. Meanwhile, titanium particles in the distilled gadolinium as major metallic impurities were studied by high resolution transmission electron microscopy（HRTEM） before and after solid state electrotransport. The results showed that impurities especially titanium transported from anode to cathode during SSE. In the metal before SSE, there were impurities of titanium in strip shape or embedded round shape. After SSE processing, titanium particles in the metal smaller than 50 nm in the cathode, but existed 6 to 10 times bigger in the anode.     

Effect of samarium on microstructure and corrosion resistance of aged as-cast AZ92 magnesium alloy

The effects of samarium（Sm） on microstructure and corrosion resistance of AZ92 magnesium alloy were characterized and analyzed by scanning electronic microscopy, X-ray diffraction, mass loss test, electrochemical impedance spectroscopy, X-ray photoelectron spectroscopy and potentio-dynamic polarization test. The results showed that the added Sm could promote continuous precipitation of β-Mg17Al12 phase in grains, and meanwhile restrain discontinuous precipitation of the same phase along the grain boundaries. Thus, the precipitations distributed more uniformly in the aged AZ92 magnesium alloys. When the content of Sm was 0.5 wt.%, the corrosion resistance of aged AZ92 alloy tended to be the best, which was due to the β-phase distributes more homogeneous reducing the galvanic corrosion. The corrosion product film had more integrality and compactness than AZ92 alloys without Sm. However, it resulted in worse corrosion resistance of AZ92 alloy because of the formation of mass cathodic Al2 Sm phase coming from excess Sm in AZ92 alloy.     

G.718宽带语音编解码器的DSP实现及优化

G.718是ITU-T最新提出的一种嵌入式可变速率宽带语音和音频编解码标准,该算法将语音信号进行分类编码,算法复杂度大大增加,但可以在窄带和宽带均达到极佳的语音质量.在分析其算法原理和关键技术的基础上,结合TMS320C55x系列DSP平台和G.718算法特点,提出了合理的汇编优化实现方案,在TMS320C5505EVM上完成了实时宽带语音编解码器.实验测试表明,G.718算法的语音质量优于同类型其他算法的宽带语音编解码器.