新试剂2－（6－甲基－2－苯并噻唑偶氮）－5－二乙氨基酚分光光度法测定微量镍

本文报道用新试剂２－（６－甲基－２－苯并噻唑偶氮）－５－二乙氨基酚（ＭＢＴＡＥ）分光光度法测定微量镍。Ｎｉ：ＭＢＴＡＥ＝１：２，ε＝８．１×１０４Ｌ／ｍｏｌ·ｃｍ，Ｎｉ２＋浓度在０～２２μｇ／２５ｍＬ范围内服从比尔定律。用于金属有机化合物中微量镍的测定，结果与理论值相符。     

The hydrogenation of toluene over nickel loaded Y zeolites

The catalytic activities of a range of hydrogen reduced nickel Y zeolites for the hydrogenation of toluene were measured and correlated with the following catalytic parameters: reaction temperature; reaction time; coke deposition. The role of the alkali metal co-cation (Li⁺, Na⁺, K⁺, Rb⁺ or Cs⁺) in influencing the overall hydrogenation activity of the supported nickel metal was probed. The effect of poisoning the surface Bronsted acidity by the adsorption of ammonia is discussed. For comparative purposes, data on the hydrogenation of benzene over the same catalysts are included.     

壳聚糖对化学镀镍废液中Ni^2＋吸附

研究了用壳聚糖吸附化学镀镍废液中Ni^2＋的最佳条件及其脱附和再生方法，以及镀液中络合剂等其他组分对吸附率的影响。结果表明，壳聚糖对化学镀镍废液中的Ni^2＋具有较好的吸附能力，pH是影响吸附的主要因素。在室温、pH=5．0时，Ni^2＋质量浓度为4．6952g／L的化学镀镍废液被0．9390g壳聚糖吸附2h后，Ni^2＋的去除率达72．25％。     

光亮碱性化学镀镍工艺研究

通过均匀设计法 ,优选了芳香基磺酸盐、芳香醛、炔醇以及含铅、含碘添加剂 ,从而开发了一种光亮碱性化学镀镍新工艺。所得镀层光亮 ,色泽均匀。讨论了主盐、还原剂、温度及pH值对镀速的影响 ,检测了镀液、镀层的性能     

新型GeSe2-Ga2Se3-KI系统硫卤玻璃形成的研究

开发了有高含量碱金属离子的新型硫化物玻璃.合成了GeSe2-Ga2Se3-KI系统的玻璃样品.研究了该系统的玻璃形成区并用孤对电子理论进行了解释.讨论了Ga2Se3和KI对玻璃形成能力的影响.给出了该系统玻璃的密度、特性温度、Raman和可见一红外光谱等.实验结果表明:该系统具有较广的玻璃形成区,某些组成,如摩尔组成为50 GeSe2 25Ga2Se3 25KI的样品具有良好的热学和光学性质,其表征热稳定性的特征温度差大于120K,玻璃透光范围从590nm到14.2μm.     

Electrochemical Behaviour of Al, Al—In and Al–Ga–In Alloys in Chloride Solutions Containing Zinc Ions

The electrochemical behaviour of Al, Al—In and Al–Ga–In alloys in 0.6 m NaCl solutions with and without Zn²⁺ was investigated. The study was performed by means of open circuit potential, potentiodynamic polarization, potentiostatic current-time and electrochemical impedance spectroscopy measurements as well as by SEM-EDAX examination. It was found that the Al—In alloy exhibits the highest negative open circuit potential in 0.6 m NaCl and the corrosion resistance of the tested electrodes decreases in the following order: Al > Al–Ga–In > Al—In. The greater activity of the Al—In alloy was interpreted on the basis of the autocatalytic attack by indium. The potentiostatic current–time measurements in Zn²⁺ containing electrolyte at potentials above the pitting potential revealed that Zn²⁺ has an insignificant influence on the Al electrode, while it enhances the corrosion of the Al–Ga–In alloy and improves the attack morphology of the Al—In alloy. Furthermore, the impedance spectra recorded under open circuit conditions showed a decrease in the polarization resistance of Al—In and Al–Ga–In alloys in presence of Zn²⁺ indicating the activating effect of Zn²⁺ ions.     

Synthesis of fluorine-graphite intercalation compounds by elemental fluorine and high oxidation-state transition-metal fluorides

Fluorine-graphite intercalation compounds have been synthesized using high purity fluorine gas and high oxidation-state transition-metal fluorides, AgF₃ and NiF₃, at room temperature and at −78 °C. At room temperature, a mixture of stage 1 + 2 − 4 compounds with compositions, C_4.2F to C_14.6F were obtained. On the other hand, stage 2–4 compounds with compositions C_5.6F to C_14.2F were synthesized at −78 °C. The fluorinating ability of AgF₃ and NiF₃ has been shown more clearly at room temperature because a small amount of fluorine was intercalated/absorbed into graphite at −78 °C without catalysts. XPS spectra show that ionic, nearly ionic, semi-covalent and covalent fluorines coexist in the C_xF samples, and that the covalency of CF bonding increases with decreasing stage number.     

Continuous hydrogenation of vegetable oils in reactors equipped with static mixers

Continuous hydrogenation of industrially refined soybean oil with Harshaw Ni catalyst was achieved in a slurry column equipped with Sulzer SMV motionless mixers. The influence of the operating parameters (temperature, pressure, catalyst concentration and gas velocity) was investigated. The presumption that, in this equipment, the liquid-solid mass transfer limits the rate of the process is in good agreement with the experimental data.     

含氯离子废水化学需氧量分析方法比较

含氯离子废水化学需氧量的分析方法的研究是当前环境监测研究的热点之一，各种文献报道也较多，但各自使用的效果不一。采用试验的方法对含氯离子废水中CODCr的分析进行了初步研究，比较了硫酸汞加入法、稀释法、硝酸银滴定法、氯气校正法、氯离子校正法等方法在不同化学需氧量不同氯离子浓度下的分析结果，利用分析结果与配置的标准溶液浓度相比较，分析了各种方法的优缺点，结果表明硝酸银滴定法是比较理想的适应范围较广的方法。     

Effect of randomization on the oxidative stability of corn oil

Randomized corn oil TAG oxidized much faster than natural oil, but after purification with alumina, they oxidized at the same rate. We showed that this effect could not be attributed to a difference, in total tocopherols in the randomized and natural oils. Polar material recovered from the alumina treatment was fractionated by TLC, and a pro-oxidant effect was found in the fractions containing MAG and DAG. However, MAG and DAG, although mild pro-oxidant could not account for the pro-oxidant effect generated by randomization. No other compounds could be detected in the MAG fraction by MS. The pro-oxidant effect of randomized oil disappeared when EDTA or citric acid was added in sufficient amounts. The pro-oxidant effect of randomized corn oil was increased by the incorporation of additional copper or iron at a concentration that did not catalyze oxidation of the purified oil. Treatment of corn oil with ascorbic acid, ascorbyl-6-palmitate, ethyl acetoacetate, ethyl diacetoacetate, and acetylacetone did not reproduce the effect of the unknown pro-oxidant. Although the identity of the pro-oxidant is still unknown, we have confirmed that it is produced during randomization; it does not have pro-oxidant activity alone, but it facilitates the catalytic activity of the transition metal ions.