用统计数据计算方法控制引上机的“改炉”操作

一、概况目前我国有槽引上法生产的玻璃厚度有2、3、4、5、6mm等几种.根据订户的需要,须经常改变引上机生产玻璃的厚度,有时由薄变厚,有时由厚变薄.这种改变,我厂     

负载型钴铜双金属氮化物催化氨分解研究

Co and Mo bimetallic nitrides supported on Mg（Al）O, MgO and γ-Al2O3 were prepared in temperatureprogrammed reactions with NH3. The surface morphology, chemical composition and catalytic activity for NH3 decomposition on the supported Co and Mo bimetallic nitrides were studied by X-ray diffractometer （XRD）, NH3 temperature-programmed desorption and mass spectrometer （NH3-TPD-MS）, temperature-programmed desorption and mass spectrometer （TPD-MS）, H2 temperature-programmed surface reaction （H2-TPSR） and activity test. The phases of Co3Mo3N and MoN could be formed on Mg（Al）O, MgO and Al2O3 during the nitridation, and they might be more uniformly dispersed on Mg（Al）O and MgO than on γ-Al2O3. Transition metallic nitrides are generally considered as potential catalysts for hydrogen-involving reactions due to the entrance of hydrogen atoms into subsurface and the lattice of metallic nitrides. The diffusion of nitrogen in the bulk and the structure transformation of Co and Mo nitride compounds occur during NH3-TPD, but the supported Co and Mo bimetallic nitrides are not easily reduced at H2 atmosphere. Co3Mo3N/Mg（Al）O catalyst exhibits the highest activity, while Co3Mo3N/Al2O3 exhibits the lowest activity for NH3 decomposition. Furthermore, the catalytic activity of Co and Mo bimetallic nitrides is not only much higher than that of supported single metallic nitride, but also highly dependent upon the surface acidity and BET surface area of support.     

2．7MPa脱碳装置改造总结

鲁西化工股份有限公司第一化肥厂现有2套脱碳装置，一、二系统设计能力分别为4．0万t／a、8，0万t／a合成氨。我厂自1998年起先后对2套装置进行技术改造，使合成氨生产能力翻了一番(2002年全年生产合成氨25．8万t)，其中一系统脱碳技术改造动作大，生产能力增长了2倍，达到     

胶粘剂工业与环境保护

<正> 胶粘剂工业(包括密封剂工业)对环境保护的问题日益受到重视。据推算,现在世界该工业每年散发至大气中的有机挥发分——溶剂至少达350万吨。既是能源的浪费,又是环境的公害。各国在环保条例的压力下(如美国洛杉矶南海岸空气质量管理地方法1168条就确定了胶粘剂产品中有机挥发分的     

企业核心竞争力关键要素——质量

介绍了如何体现产品质量及如何控制产品质量。     

沈阳市化学化工学会召开理事会会议

市化学化工学会一九八六年第一次理事会会议于元月廿三日在市科学馆召开,十九位理事出席了会议。市科协宋副主席及学会部的同志,到会作了指导,常务副理事长黄祀馨同志,秘书长贾渊明同     

热处理制度对高ZnO含量的Li2O-Al2O3-SiO2系统玻璃析晶及热膨胀系数的影响

以TiO2 ZrO2 P2O5为复合成核剂,采用传统熔融冷却法获得了高ZnO含量的Li2O-A l2O3-SiO2系统的基础玻璃。通过差热分析确定了该玻璃的热处理条件、晶化性能,利用梯温炉实验、X射线衍射分析和扫描电镜对晶化试样的物相和微观结构进行了研究,讨论了热处理制度对玻璃的析晶及热膨胀系数的影响。研究结果表明:含10%(质量分数)ZnO的LAS系统样品玻璃最佳核化温度为(710±2)℃,玻璃的晶化活化能E为(275±2)kJ/mol,晶化指数n为3.11±0.2,样品玻璃在较低温度下失透,并且随着晶化温度升高,样品的热膨胀系数加大。