选煤厂洗水闭路循环改造及效果

根据生产实际中洗水不能闭路循环的问题 ,因地制宜进行改造和加强管理 ,实现洗水闭路循环。     

利用煤化工艺设备对洗油深加工

利用工业萘生产装置 ,在工业萘生产的空余时间 ,对洗油进行深加工 ,制取工业萘及甲基萘等产品 ,实现一套装置的多种使用 ,提高企业经济效益     

A method to estimate entropies and heat capacities applied to alkali oxides

We present a method that is useful in the estimate and assessment of heat capacity data. The approach is based on an analysis of the logarithmic average of the phonon frequencies. In this quantity, that may be easily derived from experimental data on the vibrational entropy, the influence of atomic masses can be exactly accounted for even in polyatomic solids. Our method is applied to Li₂O, Na₂O, K₂O, Rb₂O, and Cs₂O. In particular, literature data for K₂O are critically examined.     

洗煤厂渣浆泵的一种机械调速方法

某洗煤厂渣浆介质泵介质密度高,负荷较重,导致拖动该渣浆泵的异步电动机接近过负载,电动机定子绕组发热严重.同时,渣浆泵在运行中调节出口阀门控制流量,致使出口压力偏大,给设备安全运行带来不利影响.针对以上问题,改用机械调速方式,对存在的问题进行了解决,并取得较好的节电效果.     

用于铜的化学机械抛光液的研究

文中介绍了一种以碱性抛光液对铜进行全局平面化的方法 ,讨论了以 Si O2 水溶胶为磨料的抛光液在Cu-CMP过程中的化学 (络合 )作用及反应机理 ,并给出了抛光液的配比及上机实验结果。结果表明 :该抛光液用于对带有阻挡层和介质层的铜抛光 ,达到了对铜层的高去除速率和高选择比 ,取得了较好的全局平面化效果     

Chemistry and Physics of Alkali Metals on MoS2 Surfaces

The interaction of alkali metal with surfaces has been of great interest to the community of catalysis since alkali metal can play an important role as a promoter. On alkali-doped MoS₂, such a promotion effect of alkali metal has been exemplified in the direct synthesis of linear alcohols from CO and H₂, where the alkali-doping switches the catalyst selectivity from methanation to alcohol synthesis. This paper reviews recent high-resolution X-ray photoelectron spectroscopy experiments that have provided direct observation of electron transfer from alkali metals to a model single crystal MoS₂ and the capture of the supra-valence electrons in the subsequent oxidation reactions.     

碱对AlMCM-41介孔分子筛合成的影响

分别用NaOH和TEAOH合成了AlMCM 4 1介孔分子筛 ,用XRD、2 7AlMASNMR、SEM、TEM、IR、N2 低温吸附和TG DTA对样品进行了表征和比较。结果表明 ,TEAOH和NaOH对AlMCM 4 1有序结构的影响不同。当硅铝原子比为 2 5或 5 0时 ,用NaOH合成的样品有序性较高 ;而当硅铝比为 15时 ,用TEAOH合成的样品有序性较高。交换成氢型AlMCM 4 1后 ,当硅铝比为 2 5或 15时 ,用TEAOH合成的样品抗水解性能优于用NaOH合成的样品 ,其酸量也较大。用TEAOH合成的样品粒度小 ,比表面积、孔径和孔体积都大于用NaOH合成的样品     

提高压力过滤器滤套使用寿命的途径

佳木斯造纸厂从芬兰奥斯龙公司引进了一套新型、高效、低碱流失的压力过滤、洗涤苛化系统。本文就如何延长该系统主体元件──滤套的使用寿命这一技术问题，进行系统的阐述。     

Effect of high temperature alkali cooking on the constituents,structure and thermal degradation of hemp fiber

Degumming of hemp fiber by high temperature alkali cooking was investigated, and the effect of temperature and dosage of alkali on the constituents, structure, and thermal degradation of hemp fiber was also discussed in this work. The morphology, structure, and thermal degradation of hemp fiber after high temperature cooking were investigated through SEM, FTIR, WAXD, and TG analysis. The results indicated that the high temperature cooking process was effective for removing hemicelluloses and lignin and could also improve the thermal stability of cellulose. Crystallinity index of the treated hemp fiber was increased, which was related to the cooking temperature and NaOH dosage. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

从环己烷氧化液酸洗水中回收己二酸的技术进展

介绍了由环己烷氧化液酸洗水中回收副产的己二酸的方法,主要分析了溶剂萃取法、氧化法、皂化-酯化法的特点及其存在的缺点,指出今后应着重开发新型的己二酸萃取剂,寻求环保型的化学回收方法,并加强对酸洗水新型氧化剂的研究。