铈盐引发高吸附量氨基化PGMA高分子微球合成及去除废水中Cr(VI)(英文)

A novel polyglycidylmethacrylate(PGMA) microspheres with high adsorption capacity of Cr(VI) was prepared by cerium(IV) initiated graft polymerization of tentacle-type polymer chains with amino group on polymer microspheres with hydroxyl groups.The micron-sized PGMA microspheres were prepared by a dispersion polym-erization method and subsequently modified by ring-opening reaction to introduce functional hydroxyl groups.The polymer microspheres were characterized by scanning electron microscopy(SEM) and Fourier transform infrared spectroscopy(FTIR).The results indicated that the polymer microspheres had an average diameter of 5 μm with uniform size distribution.The free amino group content was determined to be 5.13 mmol?g?1 for g-PGMA-NH2 mi-crospheres by potentiometric and conductometric titration methods.The Cr(VI) adsorption results indicated that the graft polymerization of tentacle-type polymer chains on the polymer microspheres could produce adsorbents with high adsorption capacity(500 mg?g?1).The polymer microspheres with grafted tentacle polymer chains have poten-tial application in large-scale removal of Cr(VI) in aqueous solution.     

液液液三相萃取装置:操作参数对传质效率的影响(英文)

A new mixer-settler-mixer three chamber integrated extractor is proposed in this work for liquid-liquid-liquid three phase countercurrent and continuous extraction.Experiments revealed the influences of the structural design of the three-liquid-phase extractor and some key operational parameters on three-phase partition of two phenolic isomers,p-nitrophenol(p-NP) and o-nitrophenol(o-NP).The model three-liquid-phase extraction system used here is nonane(organic top-phase)-polyethylene glycol(PEG 2000)(polymer middle-phase)-(NH4)2SO4 aqueous solution(aqueous bottom-phase).It is indicated that agitating speed and retention time in three-phase mixer are key parameters to extraction fraction of nitrophenol.Dispersion band behavior is related to agitating in-tensity,and its occurrence does not affect the extraction fraction of target compounds.The present work highlights the possibility of a feasible approach of scaling up of the proposed three-phase extraction apparatus for future in-dustrial-aimed applications.     

基于灰色关联的复杂碳酸盐岩测井岩相识别

岩石结构及成分的解释是碳酸盐岩沉积储层研究的基础,基于各种数学方法的测井岩相识别是非取心井沉积微相解释的关键.由于复杂碳酸盐岩的测井多解性,其岩相的测井识别一直是个难题.以四川盆地中部磨溪气田嘉二段测井岩相解释为例,介绍了灰色关联分析方法在复杂碳酸盐岩测井岩相识别中的应用,灰色关联较之其他数学方法具有模型简单、计算快速等优点,经与取心井对比分析,其岩性识别的准确程度较高,获得了很好的实际应用效果.     

国产IIR的应用研究

研究国产IIR l751在气囊、隔膜及自行车内胎中的应用效果，并与进口产品IIR268进行对比。IIRl751用于气囊和隔膜工具胶中，其半成品和成品的强伸性能均较好；用于自行车内胎中，其性能达到国家标准要求；IIRl751混炼胶的门尼粘度大于IIR268，硫化胶耐高温热老化性能和抗硫化返原能力不如IIR268，生产的气囊和隔膜在使用后期易变软，尚需改进。     

定向用新型PDC钻头研制及现场试验

针对常规PDC钻头用于定向施工时,扭矩大,工具面不稳定,所加钻压较小,机械钻速低的情况,提出了研制新钻头的各种考虑因素,并研制出了一种定向用新型PDC钻头,现场应用表明,它具有抵扭矩、长寿命、破岩效果好等特点。     

川东高陡构造薄层碳酸盐岩裂缝性储集层预测

以四川盆地东部大池干井构造带三叠系嘉陵江组二段一亚段(T1j21)裂缝性储集层为例,从构造曲率角度出发,预测高陡构造地区薄层碳酸盐岩裂缝性储集层分布区.采用趋势面拟合法和差分法计算面曲率,用三点圆弧法及曲线拟合法计算线曲率,在此基础上,将4种数学方法计算得到的曲率值进行归一化处理,得到各方法的相对曲率值并取其最大值(即综合曲率)进行裂缝分布预测,即综合曲率法,以克服单一曲率计算方法预测的不足.通过与油气显示、气井产能测试等资料对比分析,认为用综合曲率法预测裂缝效果优于单一曲率方法,综合曲率值与区内气井产能的相关系数最大,说明综合曲率法提高了曲率法预测裂缝的准确程度,能更好地预测地下构造裂缝的分布范围.     

硫黄直接投入密炼机进行二段混炼

硫黄直接投入密炼机进行二段混炼在橡胶混炼工艺中，将硫黄直接投人密炼室与一段胶料进行二段混炼，可以提高混炼均匀性，提高混炼速度，改善生产环境，降低劳动强度。广州第一橡胶厂利用ＧＫ２７０Ｎ型密炼机的性能特点，开展了硫黄直接投人密炼机进行二段混炼的工艺试验...     

磨41加深大斜度井钻井技术

磨41井由原来的直井加深钻成一口大斜度定向井,该井小井眼井段长,井斜角大,靶区窄,使用钻井液密度高,不同地层压力梯度差异大,施工泵压高,钻井过程非常困难。该井的钻井技术较全面地体现了加深井的特点和难度。文中对该井钻井技术进行了分析总结,将会对同类井的设计和施工有所帮助。