高模低缩级大有光切片的质量控制

针对高模量低收缩涤纶工业丝的生产特点,推出了高模低缩级大有光切片,并制定了相应的产品质量标准,在聚酯生产中对原料使用、浆料配制工序、反应釜工艺参数调整、粒子尺寸及含水率进行了有效控制,使产品能更好地满足高模低缩级大有光切片的产品质量标准。     

用于formose反应的固载型催化剂的制备研究

采用白球做载体,通过溴乙基将苯并噻唑固载在白球上,制得交联聚苯乙烯固载型苯并噻唑鎓盐催化剂,并将其用于甲醛聚糖反应。试验分别考察了反应温度、反应时间等对催化剂制备的影响,并通过红外光谱检测其结构特征。结果表明,催化剂的最佳制备条件为110℃反应20 h。该催化剂可以有效地催化甲醛聚糖反应,便于回收套用。     

加盐萃取精馏分离乙醇—水体系的研究进展

乙醇在化工、医药和电子等领域有广泛的应用,燃料乙醇作为可再生能源,已成为世界各国新型能源研发的重点。加盐萃取精馏是在溶盐精馏和萃取精馏的基础上发展起来,目前加盐萃取精馏是分离乙醇—水体系的重要方法。本文将分别介绍溶盐精馏和萃取精馏,以及加盐萃取精馏分离乙醇—水体系的研究现状及发展前景。     

二次通用旋转组合设计优化盾叶薯蓣黄色素超声提取工艺

采用超声波辅助二元混合溶剂对黄姜黄色素的提取工艺过程进行研究,在考察了溶剂配比、料液比、提取时间、超声功率的单因素实验基础上,对这4个因素进行L31(45)的二次通用旋转组合设计优化实验。以黄色素提取率为目标建立数学回归模型,通过对实验结果进行方差分析及对数学模型进行优化得到优化工艺条件:丙酮∶无水乙醇为1∶5(体积比),料液质量体积比1∶11 g/m L,提取时间70 min,超声功率90 W。在此条件下,黄色素的提取率为0.160 4‰。该提取工艺稳定,可为黄姜黄色素超声提取放大工艺研究以及资源化利用提供理论参考。     

300kt/a低压氨合成技术应用总结

详细介绍了300 kt/a低压氨合成装置的系统配置、催化剂装填、催化剂升温还原、生产运行等情况。低压氨合成装置投运后,各项工艺指标均较为理想,表明GC型低压氨合成技术较为成熟、稳定、可靠、先进。     

Role of activated carbon on micropollutans degradation by ionizing radiation

The objective of this study was to analyze the influence of the presence of activated carbon on the degradation of the triiodinated contrast medium diatrizoate (DTZ) by the simultaneous use of gamma radiation and activated carbon. Four commercial activated carbons (Ceca, Witco, Sorbo, and Merck) with different textural and chemical characteristics were used for this purpose. The percentage DTZ removal obtained was considerably higher with the gamma radiation/activated carbon (GM/AC) system than with radiolysis in the absence of activated carbon, and it depended on the specific activated carbon employed. First, we optimized the amount of activated carbon required to maximize the amount of DTZ removed by the GM/AC system (0.06 g). The degradation constants were higher with the GM/AC system than with radiolysis alone, evidencing a synergic effect that favors pollutant removal. This synergic effect is independent of the textural but not the chemical characteristics of the activated carbon, observing a higher synergic activity for carbons with a higher surface content of oxygen, specifically quinone groups. We also highlight that the synergic effect of the activated carbon requires adsorbent–adsorbate electrostatic interaction and is absent when this interaction is hindered.     

Atom transfer radical polymerization (ATRP): A versatile and forceful tool for functional membranes

The progress in atom transfer radical polymerization (ATRP) provides an effective means for the design and preparation of functional membranes. Polymeric membranes with different macromolecular architectures applied in fuel cells, including block and graft copolymers are conveniently prepared via ATRP. Moreover, ATRP has also been widely used to introduce functionality onto the membrane surface to enhance its use in specific applications, such as antifouling, stimuli-responsive, adsorption function and pervaporation. In this review, the recent design and synthesis of advanced functional membranes via the ATRP technique are discussed in detail and their especial advantages are highlighted by selected examples extract the principles for preparation or modification of membranes using the ATRP methodology.     

除油脱氮+A~2/O+深度处理的综合工艺处理针状焦污水

采用除油脱氮+A2/O+深度处理的综合工艺处理针状焦生产废水达到《山东省南水北调沿线水污染物综合排放标准》(山东省地方标准DB 37/599-2006)排放标准。