粉煤灰微波合成沸石在水处理中的应用

以粉煤灰为原料采用微波水热合成法制备沸石,将其用于废水处理中,考察了粉煤灰合成沸石对氨氮、磷、Fe2+、Mn2+、Cu2+的去除效果.实验结果表明,与粉煤灰相比,粉煤灰合成沸石具有更高的氨氮、磷去除率;在吸附去除废水中的Fe2+、Mn2+、Cu2+时,合成沸石比天然沸石更有效.     

好氧菌群降解番茄酱加工废水的工业应用

研究了高效降解菌群对天业番茄制品有限公司废水的处理效果.结果表明:加入菌群能够有效缩短污泥培养时间;在41 d的处理期内,进水COD平均为743.07mg/L时,COD去除率平均为59.27％,出水COD平均为278.79 mg/L,出水pH为7.04,SS≤150 mg/L,出水符合GB 8978-1996《污水综合...     

Preparation of Diacylglycerol-Enriched Oil from Free Fatty Acids Using Lecitase Ultra-Catalyzed Esterification

Production of diacylglycerol-enriched oil by esterification of free fatty acids (FFA) with glycerol (GLY) using phospholipase A1 (Lecitase Ultra) was investigated in this work. The variables including reaction time (2–10 h), water content (2–14 wt%, FFA and GLY mass), enzyme load (10–120 U/g, FFA and GLY mass), reaction temperature (30–70 °C) and mole ratio of GLY to FFA (0.5–2.5) were studied. The optimum conditions obtained were as follows: reaction temperature 40 °C, water content 8 wt%, reaction time 6 h, molar ratio of GLY to FFA 2.0, and an enzyme load of 80 U/g. Under these conditions, the esterification efficiency (EE) of free fatty acids was 74.8%. The compositions of the FFA and acylglycerols of the upper oil layer (crude diacylglycerol) of the reaction mixture were determined using a high temperature gas chromatograph (GC). The crude diacylglycerol from the selected conditions was molecularly distilled at 170 °C evaporator temperatures to produce a diacylglycerol-enrich oil (DEO) with a purity of 83.1% and a yield of 42.7%.     

Synthesis of LiFe0.4Mn0.6?xNixPO4/C by co-precipitation method and its electrochemical performances

LiFe_0.4Mn_0.6−x Ni _x PO₄/C(x = 0, 0.05, 0.1, and 0.2) composite cathode materials for lithium ion batteries have been prepared by the co-precipitation method using oxalic acid as a precipitator. The structure and morphology of precursors and products have been investigated. Electrochemical tests demonstrate that LiFe_0.4Mn_0.55Ni_0.05PO₄ can deliver a specific capacity of 142 mAh g⁻¹ at 0.1 C, and retains 133 mAh g⁻¹ after 60 cycles. The rate performance of LiFe_0.4Mn_0.6PO₄ is obviously improved by doping Ni. The capacity of LiFe_0.4Mn_0.55Ni_0.05PO₄ at 2 C is 110 mAh g⁻¹.     

我国橡胶工业2010年回顾与2011年展望(三)

论坛模具行业:调结构、转方式仍是主旋律 近几年,随着中国汽车工业的快速发展,我国轮胎和轮胎模具行业也得到飞速发展.我国想成为世界轮胎制造的强国,除了轮胎行业自身的努力和提高以外,还必须大力发展我国的橡胶机械和轮胎模具工业的生产,轮胎模具是轮胎工业实现由大到强转变的关键,因此,大力发展轮胎模具工业意义重大而艰巨.     

Synthesis and Characterization of a Novel Series of Cationic Fumaric Polymerizable Emulsifiers

A series of novel cationic fumaric polymerizable emulsifiers (named as F series emulsifiers) were synthesized. The chemical structures of these emulsifiers were confirmed by ¹H NMR and MS and their minimal inhibitory concentrations to Escherichia coli were determined. Antibacterial tests of latex films showed that [2-(N-benzyl-N,N-dimethylamino)ethyl]dodecyl fumaric ammonium bromide, [2-(N-benzyl-N,N-dimethylamino)ethyl]decyl fumaric ammonium chloride and [2-(N-benzyl-N,N-dimethylamino)ethyl]dodecyl fumaric ammonium chloride can possibly be used as a polymerizable bactericides.     

干熄焦焦炭浮起处理分析及优化

结合安钢75 t/h干熄焦生产实际,介绍了干熄焦生产过程中由于循环风量与排焦量不相匹配,易发生斜道口焦炭浮起故障,改进后的处理方法大幅缩短故障处理时间,从而保证了干熄炉安全、稳定运行,提高了经济效益建议。     

基于人工神经网络的釉料厚度沉积率模型拟合软件模块的开发与实现

釉料厚度沉积率模型是机器人自动施釉的重要依据。为了进行陶瓷产品的机器人离线编程作业的轨迹自动规划,实现施釉过程中工件釉料厚度的精确性和均匀性,以釉料厚度沉积率模型为研究对象,采用MFC开发了釉料厚度沉积率模型软件功能模块。提出基于神经网络算法拟合沉积模型方案;利用COM形式的VC与MATALB的混合编程实现模型拟合、模型分析功能;设计动态链接库,使模型拟合结果产生word报表。通过试验进行试验验证,结果表明,其最大误差在5um范围之内,从而验证了模型的正确性和有效性。软件界面友好,符合工程实际,提出的方法有助于提高施釉机器人釉料厚度的控制精度,为后续的陶瓷自动施釉离线编程轨迹规划的软件编程和仿真实现提供了具体可操作的模型依据与方法指导。     

聚丙烯酸酯类柴油降凝剂的改性研究

主要目的是对聚丙烯酸酯类降凝剂进行改性研究,实验以丙烯酸和十八醇为原料,采用直接酯化法合成丙烯酸十八酯,将其分别与马来酸酐、苯乙烯和乙酸乙烯酯合成聚合物,通过红外光谱仪进行检测,证实聚合物合成成功,最后分别考察三种聚合物及复配的降凝效果。实验结果表明：苯乙烯-乙酸乙烯-聚丙烯酸十八酯的降凝效果最好,对南充炼油总厂0#柴油,凝点可降低15℃,将该聚合物与吐温-20和斯盘-40进行复配,聚合物的降凝效果有所改善。     

巯基改性毛发状聚苯乙烯微球的制备

通过顺序添加单体到表面负载可逆加成断裂链转移(RAFT)试剂的亚微米级单分散聚苯乙烯微球胶乳中,采用紫外光引发制备了聚N-异丙基丙烯酰胺-b-聚甲基丙烯酸缩水甘油酯(PNIPA-b-PGMA)两嵌段毛发状聚苯乙烯微球.反应过程中,单体的转化率以及微球的粒径随反应时间基本呈线性增长,具有活性自由基聚合的特征.然后分别在酸...