带HRS预转化工艺在烟气脱硫中的应用

介绍了高硫煤脱硫和制酸工艺的选择。高硫煤燃烧烟气采用有机胺法脱硫,解吸出的高浓度SO_2气体果用带HRS的预转化单吸制酸工艺加以处理。通过孟莫克预转化工艺、一转一吸工艺、带蒸汽喷射HRS工艺三位一体优化组合,使得制酸装置副产蒸汽量最大化、投资最小化进转化工序气体φ（SO_2）20.0%～22.0%较佳,HRS系统的吨酸...     

MDEA-PZ复合胺溶液吸收烟气中CO2实验研究

采用搅拌实验装置,研究不同摩尔配比的MDEA-PZ复合胺溶液对烟道气中CO2的吸收和解吸性能,揭示了吸收速率、吸收量与吸收时间、pH值、电位之间的内在联系;对CO2初始选出温度、试液再生温度、再生率、再生pH值下降率进行了分析.结果表明,MDEA-PZ二元复合体系吸收效果优于单组分MDEA、PZ的吸收效果.MDEA-P...     

氨基树脂对SiO2/有机硅杂化硬质涂料性能的影响

以正硅酸乙酯(TEOS)和有机硅氧烷为主要原料,采用溶胶-凝胶(sol-gel)技术合成透明的SiO2/有机硅溶液,引进氨基树脂在聚碳酸酯(PC)表面上制备硬质的硅/胺杂化薄膜。考察了氨基树脂用量对SiO2/有机硅涂料性能的影响,并采用红外光谱(IR)、紫外光谱(UV)、热重分析(TG)、粒径分析仪和扫描电镜(SEM)等方法对硅/胺杂化涂料进行了表征。结果发现,硅/胺杂化树脂胶粒的粒径为162 nm。添加少量的氨基树脂能够明显改善涂膜的耐碱性能,在碱液中浸泡24 h后,薄膜的透光率为90.7%,对PC基材仍具有一定的增透作用。杂化固化膜呈均相致密结构。当w(氨基树脂)=2%时,薄膜对PC基材的附着力为1级,铅笔硬度为2H。氨基树脂的添加使硬质薄膜的热稳定性有所降低。     

直接滴定法测定甜菜碱产品中活性物和游离叔胺的含量

研究了用盐酸-异丙醇直接滴定法和两相滴定法分别测定烷基羧基甜菜碱样品中游离叔胺含量和活性物含量。结果表明,用盐酸-异丙醇直接滴定法测定游离叔胺,对双十二烷基甲基羧基甜菜碱样品滴定终点为浅黄色,与用标准盐酸溶液滴定单纯的叔胺产品相同,但对十六烷基二甲基羧基甜菜碱样品,滴定终点为蓝绿色而非黄色,以黄色为终点将高估叔胺含量。与滴定单纯的叔胺产品相比,大量甜菜碱的存在使滴定过程中pH的突跃消失,体系pH随滴定体积的增加缓慢下降,但滴定单位质量叔胺所消耗的盐酸-异丙醇的体积不变。由于指示剂颜色亦呈现缓慢的变化,仍可以根据指示剂颜色变化来确定终点。终点颜色不随叔胺含量而变化,但可能因甜菜碱的分子结构而异。在酸性条件下,叔胺与甜菜碱都显示阳离子性质,可以用两相滴定法测出两者总量。于是在用盐酸-异丙醇直接滴定法独立确定样品中游离叔胺的情况下,通过两相滴定即可测出样品中甜菜碱活性物含量。     

木钠改性高效减水剂的合成与效果评价

以正交试验考察了木钠改性减水剂的合成工艺,依据国标对其净浆流动度、坍落度损失等主要性能进行评价.木钠改性减水剂的最佳合成工艺:原料的摩尔比为n甲醛:n丙酮:n亚硫酸钠=2:1:0.7;反应前期温度控制在(58±2)℃,后期反应温度控制在(94±4)℃;保温反应3-4 h;木钠掺入量为5%.在最优反应条件下,合成产物具有...     

Effect of different aromatic amines on the crosslinking behavior and thermal properties of phthalonitrile oligomer containing biphenyl ethernitrile

To find a proper amine to promote the processability of phthalonitrile‐based composites, three different aromatic amines: 4‐aminophenoxyphthalonitrile (APN), 2,6‐bis (4‐diaminobenzoxy) benzonitrile (BDB) and 4,4′‐diaminediphenyl sulfone (DDS) were used as curing agents to investigate the crosslinking behavior and thermal decomposition behavior of phthalonitrile oligomer containing biphenyl ethernitrile (2PEN‐BPh). Differential scanning calorimeter (DSC) and dynamic rheological analysis were employed to study the curing reaction behavior of the phthalonitrile/amine blends and prepolymers. The studies revealed that BDB was the preferred curing agent and the preferred concentration of BDB was 3 wt %. The thermal properties of the 2PEN‐BPh polymers were monitored by TGA, and the results indicated that all the completely cured 2PEN‐BPh polymers maintained good structure integrity upon heating to elevated temperatures and these polymers could thermal stabilize up to over 550°C in both air and nitrogen atmospheres. Dynamic mechanical analysis (DMA) showed the glass transition temperature (T_g) exceeded 450°C when the 2PEN‐BPh polymer post cured at 375°C for 8 h. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

Preparation and Performance Evaluation of Fatty Amine Polyoxyethylene Ether Diethyl Disulfonate for Enhanced Oil Recovery in High‐Temperature and High‐Salinity Reservoirs

To enhance oil recovery in high‐temperature and high‐salinity reservoirs, a novel fatty amine polyoxyethylene ether diethyl disulfonate (FPDD) surfactant with excellent interfacial properties was synthesized. The interfacial tension (IFT) and contact angle at high temperature and high salinity were systematically investigated using an interface tension meter and a contact angle meter. According to the experimental results, the IFT between crude oil and high‐salinity brine water could reach an ultra‐low value of 10^?3 mN m^?1 without the aid of extra alkali at 90°C after aging. The FPDD surfactant has strong wettability alternation ability that shifts wettability from oil‐wet to water‐wet. The FPDD surfactant with a high concentration also has good emulsion ability under high‐temperature and high‐salinity conditions. Through this research work, we expect to fill the lack of surfactants for high‐temperature and high‐salinity reservoirs and broaden its great potential application area in enhanced oil recovery.     

水杨醛双Schiff碱仲胺配合物的合成及抗菌活性

本文采用分步法,首先合成了新的多齿Schiff碱仲胺配体N,N’-双(2－羟基苯甲醛仲胺基乙基)-2,6-吡啶二甲酰胺（L）,进一步合成了5个新的过渡金属配合物,再通过元素分析、红外光谱、紫外光谱及核磁共振等测试手段对配体及配合物进行了表征和合理的结构推测;并采取微量稀释法研究了它们对大肠杆菌的抑菌活性。结果表明：当配体与Co和Zn离子配位后,对大肠杆菌抑菌效果明显增强。     

Synthesis of rosin‐based imidoamine‐type curing agents and curing behavior with epoxy resin

Rosin is an abundantly available natural product. The characteristic fused ring structure of rosin acids is analogous to that of some aromatic compounds in rigidity, and makes rosin and its derivatives potential substitutes for those aromatic compounds. In the study reported, the synthesis of biobased curing agents containing imide structure using rosin and the cure reaction were investigated. Rosin‐based imidoamine‐type curing agents were synthesized, and the chemical structure was confirmed using ¹H NMR, Fourier transform infrared and electrospray ionization spectroscopy. The curing behavior with diglycidyl ether of bisphenol A epoxy was studied using differential scanning calorimetry. The thermal mechanical properties and thermal stability of the cured epoxy resins were evaluated using dynamic mechanical analysis and thermogravimetry, respectively. The results indicate that the curing behavior of the rosin‐based curing agents is similar to that of curing agents with analogous structures. Cured products have good thermal stability due to the presence of the imide group and the bulky hydrogenated phenanthrene ring structure. Rosin acids have a great potential in the synthesis of epoxy curing agents as replacements for some of the current commercial aromatic or cycloaliphatic analogues. Copyright © 2010 Society of Chemical Industry