A new class of corrosion inhibitors for waterborne coatings: 4-methyl-γ-oxo-benzene-butanoic acid complexes

Amine and transition metal based complexes with 4-methyl-γ-oxo-benzene-butanoic acid represent a new class of corrosion inhibitors specifically designed for long-term corrosion protection in waterborne coatings. Today, corrosion protection in waterborne technology is typically achieved using traditional anticorrosive pigments initially developed for use in solventborne coatings. Regulations concerning heavy metals and limitations regarding the compatibility and performance of such materials in waterborne coatings have created a need for novel approaches. Mechanistic aspects are discussed for the 4-methyl-γ-oxo-benzene-butanoic complexes based on electrochemical solution experiments (electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV)) and investigations performed on coated substrates. Exposure results underline the high efficiency of such complexes for both long-term corrosion protection and weld seam rust control in waterborne coatings.     

微晶纤维素增粘剂的研制

以棉浆为原料，废盐酸为水解催化剂，所得合成革用微晶纤锥素增粘剂的质量指标达到了德国和日本同类产品的标准。     

强化两相混合的超临界技术制备聚乳酸微粒

针对商品化聚乳酸微球粒径分布较宽难于适用气溶胶给药要求的不足,采用水力空化混合强化超临界流体辅助雾化技术(SAA-HCM)制备聚乳酸(PLA)超细微粒.该技术主要特点是通过在超临界流体和液相进料处引入水力空化混合器,强化两相间的混合.考察SAA-HCM过程混合器压力、温度、沉淀器温度、进料中CO2与液体溶液质量流量比和溶液质量浓度等操作参数对微粒形态和粒径分布的影响,成功制备出球形度较好,粒径分布较窄(1～3μm)的PLA微球.经X射线衍射(XRD)分析和差示扫描量热(DSC)分析显示,与原料PLA相比,微球晶型及热曲线变化不大,但结晶度下降.同时把操作参数与相行为进行关联,探讨了影响颗粒形貌的机理.对比超临界流体辅助雾化法(SAA)的实验结果表明:水力空化的引入能有效强化混合器内的两相传质,混合更好,能制备出适用于气溶胶给药要求的超细微粒.     

XRQ-Ⅱ型开车燃烧控制系统的结构及应用

XRQ-Ⅱ型开车燃烧控制系统由泵组、阀组、燃烧器、快速关断阀门及控制柜等组成,燃料经油枪喷嘴雾化喷出在燃烧器中安全稳定地燃烧,控制柜保证供油及点火、火焰检测.在600 kt/a硫磺制酸系统焚硫炉烘炉及催化剂升温中的实际应用表明,XRQ-Ⅱ型开车燃烧控制系统具有便于自控操作、提高焚硫炉烘炉内衬质量、缩短催化剂升温时间等优点.     

230 kt/a烟气制酸系统的运行及改造情况

介绍230kt／a诺兰达炉铜冶炼烟气制酸装置的运行及技术改造。装置采用稀酸洗净化、ⅣⅠ-Ⅲ Ⅱ“3 1”两转两吸工艺流程，运行中发现板式酸冷却器堵塞、电除雾器腐蚀、气体换热器积酸和漏气等现象，通过更换为阳极保护管壳式酸冷却器、在电除雾器前增设湍冲洗涤器、调整换热管的喷铝成分等措施，收到良好的效果。     

阳离子交换树脂催化合成十三碳二元酸二乙酯

以强酸性阳离子交换树脂为催化剂,十三碳二元酸与乙醇为原料合成十三碳二元酸二乙酯,考察了影响反应的因素。结果表明:醇酸摩尔比为4∶1,催化剂用量为酸质量的2%,在3分子筛脱水的情况下反应7 h,酯化率达98.4%,并且催化剂可重复使用3次。     

Boronic acid-functionalized nanoparticles: synthesis by microemulsion polymerization and application as a re-usable optical nanosensor for carbohydrates

Translucent boronic acid-carrying nanolatexes are prepared by copolymerisation of vinylbenzyl chloride in microemulsion followed by post functionalisation with 3-aminophenylboronic acid. The diol binding capacity and selectivity of the phenylboronic acid remain unchanged after anchoring to polymer nanoparticles (16 nm diameter, 0.22 mmol/g). The binding of a catechol dye, Alizarin Red S (ARS), to the boronic acid-carrying nanoparticles affords a colored, stable, nanolatex which is used for the selective visual detection of fructose in a competitive assay. The binding of fructose at pH 8.2 is readily evidenced by a color change and monitored by UV/Vis spectroscopy. The nanosensor can be regenerated in acidic medium. The entrapment of the nanolatex in a dialysis cell provides a re-usable support for binding and optical detection.     

三氯异氰尿酸生产技术研究

对三氯异氰尿酸合成反应过程中的主要工艺参数进行分析和实验研究,并成功地开发出了连续法生产三氯异氰尿酸的新工艺,该工艺和传统工艺相比,具有生产安全、高效、节能的特点。     

硝硫混酸与Ag、Cu反应的动力学

用失重法探讨了硝硫混酸此例、浸出温度和时间等因素对银的溶解和铜的钝化的影响。结果表明:在一定的[HNO_3]范周内,较高温度时,银的溶解符合一级反应规律;求得银的溶解量与时间、HNO_3起始浓度等的关系式和相应的反应活化能;铜在此条件时是钝化的。本实验再一次证实了银的溶解和铜的钝化机理的正确性,也为银、铜的分离提供了实验依据。     

易门铜业公司18kt／a粗铜及硫酸车间的技改工程

介绍了易门铜冶炼厂烟气制酸系统的技术改造工程.从工艺流程、设备复核、工艺参数、设备配置等方面阐述了技改的过程.