MCB—I保险粉反应工序微机监控系统

本文介绍以８０３１单片机为核心，用ＰＩ调节法监控反应温度和ＰＨ值及反应终止的保险粉反应工序的微机监控系统。

磷酸装置反应槽与搅拌器和过滤机

对任一已定的磷酸装置P2O5收率主要取决于磷矿在反应槽内的溶解效率（在二次结晶装置中也较少取决于再结晶槽的溶解效率）以及与过滤机（或两次结晶装置过滤机）上硫酸钙的分离效率有关。因此这些设备的设计和布置是至关重要的。特别是对反应槽而言,实际上它是工艺设计本身特定的一部分。磷酸装置反应槽全是专制的,不象泵、阀门之类可从预制规格中选用。同样。

薄膜的制造方法及溅射装置

本发明提供简单易行的制造膜厚倾斜程度大的薄膜的薄膜制造方法及溅射装置。该方法通过使真空室内的成膜工序区和反应工序区在空间上相互分离并通过溅射形成薄膜。在中间薄膜形成工序形成由不完全反应物形成的中间薄膜。该中间薄膜形成工序中，在基板S和靶之间设有使形成的薄膜膜厚均匀的修正板和使形成的薄膜具备对应基板S形成薄膜的面的所需膜厚分布的屏蔽板，在基板S相对修正板和屏蔽板移动的同时形成中间薄膜。在形成最终薄膜的膜组成转化工序中，在反应工序区使中间薄膜和反应性气体的活性基反应，使最终薄膜的膜厚与中间薄膜的膜厚相比有所增加。

专利摘登

抗老化的常压阳离子染料可染聚酯的制备方法 这种抗起球、抗老化、常压阳离子染料可染聚酯的制备方法包括下述工序：第1次酯化反应工序,酯交换反应工序,第2次酯化反应工序,缩聚反应工序。在酯交换反应工序中加入第三组分。在第2次酯化后,预缩聚反应前,

Comparison of heavy metal removal efficiencies in four activated sludge processes

The removal efficiencies of heavy metals(As, Cr, Cu, Ni, Pb and Zn) were investigated in the 17 operating municipal wastewater treatment plants(WWTPs) and compared with those in four main activated sludge processes. Significant differences of heavy metal removal efficiencies were observed among four activated sludge processes. The removal efficiency for As(75.5%) in the oxidation ditch(OD) process is significantly higher than that in the conventional activated sludge(CAS) process(38.6%) or sequencing batch reactor(SBR) process(51.4%). The mean removal efficiencies for Cu and Ni in the OD process are 90.5% and 46.7%, respectively, while low mean removal efficiencies are observed for Cu(69.9%) and Ni(16.5%), respectively, in the SBR process. The removal efficiencies for Cu and Ni in the OD process are significantly higher than those in the anaerobic-anoxic-oxic(A2-O) process. These results highlight the differences of removal efficiencies for heavy metals in different processes and should be considered when selecting a wastewater treatment process.

Aluminum impregnated silica catalyst for Friedel–Crafts reaction：Influence of ordering mesostructure

Friedel–Crafts alkylation of benzene with linear chain ole fin(C_(10)–C_(14)),which is an important reaction of synthetic detergent,was studied via different catalysts of aluminum impregnated silica molecular sieves.AlCl_3 was immobilized on silica molecular sieves with different channel structures,hexagonal packing channels network(SBA-15,MCM-41),and disordered channel network(SiO_2,SiO_2-Gel) by impregnation.XRD and N_2 adsorption–desorption isotherms con firmed that the speci fic mesoporous structures were maintained for order channel network catalyst after impregnation.Catalytic activities were investigated under different conditions.The in fluences of channel structure were discussed.The results showed that catalyst based on mesoporous like SBA-15 had the highest catalytic activities and 2-LAB selectivity compared with other catalysts in this work.The highest 2-LAB selectivity was nearly 50% when 1-dodecene conversion was nearly 100%.At low 1-dodecene conversion or higher benzene/1-dodecene molar ratio,2-LAB selectivity was nearly 60%.

On-line Monitoring for Phosphorus Removal Process and Bacterial Community in Sequencing Batch Reactor

For efficient energy consumption and control of effluent quality, the cycle duration for a sequencing batch reactor (SBR) needs to be adjusted by real-time control according to the characteristics and loading of waste-water. In this study, an on-line information system for phosphorus removal processes was established. Based on the analysis for four systems with different ecological community structures and two operation modes, anaerobic-aerobic process and anaerobic-anaerobic process, the characteristic patterns of oxidation-reduction potential (ORP) and pH were related to phosphorous dynamics in the anaerobic, anoxic and aerobic phases, for determination of the end of phosphorous removal. In the operation mode of anaerobic-aerobic process, the pH profile in the anaerobic phase was used to estimate the relative amount of phosphorous accumulating organisms (PAOs) and glycogen accumulat-ing organisms (GAOs), which is beneficial to early detection of ecology community shifts. The on-line sensor val-ues of pH and ORP may be used as the parameters to adjust the duration for phosphorous removal and community shifts to cope with influent variations and maintain appropriate operation conditions.

The applications of hypervalent iodine(Ⅲ) reagents in the constructions of heterocyclic compounds through oxidative coupling reactions

Hypervalent iodine(Ⅲ)reagents have been vastly used in many useful organic transformations.In this review article,we highlight the strategies that used the common hypervalent iodine(Ⅲ)reagents as oxidants to synthesize the heterocyclic compounds,based on the patterns of bond formation during the construction of the heterocyclic backbones.