Measurements of the Critical Temperature and Pressure of Ethylene+Benzene+Ethylbenzene Mixture

Critical temperature (Tc) and critical pressure (pc) of the ternary mixture of ethylene + benzene + ethylbenzene (the mole ratio of ethylbenzene to benzene was fixed at 0.95:0.05) were measured by using a high-pressure view cell with direct visual observation. The interaction coefficients obtained from the critical properties of the relevant binary systems were used to predict the critical properties (Tc, pc) of the ternary mixture. The agreement between the prediction and experiments is satisfactory.     

Is competition between Li+ and Mg2+ the underlying theme in the proposed mechanisms for the pharmacological action of lithium salts in bipolar disorder?

Lithium salts have been in use for the treatment of bipolar disorder for more than 50 years, but their pharmacological mode of action remains a matter of conjecture. Li(+) and Mg(2+) share many physicochemical properties. Not surprisingly, many reported cellular targets for Li(+) action involve Mg(2+)-activated enzymes, which are inhibited by Li(+). In this Account, we describe results from our and other laboratories that suggest that a competition mechanism between Li(+) and Mg(2+) ions for Mg(2+)-binding sites in cellular components is the underlying theme in putative mechanisms of Li(+) action.     

Experimental results for the vapor–liquid equilibria of (formaldehyde+1,3,5-trioxane+methanol+salt+water) systems and comparison with predictions

The salt effect on the vapor–liquid phase equilibrium (VLE) of solvent mixtures is of significant interest in the industrial production of 1,3,5-trioxane. Experimental data for the VLE of quinary systems (formaldehyde + 1,3,5-trioxane + methanol + salt + water) and their ternary subsystems (formaldehyde+salt+water), (1,3,5-trioxane+salt+water), and (methanol+salt+water) were system-atic measured under atmospheric pressure. The salts considered included KBr, NaNO3, and CaCl2. The extended UNIFAC model was used to describe the VLE of the salt-containing reactive mixtures. The model parameters were determined from the experimental VLE data of ternary systems or obtained from the literature, and then were used to predict the VLE of systems (1,3,5-trioxane + KBr + water), (methanol+KBr+water), (formaldehyde+KBr+water), and (formaldehyde+1,3,5-trioxane+methanol+salt+water) with salt=KBr, NaNO3, and CaCl2. The predicted results showed good agreements with the measured results. Furthermore, the model was used to uncover the salt effect on the VLE of these multi-solvent reactive systems.     

Influence of the melting temperature and rate of cooling the melt to the glass making temperature on the redox equilibria Fe2+ ? Fe3+ and Cu+ ? Cu2+ in aluminum potassium barium phosphate glasses

This paper reports on the results of the investigation of aluminum potassium barium phosphate glasses that contain copper and iron additives and have compositions similar to the composition of the matrix of the KGSS 0180/35 neodymium phosphate glass used for fabricating large-sized active elements intended for high-power laser amplifiers with a high output energy. The redox equilibrium of iron ions has been studied as a function of the melting temperature of the glass (850, 1100, and 1300°C). The redox equilibrium of iron or copper ions and their contributions to the nonactive absorption coefficient of glasses prepared at the melting temperature (1100°C) or after cooling of the glass melt at different rates to the glass making temperature (850°C) have been investigated. It has been established that a decrease in the melting temperature of the glass leads to a shift in the redox equilibrium of iron ions toward the formation of Fe³⁺ ions. During cooling of the glass melt from 1100 to 850°C, the redox equilibrium of copper (iron) ions shifts toward the formation of Cu²⁺ (Fe³⁺) ions; in this case, the lower the rate of cooling the melt, the larger the shift. At the minimum rate of cooling the glass melt (250°C for 180 min), the contribution of copper ions to the nonactive absorption coefficient increases by 25%, whereas the corresponding contribution of iron ions decreases by 40%.     

Salt effect on the liquid–liquid equilibrium of the ternary (water + phenol + methyl isobutyl ketone) system: Experimental data and correlation

The effects of NaCl, KCl and Na_2SO_4 on the liquid–liquid equilibrium(LLE) data for the ternary system, water+ phenol + methyl isobutyl ketone, were determined at 0.101 MPa and 333.15 K and 343.15 K.The nonrandom two-liquid(NRTL) model was used to correlate the experimental data and to yield corresponding binary interaction parameters for these salt containing systems.The Hand and Othmer–Tobias equations were used to confirm the dependability of the determined LLE data in this work.Distribution coefficient and selectivity were used to evaluate the extraction performance of methyl isobutyl ketone with the existence of salt.The magnitude of salt effect on the water + phenol + methyl isobutyl ketone(MIBK) system is in the following order: Na_2SO_4NaClKCl.     

乙醇+丁醇+辛烷+壬烷+水+十四烷液液相平衡研究

针对乙醇水溶液萃取丁醇+辛烷+壬烷混合物后的萃取相中残留的辛烷和壬烷,提出了使用十四烷作为反萃剂对萃取相进行反萃,测定了常压、298.15K下乙醇+丁醇+辛烷或壬烷+水+十四烷五元体系和乙醇+丁醇+辛烷+壬烷+水+十四烷六元体系的液液相平衡数据.使用Othmer-Tobias方程检验了液液相平衡数据的准确性,线性相关系...     

德化 绿色+低碳+新工艺

3月17日,欧盟做出了对中国瓷砖的反倾销制裁,1500家中国陶瓷企业被征收高达73%的临时惩罚性关税,半年后将公布终裁结果。据了解,本次欧盟反倾销调查涉及的中国陶企大多集中在佛山,据德化县经贸局有关部门透露,此次反倾销中,德化县陶瓷业并未受到正面冲击,涉及的1500家中国陶瓷企业中,没有一家是德化陶瓷企业。     

雕塑家+建筑师+铁丝=?

“一位雕塑家＋一位建筑师＋一些铁丝”这个奇妙的组合究竟能幻化出什么呢？梦幻、浪漫、性感？还是闪烁在第76届奥斯卡电影金像奖颁奖大厅上空的摇曳身姿？     

A comparative study of the magnetic and microwave properties of Al3+ and In3+ substituted Mg–Mn ferrites

The effect of substitution of diamagnetic Al³⁺ and In³⁺ ions for partial Fe³⁺ ions in a spinel lattice on the magnetic and microwave properties of magnesium–manganese (Mg–Mn) ferrites has been studied. Three kinds of Mg–Mn based ferrites with compositions of Mg_0.9Mn_0.1Fe₂O₄, Mg_0.9Mn_0.1Al_0.1Fe_1.9O₄, and Mg_0.9Mn_0.1In_0.1Fe_1.9O₄ were prepared by the solid-state reaction route. Each mixture of high-purity starting materials (oxide powders) in stoichiometric amounts was calcined at 1100 °C for 4 h, and the debinded green compacts were sintered at 1350 °C for 4 h. XRD examination confirmed that the sintered ferrite samples had a single-phase cubic spinel structure. The incorporation of Al³⁺ or In³⁺ ions in place of Fe³⁺ ions in Mg–Mn ferrites increased the average particle size, decreased the Curie temperature, and resulted in a broader resonance linewidth as compared to un-substituted Mg–Mn ferrites in the X-band. In this study, the In³⁺ substituted Mg–Mn ferrites exhibited the highest saturation magnetization of 35.7 emu/g, the lowest coercivity of 4.1 Oe, and the highest Q×f value of 1050 GHz at a frequency of 6.5 GHz.     

曝气气浮+ASBR+SBR+Fenton+混凝沉淀处理化学储运废水

针对某企业运营的化学储运废水,采用"曝气气浮+ASBR+SBR+Fenton氧化+混凝沉淀"工艺进行废水处理。工程运行结果表明,出水水质能稳定达到广东省水污染物排放限值(DB44/26-2001)第二时段一级排放标准要求,实际运行成本为4.61元/m^3,实现了化学储运废水稳定达标排放。     

混凝预处理+UASB+ABR+A/O+气浮工艺处理原料药废水

针时原料药废水的有机污染物和悬浮物浓度都较高的水质,部分车间的COD高达25 000mg·L-1,ρ(SS)高达10 000 mg·L-1的特点,采用混凝预处理+上流式厌氧污泥反应器(UASB)+厌氧折流板反应器(ABR)+A/O池+气浮处理工艺对江西某制药有限责任公司废水进行了处理.系统运行结果表明:其出水各项指标均...     

预处理+厌氧+生化+膜深度处理垃圾焚烧厂渗滤液

以华北地区某一生活垃圾焚烧发电厂渗滤液项目为例，采用“预处理+厌氧+一级AO+UF+NF+RO”工艺处理，出水水质满足《城市污水再生利用工业用水水质》(GB/T 19923—2005)中敞开式循环冷却系统补充水标准后回用至冷却塔循环水。NF浓液采用物料膜减量化处理，RO浓液采用二级RO处理，最终浓液入炉回喷或至主厂区综合利用。经调试运行，本项目系统整体得率≥80%,COD、NH₃-N、TN去除率分别为99.97%、99.96%、99.90%，出水水质达标排放。     

隔油+气浮+过滤+吸附工艺处理机械工业含油废水

采用"隔油+气浮+过滤+吸附"工艺处理机械工业含油废水.处理效率高.运行成本低.运行结果表明,采用该工艺处理后废水COD、石油类的去除率分别为81%和99%,处理后出水回用于冲刷地面、洗车、绿化、景观用水,同时浮油回收利用,创造了显著的经济效益、环境效益和社会效益.     

UASB+CASS+FENTON+BAF处理红霉素废水工程实例

针对红霉素生产废水成分复杂、悬浮物(SS)含量高、有机物含量高、含有生物抑制性物质、生物降解性不好的特点,采用"UASB(上流式厌氧污泥床)+CASS(循环式活性污泥法)+FENTON氧化+BAF(曝气生物滤池)"的组合工艺进行治理。调试运行结果表明,经该工艺处理后,废水COD由4500~5000mg/L降至30~40mg/L,氨氮(NH3-N)由300~500mg/L降至2~3mg/L,悬浮物(SS)由800~1000mg/L降至5~10mg/L,达到《山东省南水北调沿线水污染物综合排放标准》(DB37/599-2006)重点保护区修改单通知的排放标准。     

水解酸化+IC+CASS+BAF处理白酒废水工程

分析了目前白酒废水处理工艺,对运用"水解酸化+IC+CASS+BAF"工艺处理白酒废水实际工程效果进行了介绍和分析,运行结果表明,出水可达到《发酵酒精和白酒工业水污染物排放标准》(GB 27631-2011)表2中新建企业水污染物排放限值,且IC工段是该工艺的关键。     

预处理+EGSB+CASS+气浮处理木糖废水工程实例

介绍了河南某木糖生产企业的废水处理工程。该工程采用污污分流,经"预处理+EGSB+CASS+气浮"工艺处理高浓度硫酸盐木糖废水。运行实践表明,工艺运行稳定,经济可行。当综合进水COD4 000 mg/L、BOD51 500mg/L、硫酸盐1 200 mg/L时,出水可达到《污水综合排放标准》(GB 8978—1996)的二级标准。     

Effect of Er3+ substitution on the quality of Mg–Fe spinel pigments

Inorganic pigments containing erbium cations and based on the spinel structure of MgFe₂O₄ were prepared. This type of spinel compound provides pigments of red to brown colour; an increase in the content of trivalent erbium cations results in pigments of a light brown hue. The pigments displayed good resistance to sunlight but this was reduced as the content of erbium increased. Pigments prepared using mechanoactivation possessed good resistance to sunlight over a range of erbium cation content.     

预处理+UASB+MBR+NF+RO组合工艺处理垃圾发电厂渗滤液工程实践

某城市生活垃圾焚烧发电厂一期垃圾渗滤液处理站设计处理规模为180 m~3/d,采用混凝等预处理+UASB+MBR+NF+RO组合工艺,出水水质要求达到《城市污水再生利用工业用水水质》(GB/T 19923—2005)中敞开式循环冷却水补充水的水质标准。结果表明,常年平均出水COD_(Cr)≤29 mg/L,BOD_5≤5 mg/L,NH_3-N≤0.4 mg/L,TN≤14 mg/L,SS未检出,完全满足出水水质要求。文中介绍了渗滤液处理系统的工艺流程、主要构筑物和设备的设计参数,并对运行成本及经验进行了总结,可供同类工程设计参考。