支撑液膜法提取稀土的动力学

研究了以聚丙稀为支撑膜，以二（２－乙基已基）磷酸为载体提取稀土的支撑液膜体系。通过实验确定为料液的ｐＨ值，载体浓度等与稀土离子渗透系数之间的关系；建立了动力学方程；并计算了料液－膜侧传质边界层的厚度和稀土配合物在膜内的扩散系数。     

卷烟纸参数对细支卷烟主流烟气常规化学成分和香味成分释放量的影响

为研究卷烟纸参数对细支卷烟主流烟气化学成分释放量的影响,通过单因素实验考察了卷烟纸透气度、定量,及麻浆和碳酸钙质量分数对细支卷烟主流烟气常规成分和香味成分释放量的影响。结果表明:(1)当透气度从50 CU增加至70 CU时,水分、CO和各种香味成分的释放量,香味成分的释放总量及其单位焦油释放量均降低。(2)当定量从27 g/m~2增加至37 g/m~2时,抽吸口数减少,TPM和水分的释放量均降低,CO的释放量增加;各种香味成分释放量及香味成分释放总量均降低,香味成分的单位焦油释放量降低。(3)当麻浆质量分数从0增加到40%时,TPM、水分、焦油及CO释放量均降低;各种香味成分的释放量及香味成分释放总量均小幅降低,香味成分的单位焦油释放量无明显变化。(4)当碳酸钙质量分数从27%增加到33%时,TPM、水分及焦油释放量降低,CO释放量小幅降低,各种香味成分的释放量及香味成分释放总量均小幅降低,香味成分的单位焦油释放量增加。     

Kinetics Study on the Thermal Decomposition of Europium p-methyl benzoate Complex with 1, 10-penanthroline under Non-isothermal Con ditions

The thermal decomposition reaction of Eu2(p-MBA)6(PHEN)2 (p-MBA=CH3C6H4COO, methylbenzoate;PHEN=C12H8N2, 1,10-phenanthroline) was studied in a static atmosphere usingTG-DTG method. The thermal decom position process of the complex was determined and its kinetics was investigated. Kinetic parameters were obtained from the analysis of TG-DTG curves by means of the Achar method and the Madhusudanan-Krishnan-Ninan (MKN) method.The most probable mechanism functions of the thermal decomposition reaction for the first stage are: f(α)= (1-α)2,g(α) = (1 -α) 1- 1. The activation energy for the first stage is 255.18 k J/mol, the entropy of activation AS is 227.32 J/mol and the Gibbs free energy of activation AG is 128.04 k J/mol.     

储能钒液流电池研发热点及前景

介绍了全钒离子氧化还原液流电池(钒液流电池,VRB)的特点,它的关键材料,如电解液、集流体、电极材料以及隔膜等的研究现状和制约难点.对钒液流电池作为储能系统的发展作了分析;就钒液流电池的发展趋势进行了展望.     

Syntheses, characteristics and fluorescence properties of complexes of terbium with benzoic acid and its derivatives

The binary complexes of terbium with benzoic acid and its derivatives (phthalic acid, iso-phthalic acid, oaminobenzoic acid, salicylic acid, sulfosalicylic acid) were synthesized and their compositions were identified by elemental analyses. UV, IR of the complexes were investigated. The UV spectra indicate that the complexes‘ ultraviolet absorption is mainly the ligands‘ absorption, but the location of peak drifts. The IR spectra show that the IR spectra of complexes are different from those of free ligands, and the band at 400 - 500 cm^-1 , due to the stretching vibration of Tb--O, is absent for free ligands. The fluorescence properties were investigated by using luminescence spectroscope, the results show that all the six complexes of terbium exhibit excellent luminescence, due to the transition from the lowest excited state ^5D4 to ^7F ground state manifold, the complexes of terbium with sulfosalicylic acid have the strongest fluorescence intensity, and is stronger than o-aminobenzoic acid-terbium, whose fluorescence intensity is regarded as the strongest one in the literature, and even stronger than some phosphor of terbium.     

富氧功能化超交联树脂的合成及其对苯胺的吸附

有机化工废水中典型的有机污染物,如苯胺、苯酚等,具有高毒性、易生物富集、难生物降解等特质,不仅对人体健康造成不利影响,还会引起严重的环境污染。因此,从水中高效地去除有机污染物迫在眉睫。超交联树脂对有机污染物具有较高的吸附容量及优异的吸附选择性,开发具有高表面积和丰富官能团的功能化超交联树脂有一定的学术价值和广阔的应用前景。本文以氯甲基化聚苯乙烯为前体,3,5-二甲基苯酚为功能单体,甲缩醛为外加交联剂,通过亲核取代反应和Friedel-Crafts烷基化反应,合成了富氧功能化超交联树脂。结果表明,富氧功能化超交联树脂拥有较高的氧含量[8.67%(质量)]、较大的比表面积（198 m²/g）和丰富的微孔（微孔面积占总比表面积的36.3%）,300 K下对苯胺的平衡吸附量达156.4 mg/g。树脂对低浓度的苯胺有优秀的吸附效率,达到国家一级排放标准（<1.0 mg/L）,且具有优良的循环使用性能。     

Fluorescence properties and application of doping complexes Eu1-xLx (TTA)3Phen as light conversion agents

Light conversion agents Eu1-x Lx (TTA)3 Phen (L denotes La3+ , Gd3+ , Y3+ ) complexes were prepared,and the influence of doping ions on fluorescence properties was investigated by elementary analysis, FTIR and fluorescent spectra. The results show that FTIR spectra of Eu1_x Lx (TTA)3 Phen complex system are identical with that of EuTTA3 Phen, which indicates that the complexes Eu1 xLx(TTA)3Phen are similar in structure to Eu (TTA)3Phen. For the above doping elements, co-fluorescence enhancement has the following order: Gd3+ ＞Y3+ ＞La3+ , and the optimum mole fractions of doping elements are 0.4, 0.2 and 0.5 respectively for Gd3+ , Y3+ ,La3+. Among all the complexes, Eu0.6 Gd0.4 (TTA)3 Phen complex has the strongest fluorescent intensity. Applying Eu0.6 Gd0.4 (TTA)3 Phen complex to plastic and printing inks, bright red fluorescence plastic and printing inks are obtained when the content of europium reaches 0.1% (mass fraction).     

固体酸化焙烧-水浸提铟的研究

对含铟废渣进行了固体酸化焙烧－水浸提铟的条件试验。考察了焙烧温度,焙烧时间,固体酸用量,浸出液固比等对铟废渣中铟浸出率的影响。焙烧温度,固体酸用量对铟浸出率有显著影响,其它条件影响不大。     

二氯二茂钛的合成及其对SBS加氢催化性能的研究

以二聚环戊二烯(dicyclopentadiene)为原料,将其裂解得到环戊二烯(cyclopentadiene,Cp);在二乙胺存在的条件下将其与四氯化钛反应,合成了二氯二茂钛(titanocene dichloride,TDC),并以合成的目标产物作为丁苯嵌段共聚物(SBS)加氢催化剂,对其催化性能进行了研究。当加氢反应温度为70℃,压力为2.0MPa,催化剂用量为0.4mmol/100g聚合物时,SBS中加氢度达到94.2%。说明目标产物具有良好的催化性能。     

Synthesis and application of antimony pent（isooctyl thioglycollate）

A new type of thermal stabilizer, antimony pent (isooctyl thioglycollate) (Sb(SCH2 COOC8 H17 )5), was synthesized by using antimony trioxide, isooctanol and thioglycolic acid in 2 steps. Firstly, antimony trioxide was oxidized into colloidal antimony peroxide. Then antimony peroxide and isooctyl thioglycollate reacted stoichiometrically for 2 h with the yield of 87%. This compound was used as thermal stabilizer for polyvinyl chloride(PVC).The results show that the thermal stability time is 52 rain at 200℃ by heat-ageing oven test when adding 2. 5% thermal stabilizer to PVC resin. Compared with antimony tris(isooctyl thiolycollate), the initial thermal stability of antimony pent(isooctyl thioglycollate) is better than that of antimony tris(isooctyl thioglycollate), while the longterm thermal stability time is shorter than that of antimony tris(isooctyl thioglycollate). Meanwhile, the synergism of antimony pent(isooctyl thioglycollate) with calcium stearate was studied, indicating that when the mass ratio of antimony pent(isooctyl thioglycollate) to calcium stearate is 2:1, the thermal stability time of PVC is 58 min.