双（N—苯基—3—咔唑基）甲苯碘盐的合成

双（Ｎ┐苯基┐３┐咔唑基）甲苯碘盐的合成李笃信＊郭自强兰卫东（山西大学化学系太原０３０００６）关键词苯基咔唑甲苯碘盐，有机光电导体，敏化剂，合成１９９７－１０－２７收稿，１９９８－０３－１３修回山西省自然科学基金资助项目有机光电导体简称ＯＰＣ，因其具...     

固体酸SO_4~（2－）／TiO_2－SiO_2对甲苯硝化的选择性催化作用

固体酸ＳＯ２－４／ＴｉＯ２－ＳｉＯ２对甲苯硝化的选择性催化作用阳年发（中山大学化学系，广州，５１０２７５）张春华（湘潭大学化学系，湘潭，４１１１０５）关键词甲苯，硝化，固体酸，选择性甲苯的位置选择性硝化一直是化学家们感兴趣的课题，为了提高甲苯－硝化产...     

改进的Gattermann-Koch反应

Gattermann-Koch 反应是实验室制备对-甲基苯甲醛(p-TAL)的常用方法。通常认为,氯化亚铜在反应体系中是一种必要的助剂,否则,常压下甲苯羰基化就无法进行。1979年,голубев曾不用氯化亚铜和氯化氢为助剂进行 Gattermann-Koch 反应。一年后,Toniolo 报道了以三氯化铝为催化剂,氯化亚铜-三苯基膦络合物为助剂的芳香烃羰基     

Vapour-liquid equilibria in nonpolar mixtures : II. Carbon tetrachloride with alkylbenzenes and n-alkanes at 313.15 K

Góral, M. and Zawadzki, S., 1993. Vapour-liquid equilibria in nonpolar mixtures. II. Carbon tetrachloride with alkylbenzenes and n-alkanes at 313.15 K. Fluid Phase Equilibria, 90: 355-364.

Total vapour pressure measurements using a modified static method at 313.15 K are reported for binary mixtures of CCl₄ with benzene, toluene, o-xylene, p-xylene, hexane, heptane, octane, nonane and decane. The results were correlated with the generalized Redlich-Kister equation for excess Gibbs energy. A comparison with literature vapour-liquid equilibrium data and excess enthalpy was made. Consistency within homologous series was checked. Predictions made using the UNIFAC method and the Hildebrand-Scatchard equation were compared.     

Metal - MoOx interaction and hydrodesulfurization activity of PdMo and PtMo catalysts

The ratios of the benzene/cyclohexane and of toluene/cyclohexane adsorption equilibrium constants were determined from the dehydrogenation rates of cyclohexane in its binary mixtures with benzene and toluene, respectively. The calculated adsorption constant ratios of toluene/benzene indicate a PdMo and a MoPt electron transfer. The opposite direction of the two electron transfers is compared with XPS and catalytic activity data.     

Partial molar volumes of organic solutes in water. X. Benzene and toluene at temperatures from (298 to 573) K and at pressures up to 30 MPa

Density data for dilute aqueous solutions of benzene and toluene are presented together with partial molar volumes at infinite dilution calculated from the experimental data. The measurements were performed at temperatures from (298.15 to 573.15) K and at pressures close to the saturated vapor pressure of water, at 30 MPa and at pressures between these limits. The data were obtained using a high-temperature high-pressure flow vibrating-tube densimeter.     

Co-Mo-P氧化物催化剂的甲苯选择性氧化制苯甲醛

研究了一系列铈钼磷复合氧化物对甲苯选择性氧化制苯甲醛反应的催化性能。实验表明：当Ce∶Mo∶P比为2∶1∶0.2、温度为485℃、空气/甲苯为10时，反应活性最好。采用了XRD、IR、UV-DRS、XPS和其他技术对催化剂样品的组成、结构、表面状态及性质进行了表征。     

Hydrophobic and charge-dipole interactions in aqueous solutions of highly charged metal chelate cations and nitrobenzene,dinitrobenzenes, and toluene at 25°C

Salting effects of metal chelate electrolytes Fe(phen)₃Br₂, Fe(bpy)₃Br₂, Co(phen)₃Br₂, Co(phen)₃Br₃, Co(en)₃Br₃, and Co(pn)₃Br₃ (where phen=1,10-phenanthroline, bpy=2,2-bipyridyl, en=ethylenediamine, and pn=1,2-propylenediamine) on the solubilities of nitrobenzene,o-,m-,and p-dinitrobenzenes (DNB), and toluene were studied in water at 25°C and compared to the results for sodium bromide and tetrabutylammonium bromide (Bu₄NBr). The Co(phen) ₃ ³⁺ , Fe(phen) ₃ ²⁺ , and Fe(bpy) ₃ ²⁺ ions showed much stronger salting-in effects than did the Bu₄N⁺ ion, while the effects of the Co(en) ₃ ³⁺ and Co(pn) ₃ ³⁺ ions are comparable with those of Bu₄N⁺. A great dependence of salting-in on the polarity of dinitrobenzene isomers was found for Co(phen) ₃ ³⁺ and Fe(phen) ₃ ²⁺ . The results were related to the partial molal volume of the respective cations. The very strong salting-in was considered to be mainly due to hydrophobic hydrations of the metal chelate cations and partly due to van der Waals interactions between the aromatic ligands and the nonelectrolytes. The small salting-in effects by Co(en) ₃ ³⁺ and Co(en) ₃ ³⁺ were interpreted in terms of hydrogen bonding between oxygen atoms of the nitro compounds or the solvent water molecules and hydrogen atoms attached to nitrogens in the complexes.     

CURE CHARACTERISTICS OF HYDROXYL TERMINATED POLYBUTADIENE PREPOLYMER WITH BLOCKED TOLUENE DIISOCYANATE-Ⅱ

Cure characteristics of hydroxyl terminated polybutadiene (HTPB) prepolymer with avariety of blocked toluene diisocyanate (TDI) in the presence of triethylamine (TEA) andchloroacetic acid catalyst are reported. Phenol, thiophenol, p-chloropheno1, p-nitrophenol,p-cresol, resorcinol, naphthols, caprolactam and butylated-hydroxytoluene were used as blockingagents. Viscosity measurements have been carried out using a mixture of HTPB and blocked TDIin cyclohexanone in the presence of the catalysts at 50℃ and 60℃ using Haake rotational vis-cometer. Viscosity measurements have also been carried out with 50% solids such as ammonium sulphate along with HTPB and TDI adduct.     

Fenton试剂增强电晕放电技术降解甲苯

通过气溶胶分散技术将芬顿(Fenton)试剂引入气相反应体系来增强电晕放电对污染物甲苯的降解.含Fe2 、Co2 和Mn2 等过渡金属离子的催化剂溶液以微液滴形式添加入反应器电晕区,考察了催化剂对甲苯蒸气降解速率的影响,发现甲苯平均降解速率均有显著提高.在这三种金属离子溶液浓度均为0.05mol/L,电极气流量为0.6m3/h和极间电压为23kV时,甲苯(初始浓度为900mg/m3)降解速率增强因子β分别为1.29,1.28和1.51.气相和液相中降解产物的分析表明,微液滴内发生的电Fenton反应将电晕放电产生的H2O2转化为具有更强氧化性的羟基自由基(HO.),而甲苯的中间产物溶解在微液滴中,增强了甲苯的降解速率.