Papers by Keyword: Catalyze

Abstract: With Raney nickel catalyst, the process of catalytic hydrogenation of isophthalonitrile for meta-xylenediamine preparation using aniline as the solvent is studied in this paper. The effect of the amount of catalyst, the reaction pressure and temperature is discussed. The results show that: on the conditions of the initial raw materials concentration for 2.0mol/L, the ratio of the catalyst quality and the IPN quality for 1/10, the reaction temperature for 100°C, the reaction pressure for 35bar, the reaction inhibitor NaOH for 0.6g and some additives, the reaction is conducted for 80min and the quality yield of meta-xylenediamine is up to 98.58%.

Abstract: Coking wastewater is a kind of recalcitrant wastewater including complicate compositions. Advanced treatment of coking wastewater by Fenton-Like reaction using pyrite as catalyst was investigated in this paper. The results show that the chemical oxygen demand (COD) of coking wastewater decreased significantly by method of coagulation combined with two-stage oxidation reaction. COD of wastewater can decrease from 250mg/l to 45mg/l after treatment, when 2g/L pyrite was used in each stage oxidation and the dosage of hydrogen peroxide (H₂O₂) is 0.2ml/l for first stage treatment, 0.1ml/l for second stage treatment respectively. The pyrite is effective to promote Fenton-Like reaction with low cost due to high utilization efficiency of H₂O₂, moreover, catalyst could be easily recovered and reused. The Fenton-Like reaction might be used as a potential alternative to advanced treatment of recalcitrant wastewater.

Abstract: In order to prepare new functional macromolecule material, the coupling reaction of acenaphthene catalyzed by [Bmim]Cl/FeCl3 ionic liquid was investigated under mild reaction conditions and without any additional organic solvent. Pure 3,3’-biacenaphthene, which is used as intermediate of function aromatic polymer material, was obtained by recrystalling and column chromatography from the reaction mixture and was determined by GC/MS, 1HNMR and FTIR analysis. The influence of various reaction conditions on the coupling reaction of acenaphthene were studied by GC analysis and the optimum synthesis conditions of the reaction were obtain. Under optimun conditions, the yield of 3,3’-biacenaphthene will be 63.5 % and selectivity of that will be 85.6 %. Further more, [Bmim]Cl/FeCl3 is environmentally benign catalyst and solvent and can be reused.

Abstract: MgO nanowires combined with C nanotubes have been prepared through method of high-temperature catalytic reaction. The nanostructures consist of nanowires that have right-angled zigzag manner to elongate in three dimensions. Structural characterization and elemental composition analysis identified that the nanowires were made of MgO nanowires combined with C nanotubes. A growth mechanism based on the vapor-liquid-solid (VLS) process is proposed for the formation of the combined nanostructures. With the aid of XRD, SEM, HRTEM and EDS, the morphology, structure and growth mechanism were investigated.