Papers by Keyword: Ethylenediamine

Abstract: In this work, imidazoline-oleic derivative had been successfully synthesized by reacting ethylenediamine (EDA) with oleic acid (OA). The synthesis process was performed with MAOS (Microwave Assisted Organic Synthesis) and the conventional method (reflux with Dean-Stark) using xylene as a solvent was also performed as comparisons. The percentage yield of EDA-OA imidazoline was obtained from Reflux with Dean-Stark at 5 hours (90 %), and MAOS at 10 min (68,2 %). EDA-OA imidazoline then was identified by using thin-layer chromatography, and the separation method by KVC with eluent CHCl₃: MeOH (9:1) with ammonium solution followed by characterization using Fourier Transform Infrared (FTIR), UV-Vis, Proton Nuclear Magnetic Resonance (¹H-NMR). This study provides information regarding the comparison method for imidazoline derivative synthesis. For further research, EDA-OA imidazoline can be used as a corrosion inhibitor towards carbon steel.

Abstract: The processing of the light fraction formed during the separation of amines for components by rectification is investigated. The light fraction which is an aqueous solution with about 1% of ethylenediamine and 2% of ammonia is treated in an electrolyzer with ion-exchange membranes. It is shown that a concentrated product containing about 118 g/l of ethylenediamine, about 106 g/l of ammonia and purified water can be obtained in this case. The concentrated product can be used at the initial stage of amines production.

Abstract: This work aim to functionalize the ZnAl_1.9Eu_0.1O₄ spinel with ethylenediamine and methylmethacrylate monomer mixtures. ZnAl_1.9Eu_0.1O₄ nanoparticles were obtained according to the theory of propellants and explosives by combustion reaction. The samples were added to the silane agent 3-aminopropyltriethoxysilane. After silanized were functionalized with a monomers mixture. By X-ray diffractogram, it was observed the formation of a major phase of ZnAl₂O₄ cubic normal spinel and the secondary phase EuAlO₃. The FTIR spectra for ZnAl_1.9Eu_0.1O₄ exhibit absorption bands below 1000 cm ^-1, and after the functionalization showed two conjugate bands that were attributed to the presence of free NH₂ groups and the binding of oxygen to the group NH₂, and strips Si-O, originating from the silane agent. The emission spectra for samples before and after functionalization showed spectral lines ⁵D₀ → ⁷F₀, ⁷F₁ → ⁵D₀, ⁵D₀ → ⁷F₂, ⁷F₃ → ⁵D₀ and ⁵D₀ → ⁷F₄ and luminescence quantum yield of 58%, but the sample functionalized with a mixture monomers showed an increase in intensity on transition ⁵D₀ → ⁷F₂ and quantum yield of 67%.

Abstract: The decompositon of ethylenediamine (EDA) in supercritical water oxidation (SCWO) were investigated. The experiments were conducted in an isothermal and vertical continuous plug-flow reactor at 375-500°C, 25 MPa, residence time of 2-80 s, and excess oxygen of 150%. It was found that yields of nitrous oxide, nitrogen, and the denitrification rate increased as temperature and residence time increased. The kinetics for denitrification of EDA was described by a rate law involving first order reaction. The results calculated from kinetics equation reconciled the experimental data.

Abstract: The intercalation of ethylenediamine (en) into SnS₂ was synthesised by hydrothermal reaction at the temperature of 180 °C.And then dispersed the intercalation compounds in N, N-dimethylformamide (DMF) by stirring 48h,getting a light yellow sol ,with the nature of uniform ,transparent and stable.Analysised the structural of the product by means of X-ray powder diffraction (XRD) .The morphology of sol was characterized by using of transmission electron microscopy (TEM).The UV-Vis spectrophotometer was utilized for the absorbance of the colloidal.The results show that en has been successfully inserted into the layer of tin disulphide,and the target products is of high purity and good crystal.The sol is of high stability and homogeneity, and have the strongest absorption at the Wavelength of 270nm.

Abstract: The influence of ethylenediamine (en)/Co molar ratio on the preparation of Co/SiO₂ catalysts was studied. The decomposition of these Co-en species resulted in the formation of small cobalt nanoparticles. The highly dispersed catalysts led to lower FT activity due to an increase of cobalt-silica interaction except Co(en)₂/SiO₂ catalyst. Meanwhile, higher selectivity for light hydrocarbons was observed, which was ascribed that smaller cobalt particles containing active sites depressed the chain growth.

Abstract: Magnetic microspheres with chitosan (CTS) and nano-iron (NI) as materials were synthesized by reverse suspension polymerization technology, and then modified with ethylenediamine (EDA). The average amine content of as-prepared magnetic microspheres (CTS-NI-MM-EDA) is 5.22 mmol/g, and the iron content is 23.77%.The adsorption experiments indicated that the adsorption rate of CTS-NI-MM-EDA for methyl orange is in the range of 62%-86% when the concentration of methyl orange is less than 250 mg/L, and the saturated adsorption quantity is 1651mg/g at 25 oC and pH 5.5.

Abstract: Novel sterically hindered chain extender, 2-acetyl-ethylenediamine (MEDA) was synthesized by acetylating of ethylenediamine(EDA) with glacial acetic acid in presence of phosphoric acid, in order to reduce high reactivity of synthesizing polyurea and study its kinetics equation. Its chemical structure was confirmed through FTIR and 1H-NMR analysis. Polyureas were synthesized by reaction of 4,4’-diphe^{Superscript text}nylmethane diisocyanate(MDI), amine terminated polyether(D-2000) with different chain extenders. The reaction kinetics of polyurea curing process was studied by FTIR. The results showed that extending reaction with MEDA was second order kinetic mechanism, its apparent activation energy was 36.81 kJ•mol^-1.

Abstract: The aminated collagen fiber (ACF) was prepared by modifying collagen fiber (CF) with ethylenediamine and cynuric chloride as crosslinking agent. The appropriate modification conditions were optimized by single factor experiment method. The reaction molar ratio of CNC and -NH2 was 1.4, the reaction time of ice water bath was 3h, the temperature of the second phase was 45°C and the reaction time was 4h, the temperature of the third phase was 70°C and the reaction time was 3h. The content of amino of collagen fiber and aminated were measured by the method of salicylaldehyde. The structures of collagen fiber and aminated collagen fiber were characterized by SEM and FTIR respectively. The adsorption capacities and the content of amino of CF and ACF were observed by dealing with acidic black dyeing and sturgeon skin dyeing wastewater.

Abstract: The novelty of the current work lies in the simple synthesis of a new class of monodisperse, luminescent silica spheres produced upon calcination of hybrid amine-functionalized silica spheres which can known the role of ethylenediamine (en) on the morphology and luminescence properties of the resultant silica spheres.