75-04-7Relevant articles and documents
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Shimizu et al.
, p. 1003 (1975)
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REDUCTION OF CYANIDE AND ACETONITRILE BY PROTON NITROGEN-FIXATION SYSTEMS
Pershikova, N. I.,Nikonova, L. A.,Kitaigorodskii, A. N.
, p. 1120 - 1122 (1982)
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Thermodynamic Study of the Solvation States of Acid and Base in a Protic Ionic Liquid, Ethylammonium Nitrate, and Its Aqueous Mixtures
Kanzaki, Ryo,Song, Xuedan,Umebayashi, Yasuhiro,Ishiguro, Shin-Ichi
, p. 578 - 579 (2010)
Ethylammonium nitrate (EAN) is a typical protic ionic liquid (PIL) known for a long time. In order to investigate acidbase reaction mechanisms in PIL, thermodynamic quantities of a reaction, which corresponds to autoprotolysis in amphoteric solvents, has been determined in neat EAN. Unlike H3O + and OH- in water, proton donor and acceptor species in EAN are both neutral; this makes acid-base reaction mechanisms in EAN distinct from that in water. EAN-water mixtures have also been studied.
Fluorescence signaling of Zr4+ by hydrogen peroxide assisted selective desulfurization of thioamide
Hwang, Jiyoung,Choi, Myung Gil,Eor, Suyoung,Chang, Suk-Kyu
, p. 1634 - 1639 (2012)
Thioamide derivative with a pyrene fluorophore was smoothly transformed to its corresponding amide by Zr4+ ions in the presence of hydrogen peroxide. The transformation was evidenced by 1H NMR spectroscopy and the signaling was completed within 10 min after sample preparation. Interference from Ag+ and Hg2+ ions in Zr 4+-selective fluorescence signaling was readily suppressed with the use of Sn2+ as a reducing additive. Discrimination of Zr4+ from closely related hafnium, which is a frequent contaminant in commercial zirconium, was not possible. Prominent Zr4+-selective turn-on type fluorescence signaling was possible with a detection limit of 4.6 × 10-6 M in an aqueous 99% ethanol solution.
Characteristics of Si-Y mixed oxide supported nickel catalysts for the reductive amination of ethanol to ethylamines
Jeong, Ye-Seul,Woo, Yesol,Park, Myung-June,Shin, Chae-Ho
, p. 287 - 297 (2019/10/14)
Si-Y mixed oxide synthesis was achieved via Si dissolution from a Pyrex reactor during the synthesis of yttrium hydroxide by the precipitation method at pH 10 and an aging temperature of 100 ℃. The Ni/SY mixed oxide catalysts with 5–25 wt% Ni contents were synthesized using an incipient wetness impregnation method. The characterization of the calcined Ni/SY oxide catalysts was performed using N2-sorption, X-ray diffraction, H2-temperature programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS), and ethanol-TPD. The reaction parameters such as reaction temperature and the partial pressures of ethanol, NH3, and H2 were varied in the reductive amination reaction, and the catalytic activities for the production of monoethylamine, diethylamine, triethylamine, and acetonitrile as main products were compared. The 10 wt% Ni/SY oxide catalyst containing 11 wt% Si showed the maximum activity, and the presence and absence of H2 and NH3 had a great effect on the conversion and selectivities. The stability after 110 h on stream was observed to be 2.5% less than the initial activity. The cause of this deactivation is the formation of nickel carbonitride, as confirmed by XPS and temperature programmed oxidation (TPO) measurements. On the basis of a detailed proposed reaction mechanism, reaction rates were determined, and the kinetic parameters were estimated by fitting the experimental data obtained under a variety of conditions. Our kinetic model showed that the temperature and the partial pressures of ethanol and hydrogen significantly influenced the conversion, whereas the partial pressure of ammonia had little influence because the imine partial pressure rapidly reached saturation.
Method of preparation of ethylamine or acetonitrile by reductive amination of ethanol
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Paragraph 0095-0099; 0107; 0144, (2019/06/22)
The present invention relates to a catalyst for manufacturing ethylamine and a method for manufacturing the same. More specifically, the present invention relates to: a nickel-supported catalyst for manufacturing ethylamine or acetonitrile which has impregnated nickel on a supporter as a catalyst capable of efficiently manufacturing ethylamine or acetonitrile at a normal pressure or lower by reacting ethanol with ammonia, a method for manufacturing the same, and a method for manufacturing ethylamine using the same.COPYRIGHT KIPO 2019
A ppm level Rh-based composite as an ecofriendly catalyst for transfer hydrogenation of nitriles: Triple guarantee of selectivity for primary amines
Liu, Lei,Li, Jifan,Ai, Yongjian,Liu, Yuhong,Xiong, Jialiang,Wang, Hongdong,Qiao, Yijun,Liu, Wenrui,Tan, Shanchao,Feng, Shaofei,Wang, Kunpeng,Sun, Hongbin,Liang, Qionglin
, p. 1390 - 1395 (2019/03/26)
Hydrogenation of nitriles to afford amines under mild conditions is a challenging task with an inexpensive heterogeneous catalyst, and it is even more difficult to obtain primary amines selectively because of the accompanying self-coupling side reactions. An efficient catalytic system was designed as Fe3O4@nSiO2-NH2-RhCu@mSiO2 to prepare primary amines through the transfer hydrogenation of nitrile compounds with economical HCOOH as the hydrogen donor. The loading of rhodium in the catalyst could be at the ppm level, and the TOF reaches 6803 h-1 for Rh. This catalytic system has a wide substrate range including some nitriles that could not proceed in the previous literature. The experimental results demonstrate that the excellent selectivity for primary amines is guaranteed by three tactics, which are the strong active site, the inhibition of side products by the hydrogen source and the special pore structure of the catalyst. In addition, the catalyst could be reused ten times without activity loss through convenient magnetic recovery.