15843-42-2Relevant articles and documents
Eder, J. M.,Valenta, E.
, (1880)
Phase transformation of FeC2O4 · 2H2O heat treated in H2/NH3
Xue,Li,Kong,Yang
, p. 461 - 465 (1996)
The phase transformation of FeC2O4 · 2H2O heat treated in H2/NH3 is studied with differential scanning calorimetry (DSC), X-ray diffraction (XRD) and Mossbauer spectroscopy. The results indicate that
Formation and transformation kinetics of amorphous iron(III) oxide during the thermally induced transformation of ferrous oxalate dihydrate in air
Koga, Nobuyoshi,Sato, Yuka
, p. 141 - 151 (2011)
Focusing on the formation and transformation of amorphous Fe 2O3 in the course of the thermally induced transformations of ferrous oxalate dehydrate in air, the kinetics and physico-geometric mechanisms of the respective reaction ste
Oxalic acid complexes: Promising draw solutes for forward osmosis (FO) in protein enrichment
Ge, Qingchun,Chung, Tai-Shung
, p. 4854 - 4857 (2015)
Highly soluble oxalic acid complexes (OACs) were synthesized through a one-pot reaction. The OACs exhibit excellent performance as draw solutes in FO processes with high water fluxes and negligible reverse solute fluxes. Efficient protein enrichment was achieved. The diluted OACs can be recycled via nanofiltration and are promising as draw solutes.
Multilayer iron oxalate with a mesoporous nanostructure as a high-performance anode material for lithium-ion batteries
Zhang, Keyu,Liang, Feng,Wang, Yunke,Dai, Yongnian,Yao, Yaochun
, p. 91 - 99 (2019)
In the search to improve the irreversible capacity of transition-metal oxalates, iron oxalate with a multilayer and mesoporous nanostructure has been produced via a liquid-phase precipitation method with the use of a solvent. The feeding sequence and self-assembly, considering hydrophobic interlamination interactions and the interconnection between ethanol molecules and the crystallographic planes, have been investigated to determine their influence on the customized structure and morphology. The unique structural organization significantly improves the electrochemical properties to achieve a high discharge capacity of ～1521.2 mAh g?1 at 1 C current rate, exhibiting a capacity retention of 63.29% for the first cycle and delivering approximately 65.30% in the 200th cycle; a satisfactory cycle and rate performance of ～993.3, ～723.1, ～710.7, and ～584.3 mAh g?1 for 1, 3, 5 and 10 C after 200 cycles, respectively; and slight voltage hysteresis. The high capacity is a result of the mesoporous nanostructure, which provides additional volume availability and enhances the capacitive effect. The favourable capacity retention, reasonable rate performance, and cycling stability are attributed to the multilayer structure with additional unobstructed and stable channels for Li+ and electron diffusion.
Development of a Resource-Saving Technology of Catalysts for Medium-Temperature Conversion of Carbon Monoxide in Ammonia Production
Chuyasova, A. A.,Il’in, A. A.,Il’in, A. P.,Lapshin, M. A.,Popov, D. S.,Rumyantsev, R. N.
, p. 1173 - 1177 (2020)
Abstract: The physicochemical characteristics of modern catalysts for the medium-temperature conversion of carbon monoxide to hydrogen in the production of ammonia were studied by X-ray diffraction, scanning electron microscopy, gas chromatography, and thermogravimetric and laser dispersion analyses. It was shown that, along with iron oxide, the catalysts contained promoter additives of Cr, Cu, Ca, and Mn compounds in a total concentration of 1–9 wtpercent. The investigated commercial catalysts have a monodisperse porous structure with a pore size of up to 10 nm and a large surface area from 70 to 120 m2/g. The catalytic activity of the samples was estimated by the conversion of CO in a flow-type plant. At 2.2 MPa and 340 °C it was 89–91percent. The drawback of the catalysts was that the condensate contained rather much ammonia (27.6–45.6 mg/L). It was established that using calcium and copper ferrites and nickel oxide as promoters makes it possible to obtain a catalyst that is not inferior in activity to commercial analogs but has a higher selectivity by reducing the ammonia content of the condensate by 20–30percent.
Synthesis and electrochemical reaction with lithium of mesoporous iron oxalate nanoribbons
Aragon, Maria Jose,Leon, Bernardo,Vicente, Carlos Perez,Tirado, Jose L.
, p. 10366 - 10371 (2008)
Mesoporous FeC2O4 was prepared by dehydration of bulk monoclinic- and micellar orthorhombic FeC2O4 ·2H2O precursors at 200°C. The micellar material shows nanoribbon shaped particles, which are preserv
Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate physico-chemical studies
Randhawa,Sweety
, p. 829 - 835 (2001)
Thermal analysis of magnesium tris(maleato) ferrate(III) dodecahydrate has been studied from ambient to 700°C in static air atmosphere employing TG, DTG, DTA, XRD, Moessbauer and infrared spectroscopic techniques. The precursor decomposes to iron(II) intermediate species along with magnesium maleate at 248°C. The iron(II) species then undergo oxidative decomposition to give α-Fe2O3 at 400°C. At higher temperatures magnesium maleate decomposes directly to magnesium oxide, MgO, which undergoes a solid state reaction with α-Fe2O3 to yield magnesium ferrite (MgFe2O4) at 600°C, a temperature much lower than for ceramic method. The results have been compared with those of the oxalate precursor.
MAGNETITE PRODUCTION FROM BAUXITE RESIDUE
-
, (2019/06/20)
A low-temperature leaching operation employs a raw, red mud slurry directly from aluminum production for an oxalic acid leaching of ferric oxalate. Residual calcium, titanium, aluminum and other rare earths are also recoverable in a secondary stream. Monitoring and control of the pH of the leach solution yields soluble ferric oxalate without high temperatures or specific radiation or light sources. Addition of iron powder results in precipitation of ferrous oxalate, isolated by magnetic separation from the iron powder which recirculates in the solution. Magnetite may then be produced by heating the ferrous oxalate in low pO2 conditions.
