Thermal decomposition of formates. Part IX. Thermal decomposition of rare earth formate anhydrides
作者:Yoshio Masuda
DOI:10.1016/0040-6031(83)80108-7
日期:1983.9
Abstract The thermaldecomposition of rare earth formate anhydrides in a flowing nitrogen atmosphere was studied systematically by means of thermogravimetry and differential thermal analysis. The decomposition consisted of two or three stages 2 Ln(HCO 2 ) 3 → 2 LnO(HCO 2 ) → Ln 2 O 2 ·CO 3 → Ln 2 O 3 The monoxyformate did not appear in the decomposition of the lighter element formates except for lanthanum
Bismuth and mixed bismuth-lanthanide carboxylates as precursors for pure and Ln-promoted bismuth molybdate catalysts
作者:M. Devillers、F. De Smet、O. Tirions
DOI:10.1016/0040-6031(95)90492-1
日期:1995.8
Several bismuth(III) carboxylates (formate, acetate, propionate, oxalate, lactate) and the analogous tervalent lanthanum, samarium and praseodymium formates and acetates were synthesized and characterized in view of their use as precursors for the formation of bismuth- or lanthanide-based molybdate catalysts upon controlled thermaldecomposition on MoO3 support. Mixed Bi-Ln carboxylates were prepared
合成了几种铋 (III) 羧酸盐(甲酸盐、乙酸盐、丙酸盐、草酸盐、乳酸盐)和类似的三价镧、钐和镨甲酸盐和乙酸盐,并根据它们作为形成铋或镧系元素的前体的用途进行了表征MoO3 载体上受控热分解的钼酸盐催化剂。制备了混合的 Bi-Ln 羧酸盐并同时用作 Ln 促进的钼酸铋催化剂的前体。发现镧系元素的性质和煅烧温度决定了特定钼酸盐型相在载体上的形成。通过 X 射线衍射和 FTIR 光谱对这些催化剂进行详细检查,确定了在 823 K 下煅烧的含 Bi 和 Pr 样品中的 α-M(2)Mo(3)O(12) 相,
Outstanding fluoride removal from aqueous solution by a La-based adsorbent
作者:Weisen Yang、Fengshuo Shi、Wenlong Jiang、Yuhuang Chen、Kaiyin Zhang、Shaoju Jian、Shaohua Jiang、Chunmei Zhang、Jiapeng Hu
DOI:10.1039/d2ra06284d
日期:——
A La-based adsorbent was prepared with La(NO3)3·6H2O, 2-methylimidazole and DMF via amide-hydrolysis and used for fluoride decontamination from aqueous water.
通过酰胺水解法利用 La(NO3)3-6H2O、2-甲基咪唑和 DMF 制备了一种 La 基吸附剂,并将其用于去除水体中的氟化物。
Origin of organic gaseous products formed in the thermal decomposition of formates
作者:A. Górski、A. Kraśnicka
DOI:10.1007/bf01905178
日期:1987.7
A novel family of lanthanide complexes associating two ligands, glycolate and carbonate. Synthesis and characterization of Ln2 (H3C2O3) 4 (CO3) with Ln (III) = La, Ce and Nd
作者:J.C. Trombe、S. Roméro、A. Mosset
DOI:10.1016/s0277-5387(98)00012-6
日期:1998.7
New lanthanide complexes involving the two ligands, glycolate and carbonate, have been prepared, as a pure phase, by reacting an aqueous suspension of the corresponding lanthanide formate and glycolic acid in closed reactor, under autogeneous pressure at 200 degrees C for one month. The structure of these compounds was determined from single-crystal X-ray method on neodymium complex. It crystallizes in the monoclinic system (space group P2(1)/n) with a three-dimensional framework structure. The coordination scheme of the two independent neodymium atoms is built up by 9 or 10 oxygen atoms from both glycolate and carbonate ligands. The carbonate group acts as a bismonodentate, bischelating ligand. One glycolate is bischelating while the three latter are chelating and monodentate. Infrared spectrum and thermogravimetric analysis of this family are also presented. A tentative explanation of its synthesis will be briefly discussed. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.