Thermolysis of Thorium Precipitates Salts of Organic Acids

Abstract

Found6Recovery, Untreated 0.006 0.12 ± 0.1 (2) 0.022 1.3 0.7(1) 54.0 0.060 2.6 2.2(1) 85.0 Fumigated 0.211 8.3 ±1.1 (4) 0.104 4.1 ± 0.0(2) 0.211 8.3 ±0.4(2) 0.145 5.6 ± 0.6(2) " 20-gram samples. 1 Figures in parenthesis represent number of determinations.

Structural characterization of methanol substituted lanthanum halides

“…Due to the presence of water, the hydrates are obviously unattractive for scintillator applications; however, in contrast to literature reports,[9, 10, 17, 37] it was determined that anhydrous LaBr 3 could be isolated by simply heating [{(H 2 O) 7 La(μ-Br)} 2 ](Br) 2 ( 1 , see Figure 1a) under vacuum (eq 2). [20] This gave a simple, reproducible, large-scale route that produced no waste for production of LaBr 3 scintillator materials.…”

Synthesis, characterization and thermal behaviour of solid-state compounds of 4-methoxybenzoate with some bivalent transition metal ions

“…Several papers reported the thermal stability and thermal decomposition of solid-state salts as thorium with several organic acids, including 4-methoxybenzoic acid [6], as well as benzoic and mhydroxybenzoic acids [7]; the thermal decomposition of nickel benzoate and of the nickel salt of ciclohexane carboxylic acid [8]; the thermal and spectral behaviour on solid compounds of benzoates and its methoxy derivates with rare earth elements [9-12, 14, 15-17] ; the vibrational and electronic spectroscopic study of lanthanides and effect of sodium on the aromatic system of benzoic acid [13,16]; the reaction of bivalent cooper, cobalt and nickel with 3-hidroxy-4-methoxy and 3-methoxy-4-hidroxybenzoic acids and a structure for these compounds has been proposed on the basis of spectroscopic and thermogravimetric data [18]; the thermal decomposition of thorium salts of benzoic and 4-methoxybenzoic acids in air atmosphere [19]; the thermal and spectral behaviour on solid compounds of 5-chloro-2-methoxybenzoate with rare earth and d-block elements [20][21][22][23]; the synthesis and characterization of 2,3-dimethoxybenzoates of heavy lanthanides and yttrium [24]; the spectral and magnetic studies of 2-chloro-5-nitrobenzoates of rare earth elements [25] and thermal behaviour of solid state 4-methoxybenzoates of some bivalent transition metal ions [26].…”

Thermal decomposition of thorium(IV) salts of benzene carboxylic acids in air atmosphere

“…Of the compounds of thorium(IV) with aminobenzoic acids, only the salts of 2-aminobenzoic acid have been well studied [1][2][3][4][5][6]. The thorium(IV) salts of 4-aminobenzoic acid are little known [2,7] and that of 3-aminobenzoic acid is described in only one paper [8].…”

“…The thorium(IV) salts of 4-aminobenzoic acid are little known [2,7] and that of 3-aminobenzoic acid is described in only one paper [8]. Wendlandt presented TG curves of di(2-aminobenzoato)dihydroxothorium(IV) [6] and (4-aminobenzoato)trihydroxothorium(IV) [7].…”

“…Wendlandt [6], Deshmukh [9][10] and Kovalenko [11] prepared di(3-hydroxybenzoato)dihydroxothorium(IV) and di(4-hydroxybenzoato)dihydroxothorium(IV) and studied their thermal stability [6,11]. Some salts of thorium(IV) with 2-hydroxybenzoic acid have been prepared as solids [12][13][14][15][16][17][18][19], but their properties have not been studied exactly.…”