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火焰原子吸收光谱法间接测定石灰石中氯含量姚永生1(1.河南省安阳市河南省有色金属地质矿产局第一地质大队)摘 要:提出了用硝酸溶解样品,以火焰原子吸收光谱间接测定石灰石中氯含量的分析方法.采用先往样品与校准曲线溶液中加入等量的氯离子,然后再往样品溶液中加入过量银离子使样品溶液及校准曲线溶液形成氯化银饱和溶液的方法,解决了火焰原子吸收间接法测定氯含量时微量悬浮氯化银及氯化银溶解性对测定的影响问题.在溶样过程中加入过硫酸铵氧化除去S2-,I-及大部分Br-等干扰离子,避开了过滤,蒸馏等繁琐且易受污染的操作步骤.方法相......
J. Cent. South Univ. (2017) 24: 311-317 DOI: 10.1007/s11171-017-3432-5 Vanadium extraction from vanadium-bearing titanomagnetite by selective chlorination using chloride wastes (FeClx) ZHENG Hai-yan... chlorination; thermodynamic analysis; chloride wastes 1 Introduction Vanadium-bearing titanomagnetite deposits are abundant and widely-distributed in China. The ores of the titanomagnetite deposits......
Binding tendency with oligonucleotides and cell toxicity of cetyltrimethyl ammonium bromide-coated single-walled carbon nanotubes YAN Xue-bin1, 2, GU Yong-hong2, HUANG Dong2, GAN Li2, WU... with small interfering RNA oligonucleotides and cytotoxicity of cetyltrimethyl ammonium bromide (CTAB)-coated single-walled carbon nanotubes (SWNTs) were studied. The field emission scanning electron......
Mechanism of scaling on oxidation reactor wall in TiO2 synthesis by
chloride process
ZHOU E(周 峨)1, YUAN Zhang-fu(袁章福)1, WANG Zhi(王 志)1,
FANG Xian-Guo(范先国)2, GONG Jia-Zhu(龚家竹)2
1... and the more compact the scale structure is.
Key words: TiO2 synthesis; scaling; reactor wall; oxidation; chloride process
(vinyl chloride) resin ZENG Xiao(曾笑)1, 2, YANG Zhan-hong(杨占红)1 1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. Kunming Training Crops, Fire... alone for thermal stability of poly (vinyl chloride) (PVC) resin, with different Ca/Zn/Al molar ratios and varying additive amounts, were investigated through the tests such as static thermal aging......Synthesis of CaZnAl-CO3 ternary layered double hydroxides and its application on thermal stability of poly (vinyl chloride) resin
AI导读
来源: 《中南大学学报(英文版)2020年第3期》——杨占红 曾笑
Zhi-ying, HU Hui-ping, LIU Kui, CHEN Qi-yuan. Dissolution of zinc silicate (hemimorphite) with ammonia-ammonium chloride solution[J]. Hydrometallurgy, 2010, 103(1/4): 215-220. [13] CHEN Ai-liang, ZHAO...)3. 图5 硫酸铵焙烧低品位氧化锌矿的TG-DTA曲线 Fig. 5 TG-DTA curves of low grade zinc oxide ore roasted by ammonium sulfate 可见,TG-DTA曲线上,50 ℃的吸热峰为吸附水脱除;290 ℃的吸热峰涉及ZnCO3和硫酸铵的分解,锌和铁化合物与硫酸铵的反应等;330 ℃的吸热峰涉及碳酸盐的......
of ammonium chloride introducing [J]. International Journal of Hydrogen Energy, 2015, 40: 6145-6150. [25] ZHENG Jie, YANG Deng-chen, LI Wei, FU He, LI Xing-guo. Promoting H2 generation from the reaction of Mg...Trans. Nonferrous Met. Soc. China 27(2017) 562-568 Influence of chloride salts on hydrogen generation via hydrolysis of MgH2 prepared by hydriding combustion synthesis and mechanical milling Shu LI......
J. Cent. South Univ. (2020) 27: 876-890 DOI: https://doi.org/10.1007/s11771-020-4338-6 Performance of interface between TRC and existing concrete under a chloride dry-wet cycle environment LI Yao(李... to investigate the effects of the chloride dry-wet cycles on the average shear strength and slip at the interface between the TRC and existing concrete, also considering the existing concrete strength......
of construction of the concentrate figure of c(Cu2+)-c(NH4Cl)-c(NH4OH). As the development of using ammoniacal ammonium chloride metallurgy to treat copper oxide ore[10,11], to clarify... of ammonia and ammonium in the system; c(NH3 (aq)) is the concentration of free ammonia in system; i, j and k are the numbers of ammonia, chloride and hydroxide ligands, respectively. According......
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