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Preparation of Fine Spherical Particle Sized Ceria by Precipitation Method with Ammonium Bicarbonate Cui Dali1,Zhang Guocheng1,Zhu Zhaowu1,Zhang Shunli1,Long Zhiqi1 (1.Advanced Materials Co. Ltd., Beijing General Research Institute of Nonferrous Metals, Beijing 100088, China) Abstract:Fine spherical particle sized ceria (CeO2) was prepared by homogeneous precipitation method with ammonium......
precipitation and its concentration has a large influence on the amount of precipitation. Ammonium sulfate [(NH4)2SO4] concentration can be set at 0.5 and 3.0 g/L respectively in medium with pH=1.5 while... Biological preparation and application of poly-ferric sulfate flocculant WANG Hui-min, MIN Xiao-bo, CHAI Li-yuan, SHU Yu-de School of Metallurgical Science and Engineering, Central South University......
硝酸铵氧化滴定法测定锰铁中锰含量的不确定度评定桑林1,边立槐1(1.天津市天津钢铁集团有限公司 技术中心)摘 要:通过分析影响硝酸铵氧化滴定法测定锰铁中锰含量不确定度的各种因素和评定各个不确定度分量,计算出合成标准不确定度,最终给出置信因子为2时的扩展不确定度.评定结果表明,样品测量重复性引入的不确定度对总不确定度的影响最大,其次是用标准物质标定硫酸亚铁铵标准滴定溶液,滴定时消耗硫酸亚铁铵标准滴定溶液体积和称量引入的不确定度.因此为了保证测量结果的准确性和可靠性,应通过规范实验人员操作来降低随机误差对测量不确定......
Ultrasonic testing and microscopic analysis on concrete under sulfate attack and cyclic environmentJIANG Lei(姜磊), NIU Di-tao(牛荻涛), SUN Ying-zhao(孙迎召), FEI Qian-nan(费倩男) (College of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)Abstract:The damage process of concrete exposed to sodium sulfate attack and drying-wetting cycles was investigated. The water......
Study on New Kind of Rare Earth-Containing Flocculants of Poly-Ferric Sulfate Chloride Zhu Hengxiang1,Li Jinai1,Pang Xijie1,Luo Yongjian1,Yao Jiye1,Xiao Xueyan1,Kuang Juchi1 (1.Department of Chemistry and Chemical Engineering , Foshan University, Foshan 528000, China) Abstract:A new kind of rare earth- containing flocculant of poly-ferric sulfate chloride (PFSCRE) was studied, and proved......
by ammonium sulfate [4,5]. Ammonium adsorption by the soils within the mining area occurs with seeping and leakage of the leaching agent. Therefore, is constantly accumulating and remains... is associated with leaking solution of ammonium sulfate, and the other form relates to the adsorption onto clay minerals. Adsorption being a complex process [11,12], it is very important to study......
Effect of Sulfate Ions on YAG Powders Synthesized by Microwave Homogeneous Precipitation Xu Hongyan1,Wang Jieqiang1,Yue Yunlong1,Wang Yong1 (1.School of Materials Science and Engineering, Jinan.... The results show that sulfate ions influence the dispersion, composition and morphology of the YAG precursors. The addition of moderate sulfate ions can produce YAG powders with nano size and excellent......
:1672-7207(2011)08-2204-05 Preparation of high-purity light magnesia from sulfate salt subtype salt lake brine XU Hui, LIU Wei-ping, YANG Xi-yun, SHI Xi-chang, CHEN Shi-yue, YU Liang-liang (School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China) Abstract: Using sulfate salt subtype salt lake brine as raw materials, light-magnesia was prepared......
Preparation of spiro-type quaternary ammonium salt via economical and efficient synthetic route as electrolyte for electric double-layer capacitorZHOU Hong-ming(周宏明)1, 2, SUN Wen-jiao(孙文佼)1, LI Jian...)Abstract:A spiro-type quaternary ammonium salt, spiro-(1,1′)-bipyrrolidinium tetrafluoroborate (SBP-BF4) was successfully prepared by an economical and efficient three-step process comprising......
J. Cent. South Univ. Technol. (2010) 17: 760-764 DOI: 10.1007/s11771-010-0553-x Solvent extraction of zinc from zinc sulfate solution LONG Huai-zhong(龙怀中)1, CHAI Li-yuan(柴立元)1, QIN Wen-qing(覃文庆)2...; Abstract: The extraction of zinc from zinc sulfate solution was investigated, using 20% saponified D2EHPA as an extractant and 260# sulfonate kerosene......