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Thermodynamics and density functional theory study of potassium dichromate interaction with galenaJian-Hua Chen1,2,Xian-Hao Long1,Li-Hong Lan3,Qian He21. College of Chemistry and Chemical Engineering... of Chemistry and Chemical Engineering, Guangxi University for Nationalities摘 要:The adsorption heat and reaction rate constant of potassium dichromate......
三氯化铁浸出-重铬酸钾滴定法测定钛精粉还原产物中的金属铁李传维1,司新国1,鲁雄刚1,郭曙强1,丁伟中1(1.上海市上海大学上海市现代冶金与材料制备重点实验室)摘 要:试样用三氯化铁溶液溶解,金属铁被氧化为二氯化铁,过滤分离,滤液酸化后以二苯铵磺酸钠为指示剂,用重铬酸钾标准溶液滴定,实现了钛精粉还原产物中金属铁含量的测定.结果表明,试样粒度在0.125mm以下时,FeCl3溶液浓度和用量分别为10g/L和100mL,采用电磁搅拌60min为最佳的实验条件.分别用HgCl2分析法,矿相法对方法正确度进行检测,其中......
重铬酸钾容量法测定镝铁合金中的铁量 周凯红1,王东杰1,高励珍1,郝茜1 (1.稀土冶金及功能材料国家工程研究中心,内蒙古包头014030;2.包头稀土研究院,内蒙古包头014030) 摘要:采用重铬酸钾容量法测定了镝铁合金中的铁,系统考察了有关试剂加入量对测定结果的影响,并进行了精密度及标准回收试验.此方法准确,快速. 关键词:镝铁合金; 铁量; 重铬酸钾容量法; Dy-Fe alloy; iron contents; the potassium dichromate method; [全文内容正在添加中] ......
循环伏安法测定溶液中Fe3+和Fe2+浓度比李云1,王晨雪1,尚游2,尚世智1,郭建伟2(1.辽宁省沈阳市沈阳化工大学应用化学学院2.沈阳市公安局刑事警察支队 技术处,辽宁沈阳 110002)摘 要:采用循环伏安法(CV)测定铁泥制备Fe3O4过程中Fe3+与Fe2+浓度比值的变化,为该工艺过程提供方便,快捷的监测方法.在实验条件下,溶液中的Fe3+与Fe2+组成可逆的氧化还原体系,产生一对峰形良好的氧化还原峰.对影响峰电流的扫描速度,pH值及干扰离子等因素进行考察,结果表明,扫描速度在0.002~0.01 V......
136.1 文献标识码:A Separation of aluminum and silicon in clean production process for potassium dichromate WANG Shao-na1, 2, ZHENG Shi-li 1, ZHANG Yi1 (1. Institute... in the clean production process for potassium dichromate was studied. The thermodynamic calculation results indicate that there is no produce of poisonous CaCrO4 when CaO is added into solution. When......
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and instructive to industrial application. Key words: viscosity; density; potassium chromate; potassium hydroxide; mixed electrolytes... mm. The chemical reagents potassium chromate (K2CrO4) and potassium hydroxide (KOH) used in this work were AR grade and GR grade, respectively, and used directly without further purification......
A novel method to produce potassium chromate from carbon ferrochromeHU Guo-rong(胡国荣), WANG Jia-liang(王家良), PENG Zhong-dong(彭忠东), DU Ke(杜柯) (School of Metallurgy and Environment, Central South University, Changsha 410083, China)Abstract:The oxidizing roasting of carbon ferrochrome in the presence of potassium carbonate and air was investigated. The effects of reaction temperature, reaction time......
Investigation of High Molar Ratio Potassium Solution Used in Zinc-Rich Coatings LI Sheng1,YAN Rui1,WU Hang1 (1.Surface Engineering Research Institute, Beijing 100072, China) 摘要:High molar ratio potassium silicate solution used in zinc-rich water-base coatings was prepared by adding the nanosize SiO2 to the low molar ratio potassium silicate solution, and its microstructure was investigated......
