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三氯化钛还原-高锰酸钾无汞滴定法测定铁矿石中全铁量 赵树宝1 (1.安徽省庐江县龙桥矿业有限公司,安徽庐江,231551) 摘要:用HNO_3-HF处理,硫-磷混酸溶解试样,在盐酸介质中,用二氯化锡-三氯化钛将Fe~(3+)还原为Fe~(2+),以二苯胺磺酸钠为指示剂,以高锰酸钾标准溶液滴定铁矿石中的全铁量.试验并确定了测定过程中的各种最佳分析条件.方法用于分析铁矿石中全铁含量,其相对标准偏差在0.28%~1.0%之间,结果与认定值相符.该方法避免了二氯化汞-重铬酸钾滴定法中汞和铬对环境的二次污染. 关键词:高锰酸钾无汞滴定法; 铁矿石; 全铁; mercury-free titration with potassium permanganate; iron ore; total iron; [全文内容正在添加中] ......
,晶体结构; X-ray diffraction; calcium potassium sodium phosphate; crystal structure; [全文内容正在添加中] ......
水-正丙醇-硫酸铵体系析相萃取分离钯的研究沈久明1,司学芝1,李想1,马万山1(1.河南省信阳市信阳师范学院化学化工学院)摘 要:研究了水-正丙醇析相萃取Pd(Ⅱ)的行为及Pd(Ⅱ)与一些金属离子分离的条件.结果表明,硫酸铵能使正丙醇的水溶液分成两相,在分相过程中,Pd(Ⅱ)与溴化钾生成的PdBr42-与质子化正丙醇(C3H7OH2+)形成缔合物[PdBr42-][C3H7OH2+]2能被正丙醇相完全萃取.当溶液中正丙醇的体积分数,溴化钾浓度和硫酸铵的质量浓度分别为30%,7.0×10-3 mol/L,0.2 ......
; 文章编号:1672-7207(2018)03-0511-07 Flotation separation of spodumene from feldspar with mixed collectors and its mechanism TIAN Jia1, XU Longhua1, 2, 3, DENG Wei4, YI Facheng1, WU... Institute, Chinese Academy of Geological Sciences, Chengdu 610041, China) Abstract: The flotation separation and adsorption mechanism of spodumene from feldspar using the mixed anionic/ cationic collector......
of potassium hexatitanate whisker XU Wan-zhen1, WANG Ling-ling2, LI Chun-xiang1, 2, JING Jun-jie2, YAN Yong-sheng1, 2 (1. School of Environment, Jiangsu University, Zhenjiang 212013, China; 2. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China) Abstract: The potassium hexatitanate whisker was used as solid-phase extractant and inductively coupled plasma......
to 37.26 m2/g after transesterification of soybean oil and methanol in the ultrasound field. Key words: ultrasonic; potassium fluorin/γ-alumina catalyst; transesterification; biodiesel; soybean oil 生物柴油... al. Organic reaction of the alumina coated with potassium fluoride[J]. Journal of Hebei University: Natural Science Edition, 2004, 24(1): 91-98. [11] XIE Wen-lei, LI Hai-tao. Alumina-supported......
of lithium salt and potassium salt on prebaked cell production[J]. Journal of Materials and Metallurgy, 2010, 9(s1): 148-149. [7] 程保生. 铝电解质体系中锂盐含量对技术参数的影响[J]. 甘肃冶金, 2012, 34(5): 24-26. CHENG Bao-sheng...] SOLHEIM A, STOEN L, KVELLO J. Cryoscopic data for Hall-Héroult bath containing magnesium fluoride, calcium fluoride, potassium cryolite, and sodium chloride[C]//SUAREZ C E. Light Metals 2012. Orlando, FL......
341000, China; 2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The effects of collector potassium amyl xanthale (PAX) and depressant... not be adsorbed on the chlorite surface. Key words: chlorite; pyrite; potassium amyl xanthale; flotation separation; carboxy methyl cellulose; competitive adsorption 硫化镍矿是我国金属镍资源的主要来源.然而我国硫化镍矿资源中存在大量的低品位硫化镍矿,矿......
Trans. Nonferrous Met. Soc. China 25(2015) 981-990 Synthesis of platy potassium magnesium titanate and its application in removal of copper ions from aqueous solution Yan-ni TAN, Ni SONG, Yong LIU... 2014 Abstract: Platy potassium magnesium titanate (K0.8Mg0.4Ti1.6O4, KMTO) was synthesized by a flux method. The potential application of KMTO in removing copper ions from water pollutants......
氟硅酸钾滴定法测定铬矿中二氧化硅戚淑芳1,邴一宏1,张杰1,王隽1(1.辽宁省鞍山市鞍钢股份公司技术中心)摘 要:提出了采用KOH或KOH-KNO3低温亚熔盐法分解铬矿,用氟硅酸钾滴定法测定其中二氧化硅的方法.本方法消除了Al2O3及MgO的共沉淀干扰,同时避免了过氧化钠对坩埚材料的严重腐蚀,坩埚使用寿命比用过氧化钠高温熔融时提高了10倍以上.用自制的带塑料抽滤器的抽滤瓶抽滤沉淀物,速度快,残余酸易洗涤,中和,无漏滤现象.方法用于铬矿中二氧化硅的测定,相对标准偏差(RSD)小于1.3%,回收率为98%~101%......
