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J. Cent. South Univ. (2016) 23: 39-43 DOI: 10.1007/s11771-016-3046-8 Kinetic study on leaching of nickel from Turkish lateritic ore in nitric acid solution Tevfik AGACAYAK, Veysel ZEDEF, Ali ARAS... of nickel from lateritic ore in nitric acid solution was investigated. Experimental parameters used were stirring speed (100-600 r/min), temperature (40-96 °C), nitric acid concentration (0.1-2 mol/L......
J. Cent. South Univ. (2016) 23: 1312-1317 DOI: 10.1007/s11771-016-3181-2 Coordination leaching of tungsten from scheelite concentrate with phosphorus in nitric acid ZHANG Wen-juan(张文娟)1, YANG Jin... for tungsten extraction and recovery from scheelite is reported. The technology includes leaching scheelite using phosphoric acid as chelating agent in nitric acid solutions, extracting tungsten......
Solvent extraction equilibrium of dysprosium(Ⅲ) from nitric acid solutions with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester HUANG Ying1, 2, TANAKA Mikiya1 1. Research..., the development of a chemically based model applicable to high concentration is desired. In the present study, the equilibrium distribution of dysprosium(Ⅲ) between an aqueous nitric acid solution......
QUANTUM CHEMICAL STUDY ON THE REACTION OF PYRITE WITH NITRIC ACID+Yang Tianzu; Zhao Tiancong; Lu Yiyuan(Department of Nonferrous Metallurgy, Central South University of Technology, Changsha, 410083, China)Abstract:The reaction of pyrite with nitric acid was studied using CNDO/2 method. Strong coordinate bond and back π bond between Pe2+and are formed in pyrite. In nitric acid solution when acts......
Leaching kinetics of celestite in nitric acid solutionsFeray Kocan,Umran Hicsonmez摘 要:In this study, strontium nitrate extraction from celestite in nitric... process. The kinetic model best fit control by diffusion through the product layer. The activation energy of the dissolution celestite in nitric acid solutions was calculated to be 42.22 kJ/mol.
Pressure nitric acid leaching of alkali-pretreated low-grade limonitic lateriteYong-Lu Zhang,Cheng-Yan Wang,Yong-Qiang Yang,Fei Yin,Bao-Zhong MaInstitute of Metallurgy, Beijing General Research Institute of Mining and Metallurgy摘 要:The pressure nitric acid leaching of alkali-pretreated low-grade limonitic laterite, as well as removing impurity Al(III......
Nitric Oxide Alleviates Oxidative Stress Caused by Lanthanum in Rice Leaves Xiao Qiang1,Huang Xuan1,Wu Feihua1,Pei Zhenming3,Zheng Hailei1,Ru Qiaomei1 (1.School of Life Sciences, Xiamen University... sodium nitroprusside (SNP), a donor of NO, in the seedlings grown in Mura B nutrient solution with 100 μmol·L-1 La. Although the content of ascorbate acid (AsA) were scarcely affected by La or NO in our......
Trans. Nonferrous Met. Soc. China 22(2012) 206-214 Extraction of cerium(IV) using tributyl phosphate impregnated resin from nitric acid medium O. S. HELALY1, M. S. ABD EL-GHANY1, M. I. MOUSTAFA1...(IV) extraction from nitric acid medium at room temperature. Cerium loading capacity of the impregnated resin reached 95.6% of the calculated theoretical capacity (173 g/kg (Ce/SIR)) under......
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积. 关键词:炭纤维； 硝酸氧化；热解炭；CVD 中图分类号:TP332 文献标志码:A 文章编号:1672-7207(2012)02-0460-06 Effect of nitric acid...) Abstract: Nitric acid oxidation was performed on carbon fibers before CVD. The effects of nitric acid oxidation on carbon fibers and the microstructure of pyrocarbon were studied. The results show......
