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Ammonium Metavanadate Fabricated by Selective Precipitation of Impurity Chemicals on Inorganic Flocculants

Journal of Renewable Materials 2023年第4期11卷 1951-1961页

作者： Bo Shi Dandan Zhu Pengxiang Lei Ximin Li Hengbo Xiao Lihua Qian Shandong Aluminum Industry Corporation Limited ZiboChina Petroleam&Natural Gas Transport Corporation of China WuhanChina School of Chemistry and Chemical Engineering Hubei University of TechnologyWuhanChina School of Physics Huazhong University of Science and TechnologyWuhanChina

High purity ammonium metavanadate(NH_(4)VO_(3))is the most vital chemical to produce V2O5,VO2,VN alloy,VFe alloy and VOSO4,which have some prospective applications for high strength steel,smart window,infrared detector and imaging,large scale energy storage system.NH_(4)VO_(3)is usually produced by spontaneous crystallization from the aqueous solution due to its sharp dependence of solubility on the temperature.However,hazardous chemicals in industrial effluent,include phosphorate,silicate and arsenate,causing severe damage to the environment.In this work,these impurities are selectively precipitated onto inorganic flocculants,while the vanadate dissolved in an aqueous solution keeps almost undisturbed.Therefore,high purity NH_(4)VO_(3)is produced by the crystallization from the purified solution.By screening various flocculants and precipitating parameters,polyaluminum sulfate with an optimal amount of 50 g/L,is demonstrated to selectively remove phosphorate,silicate and arsenate,corresponding to the removing efficiency of 93.39%,97.11%and 88.31%,respectively.NH_(4)VO_(3)from the purified solution holds a purity of 99.21%,in comparison with 98.33%in the product from the crude solution.This purifying technology cannot only produce NH_(4)VO_(3)with high added value,but also reduce the environmental pollution of waste liquid.

关键词： Ammonium metavanadate flocculating agent phosphate arsenate cooling precipitation vanadium slag bayer alumina liquor

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RESEARCH ON CATIONIC POLYMER WATER BASE DRILLING FLUIDS

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Journal of Wuhan University of Technology(Materials Science) 1997年第Z1期12卷 94-102页

作者：刘雨晴 Research Institute of Petroleum Exploration and Development

Cationic polymer drilling fluid (CPDF) is a new water base drilling fluid in which high molecular weight (HMW) cationic polymer (CPAM) is an encapsulating and flocculating agent and organic quaternary ammonium compound (NW-1) acts as shale inhibitor. This paper describes the experimental results of cuttings recovery, particle size distribution layer spacing and Zeta potential, and discusses the inhibition of CPDF system and its major additives. The advantages of CPDF will be proved by its application in well LX-2.

关键词： cationic polymer drilling fluid high molecule encapsulating agent flocculating agent shale inhibitor application

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