Abstract
A new technology for the crystallization of ammonium paratungstate with coarse grain has been studied. The factors influencing the physi-chemical properties of ammonium paratungstate crystal, such as temperature, concentration, seed crystal, agitation, etc. were examined. It is necessary to keep high temperature and low concentration in the process, and the addition of seed crystal and agitation with air is also in favor of the system. Ammonium paratungstate crystal with particle size of 36–42 µm and apparent density of 2.0–2.2 g · cm−3 were obtained by controlling suitable technological parameters.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Basu A K, Sate F R. Characterization of ammonium paratungstate powder. J Meter Sci, 1975,8(4):571–577
Wei Qingyu. A review on controlling of the particle size and producing of the coarse grain of ammonium paratungstate. Rare Metals and Cemented Carbides, 1989(1):19–21
Zhang Farao, Wu Bingqian. Study on the formation of ammonium paratungstate crystal with coarse grain. Rare Metals and Cemented Carbides (in Chinese), 1988(3):1–4
Yu Nongfan, Wei Guanjin. Production of coarse grain ammonium paratungstate. Zhongguo Wuye (in Chinese), 1994 (3):16–19
Author information
Authors and Affiliations
Additional information
Synopsis of the first author Li Yunjiao, associate professor, born in 1963, majoring in metallurgy of non-ferrous metals, hydrometallurgy, and mechanicochemstry.
Rights and permissions
About this article
Cite this article
Li, Y., Sun, P., Li, H. et al. Preparation of ammonium paratungstate with coarse grain by evaporating crystallization. J Cent. South Univ. Technol. 4, 32–35 (1997). https://doi.org/10.1007/s11771-997-0026-z
Received:
Issue Date:
DOI: https://doi.org/10.1007/s11771-997-0026-z