Ammonium Paratungstate in the Method of the Analysis of Impurities

The spectrophotometric determination of impurities in the ammonium paratungstate, mainly determined by the reaction temperature, reaction time, NaOH concentration and stirring speed on the active ingredients wolframite tungsten leaching. Also investigated the properties of the resin in the ion exchange process, the exchange of the solution before concentration and flow rate, desorbent concentration, flow rate and temperature and other factors on the impurity removal rate during crystallization temperature paratungstate crystals.

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