PREPARATION OF AMMONIUM PARATUNGSTATE WITH COARSE GRAIN BY EVAPORATING CRYSTALLIZATION

来源期刊：中南大学学报(英文版)1997年第1期

论文作者：Li Yunjiao Sun Peimei Li Honggui Su Pengtuan Zhao Zhongwei Liu Maosheng

文章页码：32 - 35

Key words：evaporating crystallization;coarse grain; ammonium paratungstate

Abstract: A new technology for the crystallization of ammonium paratungstate with coarse grain has beenstudied. The factors influencing the physi-chemical properties of ammonium paratungstate crystal, such astemperature, 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 36-42μm and apparent density of 2. 0-2. 2 g·cm- 3 were obtained by controlling suitable technological parameters.