Research on impurity element footprint and purification effect in industrial production of high purity polyphosphate
High purity polyphosphate is an important raw material and product in the fine phosphorus chemical industry,which can be used in fields such as medicine and electronic materials.By monitoring the impurity content of raw materials,production processes,and products in the production of high-purity polyphosphate,the element footprint and purification effect of impurities are studied.The results show that:Impurity As is gradually fixed and removed during the production process,with a removal rate of 99.98%,Mg is first fixed and then released,Na is completely fixed and removed,Fe is fixed and then introduced from the production equipment with external Fe,Pb and Cd have not entered the polyphosphate production system;The four indicators of high-purity polyphosphate products are all superior to the food grade phosphoric acid standard,with 16 indicators superior to the ordinary electronic grade phosphoric acid standard.
high purity polyphosphateimpurity element footprintpurification effect
NETL
NSTL
万方数据
