Research on analytical method for solid-phase conversion rate of rare earth in novel technology of rare earth sulphate solid-
phase transition
WANG Xiu-yan1，LIU Jie-min*1 ，DU Jian1，WU Yong-ming2，ZHANG Xiao-ying2
1. The School of Chemical and Biological Engineering，University of Science and Technology Beijing，Beijing 100083, China; 2. The
Center of Chemical Analysis，University of Science and Technology Beijing，Beijing 100083, China
Abstract：Three analytical methods including barium sulfate gravimetry, EDTA titrimetry and infrared absorption were used to determine the
solid-phase conversion rate of rare earth in a novel technology of rare earth manufactured by ammonium hydrogen carbonate solid-
phase conversion from rare earth sulphate roasted ore. The experimental results indicated that the solid-phase conversion rate of
rare earth obtained by determining carbon content in converted crude rare earth carbonate by infrared absorption method could
truly reflect the state of solid-phase conversion of rare earth and could meet the requirements of new technology for
manufacturing rare earth by ammonium bicarbonate solid-phase conversion.
