• 专利标题:   Preparation of ammonium paratungstate involves weighing tungsten trioxide as anode electrode and graphene-modified carbon rod as cathode electrode and catalyzing, introducing ammonia gas, washing using ammonium salt solution and drying.
  • 专利号:   CN109019691-A
  • 发明人:   DING W, ZOU Y, WANG S, GUO R, FENG Z
  • 专利权人:   JIANGXI XIUSHUI GANBEI TUNGSTEN IND CO
  • 国际专利分类:   C01G041/00
  • 专利详细信息:   CN109019691-A 18 Dec 2018 C01G-041/00 201918 Pages: 7 Chinese
  • 申请详细信息:   CN109019691-A CN11179682 10 Oct 2018
  • 优先权号:   CN11179682

▎ 摘  要

NOVELTY - The preparation process of ammonium paratungstate involves weighing tungsten trioxide as anode electrode and graphene-modified carbon rod as cathode electrode and then catalyzing to obtain sodium tungstate, introducing ammonia gas into sodium tungstate, maintaining temperature at 3-10 degrees C and then filtering, separating to obtain crude ammonium paratungstate and then decomposing, washing using ammonium salt solution and deionized water, analyzing using resolving agent and then recrystallizing at 82-85 degrees C and decomposing. USE - The process is useful for preparation of ammonium paratungstate. ADVANTAGE - The process enables economical preparation of ammonium paratungstate with high purity.