公开(公告)号：US4311679A

公开(公告)日：1982-01-19

申请号：US225907

申请日：1981-01-19

申请人： Paul B. Queneau ,  Leo W. Beckstead ,  Dale K. Huggins

发明人： Paul B. Queneau ,  Leo W. Beckstead ,  Dale K. Huggins

IPC分类号： C01G41/00

CPC分类号： C01G41/00

摘要： Basic sodium tungstate leach liquor is treated to reduce the concentration dissolved therein of silica, phosphorus and fluorine impurities in a process which comprises providing a small but effective amount of magnesium in the liquor to maximize removal of silica and phosphorus from solution in the liquor while maintaining the liquor temperature between about 60.degree. C. and about 100.degree. C. and the liquor pH between about 9 and about 11, filtering the liquor, adjusting the liquor pH to between about 6 and about 8 and the liquor temperature to between about 20.degree. C. and about 60.degree. C., and then providing a small but effective amount of aluminum hydroxide in the filtered liquor to maximize removal of fluorine from solution in the liquor while maintaining the liquor temperature between about 20.degree. C. and about 60.degree. C. and the liquor pH between about 6 and about 8.

摘要翻译： 处理基本的钨酸钠浸出液以减少溶解在其中的二氧化硅，磷和氟杂质的浓度，其中包括在液体中提供少量但有效量的镁以最大程度地从液体中的溶液中除去二氧化硅和磷，同时保持 液体温度在约60℃至约100℃之间，液体pH在约9至约11之间，过滤液体，将液体pH调节至约6至约8，液体温度至约20℃ 然后在过滤液中提供少量但有效量的氢氧化铝，以最大程度地从液体中的溶液中除去氟，同时保持液温在约20℃至约60℃之间 并且酒的pH在约6和约8之间。

公开(公告)号：US4303623A

公开(公告)日：1981-12-01

申请号：US225915

申请日：1981-01-19

申请人： Dale K. Huggins ,  Paul B. Queneau ,  Robert C. Ziegler ,  Leo W. Beckstead ,  Robert F. Hogsett

发明人： Dale K. Huggins ,  Paul B. Queneau ,  Robert C. Ziegler ,  Leo W. Beckstead ,  Robert F. Hogsett

IPC分类号： C01G39/06 ,  C01G41/00 ,  C22B34/34 ,  C22B34/36 ,  C01G39/00

CPC分类号： C22B34/34 ,  C01G39/06 ,  C01G41/00 ,  C22B34/36

摘要： Dissolved molybdenum is removed from sodium tungstate solutions by adding sulfuric acid to lower the pH value of the solution to between about 8 and about 5, adding to the sodium tungstate solution a water-soluble sulfide in an amount of at least 0.5 gram per liter (gpl) in excess of that required to precipitate as sulfides molybdenum and certain other metals, then lowering the pH value of the sodium tungstate solution to between about 4.0 and about 1.5 as rapidly as possible with sulfuric acid in such a way as to precipitate molybdenum trisulfide while minimizing co-precipitation of tungsten.

摘要翻译： 通过加入硫酸将溶解的钼从钨酸钠溶液中除去，将溶液的pH值降低至约8至约5之间，向钨酸钠溶液中加入至少0.5克/升的水溶性硫化物（ gpl）超过硫化物钼和某些其他金属沉淀所需的量，然后使硫酸钠溶液的pH值尽可能快地降低到约4.0和约1.5之间，以使三硫化钼沉淀 同时最小化钨的共沉淀。