Process for extracting tungsten or molybdenum from solution
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 7, 1985
Grant Date -
N/A
app pub date -
Dec 9, 1980
filing date -
Dec 9, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for the recovery of molybdenum and/or tungsten from a solution which comprises the steps of passing said solution through a packed column containing an adsorbent; adsorbing tungsten and/or molybdenum on said adsorbent; passing a solution depleted in tungsten and/or molybdenum from said column; passing a stripping solution through said column containing tungsten and/or molybdenum on said adsorbent to remove tungsten and/or molybdenum with said stripping solution; repeating the first four steps until the stripping solution contains at least about 1 gram per liter of tungsten and/or molybdenum; passing said solution containing at least about 1 gram of tungsten and/or molybdenum per liter into a recovery zone; adjusting the pH of said stripping solution containing at least about 1 gram per liter of tungsten and/or molybdenum to approximately 13.0 by addition of a strong acid and thereby raising the temperature of said solution at least about 10.degree. C.; adding a calcium ion-containing solution to said pH adjusted solution to precipitate calcium tungstate and/or calcium molybdate; and, recovering said tungsten and/or molybdenum as calcium tungstate and/or calcium molybdate.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully