Back to results
US 4,116,856 AGranted
Recovery of lithium from brines
AssigneeThe Dow Chemical Company
InventorsJohn M. Lee, William C. Bauman
Life of this patent
Estimating the term…
Abstract
An anion exchange resin, containing Al(OH).sub.3 suspended therein, is reacted with aq. LiOH to form microcrystalline LiOH.2Al(OH).sub.3 which is then reacted with a halogen acid or halide salt to form microcrystalline LiX.2Al(OH).sub.3. The resin, after having a portion of the LiX eluted by using an aqueous wash, is used to recover Li.sup.+ values from aqueous brines.
Claims9
A process for preparing a microcrystalline LiX.2Al(OH).sub.3 suspended in an anion exchange resin, the said process comprising,
- providing a particulate anion exchange resin substantially in neutral or basic form having suspended therein hydrous alumina conforming to the formula Al(OH).sub.3,
- reacting said Al(OH).sub.3 with aqueous LiOH at a temperature and for a period of time sufficient to form micro-crystalline LiOH.2Al(OH).sub.3 suspended in said resin,
- reacting the so-formed LiOH.2Al(OH).sub.3 with a halogen acid or halide salt to convert it to LiX.2Al(OH).sub.3, where X is a halide.
Dependencies are inferred from the claim text.