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US 4,540,509 AGranted
Crystalline 3-layer lithium aluminates
AssigneeThe Dow Chemical Company
InventorJohn L. Burba, III
Life of this patent
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Abstract
Ion exchange resins in the base form, e.g., DOWEX MWA--1--OH ion exchange resin, which contain crystalline Al(OH).sub.3, e.g., gibbsite, and/or bayerite, and/or norstrandite, are treated with hot, concentrated LiX solutions (where X is anion) to prepare 3-layer crystalline LiX.2Al(OH).sub.3.nH.sub.2 O in the resin.
Claims12
A process for preparing crystalline 3-layer LiX.2Al(OH).sub.3.nH.sub.2 O in a macroporous ion exchange resin, said process comprising
- reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains crystalline Al(OH).sub.3 dispersed therein,
- by mixing the said composite with hot, concentrated aqueous solution of LiX, where X is an anion,
- thereby converting the crystalline Al(OH).sub.3 in the resin to crystalline 3-layer LiX.2Al(OH).sub.3.nH.sub.2 O.
A process for preparing crystalline 3-layer LiCl2Al(OH).sub.3.nH.sub.2 O in a macroporous ion exchange resin, said process comprising
- reacting a composite of a macroporous ion exchange resin, which is in its base form and which contains gibbsite dispersed therein, with a hot, concentrated aqueous solution of LiCl by mixing said composite and said solution,
- thereby converting said gibbsite in said resin to crystalline 3-layer LiCl2Al(OH).sub.3.nH.sub.2 O.
Dependencies are inferred from the claim text.