Crystalline lithium aluminates
AssigneeThe Dow Chemical Company
InventorsWilliam C. Bauman, John M. Lee
Life of this patent
Estimating the term…
Abstract
Crystalline LiOH.2Al(OH.sub.3.nH.sub.2 O is reacted in aqueous solution with anions (A) having a valence of 1, 2, or 3 to form novel lithium aluminates conforming substantially to the empirical formula (LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 O where n is the number of waters of hydration, y is the number of lithium atoms present for each 2Al atoms, A has a negative valence of 1, 2, or 3, and x is the reciprocal of the valence of A.
Claims12
Crystalline lithium aluminates conforming substantially to the empirical formula
- (LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 O
- where
- A represents anions or negative-valence radicals, other than hydroxyl, having a valence of 1, 2, or 3,
- x is the reciprocal of the valence of A,
- y is a numerical value in the range of about 0.5 to about 1.2, and
- n is a value of at least about 1 for waters of hydration.
A method for preparing crystalline lithium aluminates conforming substantially to the empirical formula
- (LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 O
- wherein
- A represents anions or negative-valence radicals having a valence of 1, 2, or 3,
- x is the reciprocal of the valence of A,
- y is a numerical value in the range of about 0.5 to about 1.2, and
- n is a value of at least about 1 for waters of hydration,
- said process comprising reacting crystalline LiOH.2Al(OH).sub.3.nH.sub.2 O with anions or negative-valence radicals contained in an aqueous medium, thereby replacing the OH.sup.- ions of the crystal with anions or negative-valence from said aqueous medium.
Crystalline lithium aluminates conforming substantially to the empirical formula
- LiX.2Al(OH).sub.3.nH.sub.2 O
- where
- X is at least one anion of the group comprising hydroxide, chloride, bromide, or iodide, and n represents the number of waters of hydration.
Dependencies are inferred from the claim text.