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US 4,348,296 AGranted
Crystalline lithium aluminates
AssigneeThe Dow Chemical Company
InventorsWilliam C. Bauman, John M. Lee, John L. Burba, III
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Abstract
Porous substrates containing seeds of hydrous crystalline alumina are contacted with an aqueous solution of alkaline aluminate, thereby causing additional crystalline hydrous alumina to grow on the seeds within the pores of the substrate.
Claims17
A process for growing crystalline hydrous alumina within the pores of a porous substrate, said process comprising
- providing a seed of crystalline hydrous alumina in said pores by the in-situ precipitation of soluble Al values, thereby forming amorphous hydrous alumina,
- converting the so-formed amorphous hydrous alumina to crystalline hydrous alumina by heating, and
- adding to the seed-bearing substrate on aqueous solution of an alkaline aluminate, thereby providing aluminum oxide values which grow additional quantities of crystalline hydrous alumina on the crystalline hydrous alumina seeds.
Dependencies are inferred from the claim text.