Crystalline sodium/aluminum acid phosphates
US4927615A · kind A · utility
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15Claims
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Inventor
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/45
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Crystalline sodium/aluminum acid phosphates having the formula: EQU Na.sub.a Al.sub.b H.sub.c (PO.sub.4).sub.d.n H.sub.2 O wherein a ranges from 0.6 to 3.3, b ranges from 1.8 to 3.3, c ranges from 12 to 16, d ranges from 7 to 9, and n ranges from 0 to 5, with the proviso that a+3b+c=3d, and especially the compound NaAl.sub.3 H.sub.14 (PO.sub.4).sub.8.4H.sub.2 O, are prepared by coating and drying an atomized precursor solution of stoichiometrically desired acid phosphate on inert solid particles comprising a fluidized bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.