Process for the preparation of asbestiform crystalline calcium sodium metaphosphate fiber
US4717487A · kind A · utility
9Cited by
1References
18Claims
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Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B25/45
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Asbestiform crystalline calcium sodium metaphosphate fiber is prepared by (a) forming a wet mix slurry having a composition on a dry basis equivalent to a CaO/Na.sub.2 O/P.sub.2 O.sub.5 mol percent ratio of about 24.0-34.0/12.0-18.0/50.0-60.0, with the proviso that the CaO/Na.sub.2 O mol ratio is from about 1.60 to about 2.00, (b) forming and growing product crystals of calcium sodium metaphosphate under crystal formation and growth conditions between the solid phase of the wet mix slurry and substrate crystals of calcium sodium metaphosphate, and (c) fiberizing the product crystals of calcium sodium metaphosphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.