Synthetic stevensite and process for preparation thereof
US5004716A · kind A · utility
6Cited by
3References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 2, 1990 |
| Grant date | Apr 2, 1991 |
| Priority date | — |
| Expiry date | Apr 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/405
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Synthetic stevensite composed of stevensite-type sodium magnesium phylosilicate of which metallic components consist essentially of magnesium, sodium and silicon. The synthetic stevensite is characterized by having an X-ray diffraction peak at a spacing of 16 to 26 .ANG. when treated with ethylene glycol. It can be produced by a process comprising hydrothermally treating an aqueous composition containing basic magnesium carbonate and a silica-sodium component selected from the group consisting of (i) sodium silicate, (ii) sodium silicate and amorphous silica, and (iii) amorphous silica and sodium silicate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.