Mesoporous silicoaluminate products and production thereof by controlled acid extraction of aluminum from calcium bentonite clay
US5883035A · kind A · utility
11Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Nov 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/40
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a process of making mesoporous silico-aluminates from calcium bentonite by controlled extraction of octahedral aluminum under mild condition, by acid, preferably phosphoric acid. The mesoporous silicoaluminates contain only tetrahedral aluminum as the residual aluminum. As the result of the selective removal of the octahedral aluminum, the mesoporous silico-aluminates have several unprecedented properties compared to products produced by conventional processes either by mild acid-activation or by a removal of all the aluminum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.