Zirconia-pillared clays and micas
US5248644A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1992 |
| Grant date | Sep 28, 1993 |
| Priority date | — |
| Expiry date | Apr 13, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/049
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is directed to improved zirconia-pillared clays exhibiting high crystallinity and layer spacing and significantly higher thermal stability prepared using zirconyl acetate as the pillaring agent by: (a) mixing a clay selected from the group consisting of smectite clays and fluoromicas with a solution of zirconyl acetate for a time and at a temperature sufficient to form a pillared clay product; (b) separating said pillared clay product formed from the solution; (c) washing the separated pillared clay product with water; (d) drying the separated, washed pillared clay product at a temperature from about 50.degree. to 200.degree. C.; (e) calcining the dried pillared clay product at a temperature from about 300.degree. to 700.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.