Alumina of high macroporosity and stability
US4868147A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A calcined and shaped alumina, exhibiting a stabilized, high pore volume and a low surace area together with high strength, is made from an alumina, such as pseudoboehmite or chi-rho-eta alumina or mixtures of different alumina species. The stabilized product exhibits a total porosity of at least about 0.4 cc/g, a surface area within the range of about 2-20 m.sup.2 /g. The porosity is stabilized by treatment of the alumina, prior to calcination, with a combination of silica and an inorganic fluoride. The stabilized alumina product can be readily utilized as an adsorbent or a catalyst support, particularly in applications where the catalyst is subjected to high temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.