Alumina-based compositions and catalysts having high specific surface area
US5397758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous alumina-based compositions having high specific surface areas, well adopted for catalyst applications and prepared by precipitation/hydrothermal treatment/calcination technique, comprise an alumina matrix having from 10% to 50% by weight of at least one rare earth or alkaline earth metal second element dispersed therein, having a pore volume, corresponding to pores of a diameter less than 100 nm, ranging from 1.2 cm.sup.3 /g, at least 80% of which corresponding to pores having a diameter ranging from 10 nm to 100 nm, after heat treatment at a temperature of 350.degree. C. and having a pore volume, also corresponding to pores of a diameter less than 100 nm, ranging from 0.6 cm.sup.3 /g to 1.5 cm.sup.3 /g, at least 90% of which corresponding to pores having a diameter ranging from 20 nm to 100 nm, after heat treatment at a temperature of 1,200.degree. C. for four hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.