Heat-resistant catalyst carrier moldings and catalysts for combustion
US4959338A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1988 |
| Grant date | Sep 25, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/66
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a heat-resistant catalyst carrier and a catalyst carrier molding comprising silica and alumina, in which a silica content is in a range of 2% by weight to 30% by weight, and an overall pore volume is at least 0.3 ml/g and a volume of pores having a diameter of 100 .ANG. or larger accounts for at least 60% of the overall pore volume, or which have a specific surface area of at least 20 m.sup.2 /g after firing at 1200.degree. C. in air, or which show a peak area at -110 ppm to -130 ppm which is 0 to 10% with respect to a peak area at -50 ppm to -130 ppm, as measured by the nuclear magnetic resonance (.sup.29 Si-NMR) method using silicone rubber (-21.9 ppm) as a reference peak after firing at 500.degree. C. in air, and is also concerned with a catalyst for combustion comprising the same. The catalyst carriers and moldings can retain large pore volume and specific surface area even upon held under high-temperature and --humidity conditions over an extended period of time, while the catalysts for combustion can retain high reactivity with reduced or limited deactivation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.