Extruded alumina catalyst support having controlled distribution of pore sizes
US4301037A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1980 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Apr 1, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/504
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A thermally stable, pure transition alumina extrudate suitable for use as a catalyst support has a uniquely defined bimodal pore size distribution and very good mechanical properties. Most of the surface area is in a micropore region having pores of less than 500 Angstrom units, a pore volume of 0.60 to 0.80 cm..sup.3 /g., a narrowly defined effective pore volume distribution within this region and a median pore diameter which can be controlled within the range of 90-210 Angstrom units. The macropore region made of pores having diameters of 1,000- 10,000 Angstrom units has a pore volume of at least 0.10 cm..sup.3 /g. These two pore volumes are essentially connected directly to each other. The extrudates can be strengthened by acidic additives and given increased thermal stability by adding rare earth oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.