Heat resistant layered porous silica and process for producing the same
US5382558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1993 |
| Grant date | Jan 17, 1995 |
| Priority date | — |
| Expiry date | Jul 2, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A heat resistant layered porous silica having a honeycomb porous structure comprises a plurality of waved or bent sheet layers of crystalline layered silicate superposed one after another, and the neighboring sheets are partially bonded by siloxane bonding. The spacing between the neighboring sheet layers is narrowed toward the bonded portions and expanded at other portions to thereby form fine pores. The layered porous silica contains alkali metal ions in an amount of 0.2% by weight or less and has a specific surface area of 1,000 m.sup.2 /g or more. The layered porous silica has a large specific surface area, and exhibits an excellent heat resistance and adsorption of organic substances such as fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.