Porous materials and methods for forming the same
US6534025B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 20, 2000 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Sep 20, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous materials having a metal oxide skeleton are taught that have various water vapor adsorption capacities defined by the amount of adsorbed water vapor at a specific relative vapor pressure in a water vapor adsorption isotherm. A preferred porous material has a water vapor adsorption capacity that is less than or equal to 0.1 g/g at a relative vapor pressure of 10%, and greater than or equal to 0.2 g/g at a relative vapor pressure of 28%. Methods of making such porous materials are also taught. A preferred method for forming a porous material includes condensing a skeleton starting material for the porous material, in the presence of a surfactant, in a solution which has a concentration of the skeleton starting material in the solution that is less than or equal to 0.4 mol/L and a molar ratio of the surfactant to the skeleton starting material that is greater than or equal to 0.05 and less than or equal to 50, to form a condensate and removing the surfactant from the condensate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.