Method for producing crystalline, inorganic ion exchange material
US5939040A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Aug 26, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/36
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing a crystalline, inorganic ion exchange material having the following composition: x.sub.1 K.sub.2 O.x.sub.2 Na.sub.2 O.ySiO.sub.2. zMeO, wherein x.sub.1, x.sub.2, y and z are numerical values satisfying the following relationships: y/(x.sub.1 +x.sub.2)=1.0 to 2.1, z/y=0 to 1.0, x.sub.1 /x.sub.2 =0.01 to 2.0, and Me stands for Ca and/or Mg, the method including the steps of adding and blending one or more alkali metal compounds, or one or more alkali metal compounds and one or more alkaline earth metal compounds in cullets having a composition of SiO.sub.2 /Na.sub.2 O=1.5 to 4.2, and baking the resulting mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.