Process of growing crystalline microporous solids in a fluoride-containing, substantially non-aqueous growth medium
US5320822A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1993 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Jan 29, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B39/445
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Crystalline microporous solids, such as aluminosilicate zeolites or silica molecular sieves, are grown in a fluoride-containing, substantially non-aqueous medium to form crystals on the order 0.3-3 mm in size. This growth process involves preparing a mixture containing one or more nutrients capable of forming the crystalline microporous solid, such as a source of silica and a source of alumina; water in a controlled amount; a growth medium comprising hydrogen fluoride and a nitrogen-containing organic base, such as pyridine; and optionally an organic solvent and/or a structure-directing agent; and thereafter heating the resulting mixture for a time sufficient to produce the crystalline microporous solid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.