MFI-type zeolite and its preparation process
US5338525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1992 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Oct 16, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2229/42
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Synthetic crystalline zeolite of the MFI type and its preparation process, said zeolite being characterized by: PA0 a) the following approximate general formula: EQU M.sup.+.sub.(x+y) [Si.sub.(96-(x+y)) Al.sub.x Ga.sub.y 0.sub.192 ].sup.(x+y).sup.- PA0 in which M represents an alkaline cation and/or ammonium cation and/or a proton, x is a number between 0 and 24, y is a number between 0 and 24, (x+y) is a number between 0.64 and 24 and preferably between 1.88 and 19.2, PA0 b) a X-ray diagram of its ammonium form shown in Table I of the description and PA0 c) a fluorine content of its ammonium form between approximately 0.01 and 2.0% by weight, said zeolite having been synthesized in a fluoride medium and in the absence of an organic agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.