Crystalline microporous metal oxysulfide compositions
US5122357A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1991 |
| Grant date | Jun 16, 1992 |
| Priority date | — |
| Expiry date | Mar 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J29/84
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention deals with a crystalline oxysulfide composition, a process for preparing the composition, a catalyst using the composition and processes using the composition. The crystalline oxysulfide composition has a three-dimensional microporous framework structure of at least MO.sub.2, MS.sub.2, and MOS tetrahedral units, having an intracrystalline pore system and an empirical formula expressed in molar ratios: EQU (M.sub.s Al.sub.t P.sub.u Si.sub.v)S.sub.w O.sub.2-w where M is at least one metal selected from the group consisting of metals which: 1) can be incorporated into the framework structure of a microporous molecular sieve and 2) form hydrolytically stable sulfides; s, t, u, v and w are the mole fractions of M, Al, P, Si and S respectively. The oxysulfide composition is prepared by contacting a molecular sieve having an empirical formula: (M.sub.s Al.sub.t P.sub.u Si.sub.v)O.sub.2 with a sulfur containing compound such as carbonyl sulfide for a time and a temperature sufficient to sulfide a fraction of the metal. The oxysulfide compositions are useful as catalyst in hydrocarbon conversion processes such as cracking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.