Process for making theta-1 zeolite
US5342596A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1981 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Dec 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel crystalline alumino silicates having the following composition in terms of the mole ratio of the oxides: EQU 0.9.+-.0.2 M.sub.2 n :Al.sub.2 O.sub.3 :x SiO.sub.2 :yH.sub.2 O wherein M is at least one cation having a valence n, x is at least 10 and y/x is between 0 and 25, said aluminosilicates having a characteristic X-ray diffraction pattern. The cation M in the aluminosilicates is preferably selected from H.sup.+, ammonium, alkali metal cations, alkaline earth metal cations, organic nitrogencontaining cations, aluminum cations, gallium cations and mixtures thereof. The invention also comprises a process for producing the aluminosilicate by mixing together a source of silica, a source of alumina, a source of alkali metal(s), water and diethanolamine until a homogeneous gel is formed and crystallizing the mixture at a temperature above 70.degree. C. for a period of at least 2 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.