Process for preparing crystalline zeolite composition ERC-2
US4552731A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1983 |
| Grant date | Nov 12, 1985 |
| Priority date | — |
| Expiry date | Nov 10, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B39/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range: PA0 0.9 to 1.1 M.sub.2/n O:Al.sub.2 O.sub.3 :2.5 to 5.1 SiO.sub.2 :xH.sub.2 O wherein M is at least one exchangeable cation, n is the valence of M, and x is 0 to 6, and characterized by having a specified X-ray powder diffraction pattern. The zeolite may be prepared by crystallization from a reaction mixture of KOH (and optionally a minor amount of NaOH), water, a source of silica, and a source of alumina preferably derived from kaolin or halloysite. Most preferably, the source of alumina is metakaolin and the source of silica is potassium silicate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.