Chabazite-type zeolite and process for producing the same
US10029247B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2009 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Feb 8, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A subject for the invention is to provide a chabazite-type zeolite that is expected to have durability and thermal resistance, which are practical properties required of catalyst supports and adsorbent bases, and that has profitability. A chabazite-type zeolite having an SiO2/Al2O3 molar ratio of 15-50 and an average particle diameter size of 1.5 μm or more has high durability and high thermal resistance. Such a chabazite-type zeolite can be produced by crystallizing a starting-material composition in which the molar ratios of a structure-directing agent and water to SiO2 satisfy 0.05≤(structure-directing agent)/SiO2<0.13 and5≤H2O/SiO2<30, in the presence of at least one kind of alkali metal ions selected from the group consisting of K, Rb, and Cs. The structure-directing agent preferably is an N,N,N-trimethyladamantaneammonium salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.