Two step process for the preparation of zeolite A by hydrothermal treatment of clinoptilolite
US4401634A · kind A · utility
9Cited by
3References
12Claims
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Key dates
| Filing date | Jan 28, 1982 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Jan 28, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A two step hydrothermal process for the preparation of zeolite A from clinoptilolite by (1) heat treating a mixture of clinoptilolite in an aqueous solution of sodium hydroxide and filtering the mixture followed by (2) reacting the filtrate with at least 75 percent of a stoichiometric amount of sodium aluminate to form and precipitate zeolite A from solution and recovering zeolite A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.