Molecular sieve
US8709963B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2012 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Mar 14, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2101/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A molecular sieve including a basic skeleton of a molecular sieve and magnesium and phosphorus compounds as functional materials supported on the inner surface of the basic skeleton. A method of preparation of a modified molecular sieve including (1) dissolving a magnesium salt in water to obtain a magnesium salt solution; (2) dissolving phosphoric acid in water to obtain a phosphoric acid solution; (3) adding a molecular sieve to the magnesium salt solution, stirring, standing, drying for dehydration, and baking; and (4) adding a modified molecular sieve with supported magnesium compounds obtained from the step (3) to the phosphoric acid solution, stirring, standing, drying for dehydration, and baking to obtain a modified molecular sieve. The modified molecular sieve has high selectivity for ammonia nitrogen in wastewater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.