Mercury adsorbents compatible as cement additives
US7767007B2 · kind B2 · utility
7Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | May 16, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Solid adsorbents, following their use for mercury removal from flue gas, that do not interfere with the ability of air-entraining additives (such as surfactants) to form stable bubbles when added to fly ash containing the adsorbents. The interference is overcome by heating the materials used in the manufacture of the adsorbent so that magnesium hydroxide and/or one or more alkali compounds containing one or more silicate, aluminate, and/or phosphate moiety, added or already present in the materials, binds multivalent cations present in the materials that could otherwise interfere with the surfactant activity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.