Method for solidifying and stabilizing a concentrated aqueous sodium hydroxide solution
US7812209B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2006 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jun 14, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the solidification and stabilization of concentrated aqueous sodium hydroxide solution, characterized in that the following steps are carried out:a) a hydraulic binder containing blast furnace slag is mixed with said sodium hydroxide solution, in the presence of at least one additional source of calcium ions and/or magnesium ions and/or silica, to form a slurry, andb) the slurry is left to set to a solid product.The invention further relates to the solid product obtained by carrying out the process of the invention. The invention can be applied to the treatment of sodium hydroxide solutions that are radioactive or contaminated by other pollutants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.