Massive bodies containing free halogen source for producing highly converted solutions of chlorine dioxide
US6699404B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Jun 17, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N59/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A massive body, e.g., a tablet, for producing a solution of chlorine dioxide when the massive body is added to liquid water. The massive body comprises a metal chlorite such as sodium chlorite, an acid source such as sodium bisulfate and a source of free halogen such as the sodium salt of dichloroisocyanuric acid or a hydrate thereof. The concentration of free halogen in the solution will be:(a) less than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.25:1 by weight; or(b) equal to or greater than the concentration of chlorine dioxide in said solution on a weight basis and the ratio of the concentration of chlorine dioxide to the sum of the concentrations of chlorine dioxide and chlorite anion in said solution is at least 0.50:1 by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.