Chemical composition and method
AssigneeEka Chemicals AB
InventorsJoel Tenney, Gunilla Jadesjö, Cecilia Bojrup Andresen
Life of this patent
Estimating the term…
Abstract
The invention relates to a novel composition useful as a feed at production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of alkali metal chlorate, from about 1 to about 7 moles/liter of hydrogen peroxide and at least one of a protective colloid, a radical scavenger or a phosphonic acid based complexing agent, wherein the pH of the aqueous solution is from about 1 to about 4. The invention also concerns a process for producing chlorine dioxide using the novel composition.
Claims32
Composition useful as a feed at production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of alkali metal chlorate, from about 1 to about 7 moles/liter of hydrogen peroxide and at least one of a protective colloid, a radical scavenger or a phosphonic acid based complexing agent, wherein the pH of the aqueous solution is from about 1 to about 4.
Composition useful as a feed for production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of alkali metal chlorate, from about 1 to about 7 moles/liter of hydrogen peroxide and at least one of from about 0.001 to about 0.5 moles/liter alkali metal stannate, from about 0.01 to about 1 mole/liter of a pyridine carboxylic acid or from about 0.1 to about 5 mmoles/liter of a phosphonic acid based complexing agent, wherein the pH of the aqueous solution is from about 1 to about 4 and the molar ratio of H2O2 to ClO3− is from about 0.2:1 to about 2:1.
Composition useful as a feed for production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of alkali metal chlorate, from about 1 to about 7 moles/liter of hydrogen peroxide and from about 0.1 to about 5 mmoles/liter of at least one phosphonic acid based complexing agent, wherein the pH of the aqueous solution is from about 1 to about 3.5 and the molar ratio of H2O2 to ClO3− is from about 0.2:1 to about 2:1.
A storage vessel containing a composition useful as a feed for production of chlorine dioxide, said composition being an aqueous solution comprising from about 1 to about 6.5 moles/liter of alkali metal chlorate, from about 1 to about 7 moles/liter of hydrogen peroxide and from about 0.1 to about 5 mmoles/liter of at least one phosphonic acid based complexing agent, wherein the pH of the aqueous solution is from about 1 to about 3.5 and the molar ratio of H2O2 to ClO3− is from about 0.2:1 to about 2:1, and wherein said composition has a rate of H2O2 decomposition, measured from the time of forming said composition, of no more than 5% in fourteen days.
Dependencies are inferred from the claim text.