Claims
- 1. An aqueous solution of chlorine dioxide originating from a chlorine dioxide generating process having a purity with respect to chlorine dioxide of at least about 95% and acidified by the presence of at least one acidic or acidity-generating component to provide a pH of about 2.2 to about 3.9, wherein the chlorine dioxide generating process is hydrogen-peroxide based and chlorine and hydrogen peroxide present in the chlorine dioxide solution in a product storage tank react to form hydrochloric acid, which is the acidic or acidic-forming component, and wherein the aqueous chlorine dioxide solution is rendered substantially free from hydrogen peroxide.
- 2. The aqueous solution of claim 1 wherein said purity is at least about 98%.
- 3. The aqueous solution of claim 1 having a chlorine dioxide concentration of from about 4 to about 15 g/L ClO2.
- 4. The aqueous solution of claim 3 having a chlorine dioxide concentration of about 5 to about 12 g/L ClO2.
- 5. The aqueous solution of claim 1 wherein said acidic or acidic-generating component is present in said aqueous chlorine dioxide solution as a by-product or an intermediate formed in a chlorine dioxide generation system and is transferred to a product storage tank together with the chlorine dioxide.
- 6. The aqueous solution of claim 5 wherein said by-product or intermediate is chlorine which is cogenerated with chlorine dioxide.
- 7. The aqueous solution of claim 6 wherein said chlorine is cogenerated with the chlorine dioxide by the addition of not more than about 2 wt % sodium chloride to the chlorine dioxide generating solution of the process.
- 8. The aqueous solution of claim 1 wherein hydrogen peroxide is removed from the aqueous chlorine dioxide solution by a oxidation.
Parent Case Info
This application claims the benefit of the provisional application No. 60/179,412 filed on Feb. 1, 2000.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
63-008203 |
Jan 1988 |
JP |
Non-Patent Literature Citations (2)
Entry |
Weast, R.C., “CRC Handbook of Chemistry and Physics”, 52nd edition, p. D-105, 1971 (no month).* |
W.J. Masschelein's basic textbook entitled: “Chlorine Dioxide. Chemistry and Environmental Impact of Oxychlorine Compounds”, pp. 112 to 145. 1979 (no month). |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/179412 |
Feb 2000 |
US |