Process for preparing chlorine dioxide
Abstract
Abstract An improved process for preparing chlorine dioxide is provided wherein the bulk of the reactants are internally produced. The reactants include an aqueous solution of an inorganic chlorate and aqueous hydrochloric acid. The aqueous solution of the inorganic chlorate is produced by electrolyzing an aqueous solution of an inorganic chloride. The aqueous hydrochloric acid is produced from hydrogen gas, which is a byproduct of the electrolysis reaction by which the inorganic chloride is converted to the inorganic chlorate, and chlorine gas. The chlorine gas is produced as follows: In reacting the aqueous inorganic chlorate with the aqueous hydrochloric acid, both gaseous chlorine dioxide and chlorine are formed. The gaseous chlorine is separated from the gaseous chlorine dioxide. A portion of the so-separated gaseous chlorine is reacted with the heretofore produced hydrogen to form gaseous hydrogen chloride. The gaseous hydrogen chloride is used as a reactant, either by dissolving it in a stoichiometrically insufficient quantity of water, thereby to provide an aqueous solution of hydrochloric acid and free hydrogen chloride gas, or by dissolving it in water containing absorbed chlorine gas.
Inventors
- 👤 Gothe Oscar Westerlund
Bibliographic Details
Claims Analysis
Total Claims: 10References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |