Method for removing dibasic calcium hypochlorite scale
US4483715A · kind A · utility
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15Claims
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Key dates
| Filing date | Aug 1, 1983 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Aug 1, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B11/064
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Dibasic calcium hypochlorite scale found on the surfaces of process equipment used for the manufacture of calcium hypochlorite is removed chemically by submerging the scale in water, thereby to form an aqueous alkaline solution, and controllably adding hydrochloric acid to the alkaline solution under conditions of agitation and while maintaining the pH of the solution at at least 7, thereby to solubilize the dibasic calcium hypochlorite scale without producing substantial amounts of elemental chlorine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.