Granular calcium hypochlorite coated with an inorganic salt by spray graining
US4174411A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1975 |
| Grant date | Nov 13, 1979 |
| Priority date | — |
| Expiry date | Feb 10, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process is described in which granular calcium hypochlorite particles are encapsulated with a plurality of layers of an inorganic salt other than calcium hypochlorite. In this process granular calcium hypochlorite particles are placed in a moving bed and a portion of the moving bed is lifted to the upper part of a distributing zone and released to fall downwardly through the distributing zone to the moving bed. An aqueous medium of the inorganic salt is sprayed onto the falling particles at a temperature sufficiently high to simultaneously evaporate and remove water from the aqueous medium and to provide a coating of a plurality of layers of inorganic salt in solid form on each calcium hypochlorite particle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.