Granulation of sodium metasilicate
US4253849A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1978 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Sep 26, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/325
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Sodium metasilicate is granulated by (i) establishing, in a first zone, a cloud of anhydrous sodium metasilicate powder; (ii) injecting into said cloud (i), and intimately contacting therewith, an atomized liquid phase which comprises a liquid formulation of a sodium silicate; (iii) said intimate contacting (ii) being conducted in an atmosphere of a drying gas, whereby crystallization of the anhydrous metasilicate and agglomeration of the thus coated particulates are effected, (iv) next subjecting the effluent cohered granules of said first zone to a state of agitation in a second discrete zone, in an atmosphere of a heating gas and whereby the agitated granules are at least partially converted to the sodium metasilicate pentahydrate; (v) and thence recovering from said second discrete zone a granular sodium metasilicate comprising from about 2 to 6% by weight water, and useful in the manufacture of a variety of detergent compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.