Process for improving granular detergents
US3989635A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Sep 6, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0039
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for improving the properties of granular detergents, that is, caking preventability, fluidity and particle hardness, which comprises spray-coating a coating agent [I] consisting of the silicates, sulfates, carbonates and hydroxides of alkali metals and a coating agent [II] consisting of polyvalent metal sulfates separately onto a granular detergent obtained by the conventional spray granulating method, tumbling granulating method, piston granulating method, pressure granulating method and the like, under a condition in which the granular detergent is in a fluid state; causing a reaction on the surface of the granular detergent particles; and forming thereon a coating film of a water-insoluble or poorly water-soluble substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.