Processes for preparing sodium percarbonate
US4190635A · kind A · utility
3Cited by
3References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Jan 11, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B15/103
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Improved processes for preparing sodium percarbonate, 2Na.sub.2 CO.sub.3.3H.sub.2 O.sub.2, which can have an apparent density of 0.6 to 1 g/cm.sup.3 and a mean particle diameter of 210 to 610 microns, which processes comprise treating a sodium carbonate monohydrate or hydrate having 75 to 90% of Na.sub.2 CO.sub.3 and having a density equal to or even greater than 1.2 g/cm.sup.3 with 60 to 80% aqueous hydrogen peroxide, the reaction mixture containing a small quantity of nonionic surfactant stable in hydrogen peroxide and alkaline solutions, the percarbonate formed being well adapted for use in detergent compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.