Particulate composition containing bleach and optical brightener and process for its manufacture
US4970019A · kind A · utility
5Cited by
30References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1988 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/394
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A manufacturing process and composition is claimed for a composition of matter comprising sodium carbonate, sodium carbonate perhydrate, a fluorescent whitening agent and a diphosphonic acid. The process comprises incorporating the fluorescent whitening agent and diphosphonic acid into aqueous hydrogen peroxide, uniformly applying the hydrogen peroxide solution to particulate sodium carbonate to form a reaction mixture, urging water vapor from the surface of the reaction mixture and maintaining the temperature of the reaction mixture between about 35.degree. C. and 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.