Sequestering of CA.sup.++ and MG.sup.++ in aqueous media using zeolite mixtures
US4094778A · kind A · utility
13Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1977 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Jun 27, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F5/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Mixtures of zeolite A and zeolite X containing about 40 to 70 weight per cent of each species are found to exhibit a synergistic effect in the sequestering by ion exchange of calcium and magnesium ions in hard water. These zeolite mixtures can be advantageously used in detergent compositions as substitutes in part or in full for polyphosphate builders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.