Method for the preparation of calcium-binding polycarboxy compounds based on polysaccharides, and replacements for phosphates in detergents, based on these polycarboxy compounds
US5326864A · kind A · utility
43Cited by
1References
9Claims
0Family size
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Key dates
| Filing date | Dec 7, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Dec 7, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/223
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention provides a method for the preparation of a calcium-complexing polycarboxy compound by oxidising inulin in the presence of a low concentration of hypohalite, resulting in the production of a polycarboxyinulin containing about 1.2-2.6 carboxyl groups per monosaccharide unit. The hypohalite is preferably hypobromite, which can be produced in situ by chemical or electrochemical oxidation of a catalytic amount of bromide. The polycarboxyinulin can be used as a phosphate substitute in calcium-binding agents and detergents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.