Continuous process for phosphorylating starch
US4216310A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1979 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Apr 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B31/066
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Starch is phosphorylated by a virtually pollution-free, continuous process whereby an aqueous reagent solution of a tripolyphosphate, orthophosphate or pyrophosphate salt or a mixture thereof is sprayed onto a moist starch cake on a rotary vacuum filter in an amount sufficient to achieve efficient impregnation of the starch cake without losing significant levels of salt to the effluent. In a preferred embodiment, the reagent solution contains alkali metal tripolyphosphate salt and is obtained by diluting a concentrated solution thereof. The thus-impregnated starch is subsequently dried and heat-reacted by known procedures to produce an orthophosphate starch monoester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.