Natural red coloring matter and its processing method
US5264212A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 3, 1991 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Oct 3, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23L27/11
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
Impurities containing a pungent taste component are removed from a hot red pepper oleoresin as a starting material therefrom by a supercritical gas extraction method using a carbon dioxide as an extracting reagent, and the extraction residue is used as a red coloring matter. Even when the hot red pepper is used as the raw material, the invention can provide a natural red coloring matter evaluated as having "no pungent taste" by an organoleptic test. When the natural red coloring matter is prepared from the hot red pepper as the raw material by the supercritical gas extraction method, the invention can drastically reduce the gas pressure of the extracting reagent in comparison with the prior art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.