Method for preparing high-absorptivity silica as lutein carrier
US11439974B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2019 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
The invention discloses a preparation method of high-absorptivity silica as lutein carrier. The method includes adding sodium silicate into a synthesis kettle, introducing steam for heating while stirring, adding water, stirring for reaction to obtain a reaction substrate A, and adding sulfuric acid to the reaction substrate A to obtain reaction solution B; simultaneously adding sulfuric acid and sodium silicate into the reaction solution B, performing synthesis reaction for a given period of time, stopping feeding of sodium silicate, adding sulfuric acid only for post-acidification, and aging to obtain dilute slurry D; and filtering the dilute slurry D, washing, slurrying, drying and packaging to obtain silica microspheres as lutein carrier. The invention accurately controls each process so that the prepared high-absorptivity silica as lutein carrier has high adsorption and good dispersibility and flowability after adsorbing lutein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.