Micro encapsulation using high-voltage, low-current, high frequency alternating-current spray atomization
US12201134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2021 |
| Grant date | Jan 21, 2025 |
| Priority date | — |
| Expiry date | Feb 3, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/043
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a spray drying system and process for encapsulating a core material, such as a volatile flavor oil, within a carrier or wall material. The process is achieved by atomizing a liquid emulsion comprising the core material, the wall material, and a liquid solvent, applying a high-voltage, low-current, high frequency alternating-current charge or a high-voltage, low-current, low frequency alternating-current charge at the site of atomization, and drying the atomized emulsion into an encapsulated, free-flowing powder. Applying a high-voltage, low current alternating-current at the site of atomization allows the spray drying to be accomplished at significantly reduced temperatures, in particular, at inlet temperatures in the range of 25° C. to 150° C., and outlet temperatures in the range of 25° C. to 110° C. The low drying temperatures impart improvements in the resulting encapsulated powdered product, including better retention of volatile flavor components, a flavor profile comparable to that of the starting liquid formulation, and better hydration and dissolution in water-based applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.