Methods and apparatus for low heat spray drying
US9332776B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2015 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Jan 27, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B1/3431
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Methods and apparatus provide for spray drying a liquid product into a dried powder without applying heat, including: forming a slurry including a liquid solvent, a carrier, and an active ingredient; applying an electrostatic charge to the slurry; atomizing the charged slurry to produce a plurality of electrostatically charged, wet particles; suspending the electrostatically charged, wet particles for a sufficient time to permit repulsive forces induced by the electrostatic charge on at least some wet particles to cause at least some of such particles to divide into wet sub-particles; and continuing the suspending step, without the presence of any heated drying fluids, for a sufficient time to drive off a sufficient amount of the liquid solvent within most of the wet particles to leave a plurality of dried particles (the powder), each dried particle containing the active ingredient encapsulated within the carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.