Method and apparatus for enhanced size reduction of particles
US8535720B2 · kind B2 · utility
1Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2004 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Feb 22, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2389/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides methods and apparatus for producing particles via supercritical fluid processing. In one embodiment, the method includes expanding a supercritical fluid plasticized melt across a pressure drop to form solid composite particles that are simultaneously dispersed, foamed and cooled, and milling the solid particles produced to achieve the desired size distribution. In another embodiment, a pressure vessel containing a supercritical fluid plasticized melt is depressurized to form a cooled solid porous mass, which is then milled to obtain solid composite particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.