Method and apparatus for shaping particles by ultrasonic cavitation
US6669122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Jul 5, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/1688
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Method of shaping solid, particulate materials, which comprises forming a raw slurry of the starting material, in a liquid which is a partial solvent of said material, and submitting the slurry to treatment by ultrasound generators to produce therein ultrasonic vibrations which shape and grind the starting, particulate material to produce a shaped slurry of ground and shaped particles. The shaped particles may be separated from their slurry by removing the partial solvent by decantation and/or filtration. The partial solvent may be a liquid in which the material to be shaped has a solubility comprised between 1 and 10, wherein the solubility is expressed as grams of material that are dissolved in 100 ml of the liquid at a temperature of 20° C. The partial solvent can be chosen from among acetone, methyl ethyl ketone, and mixtures of said solvents with one another or other solvents and/or a minor amount of water, and may also be an organic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.