Dispersion method and dispersing apparatus using supercritical state
US5921478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F33/45
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispersion method for uniformly dispersing solid or liquid fine particles in a solvent utilizes a supercritical fluid. A dispersoid of a solid, a liquid or the like is mixed with a solvent, and the resulting mixture is fed to a supercritical vessel. A supercritical solvent is then fed to the supercritical vessel and heated and compressed to a level higher than the critical temperature and critical pressure thereof to convert it to a supercritical fluid. The supercritical fluid and mixture of dispersoid and solvent are mixed together to form a supercritical mixture, which is released to atmospheric pressure in an explosion-crashing tank and subjected to collision within the explosion-crashing tank to efficiently disperse the dispersoid in the solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.