Magnetically supported particle matrix for accumulating or affecting substances dissolved or finely dispersed in a liquid or gas
US4201827A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1977 |
| Grant date | May 6, 1980 |
| Priority date | — |
| Expiry date | Nov 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/673
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A supporting web of synthetic fibers in which a permanently magnetic powder s embedded is used to hold fine magnetic particles in a matrix for interaction with dissolved or dispersed substances present in a liquid or gas flowing through the matrix. The magnetic force in the supporting web produced by the embedded powder lends flow resistance to the adhering particle matrix making it possible to use smaller particles effectively. Catalytic effects can be produced if the magnetic particles are coated with a nonmagnetic material having a catalytic effect for the dissolved or suspended substance, as the coating does not interfere with the tenacity of the magnetically supported matrix. A matrix with particles of a ferrimagnetic compound are useful for removal of metal ions and metal complex ions from water solution as for example uranium. Ferrimagnetic or ferromagnetic matrix particles may be provided with a coating of an ion exchange material or with some other nonmagnetic material, as for example titanium oxide to approve the adsorption of metal ions. A catalyst coating can similarly be provided for the matrix particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.