Magnetic beneficiation of clays utilizing magnetic particulates
US4225426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1978 |
| Grant date | Sep 30, 1980 |
| Priority date | — |
| Expiry date | Feb 2, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C1/01
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for magnetically separating titaniferous discolorants from a crude kaolin clay. A dispersed aqueous slurry of the clay is formed and ferrimagnetic particles are thereupon spontaneously coflocculated with the titaniferous discolorants by seeding the slurry with a system of said particles. The system includes predominantly sub-micron size particles, and the particles further, have an isoelectric point in relation to that of the titaniferous discolorants to enable the spontaneous coflocculation. The slurry is thereupon passed through a porous ferromagnetic matrix in the presence of a magnetic field, to separate the coflocculated particles and discolorants at the matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.