Magnetic field and field gradient enhanced centrifugation solid-liquid separations
AssigneeE. I. Du Pont de Nemours and Company
InventorsBenjamin C. Fuchs, Christian Hoffmann, Karsten Keller, Christopher M. Rey
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Abstract
This invention relates to a continuous or batch centrifugation solid-liquid separation process comprising simultaneously subjecting the solid-liquid mixture to localized magnetic field gradients and the centrifugation and to improved centrifugation solid-liquid separation processes wherein the improvement comprises simultaneously subjecting the solid-liquid mixture to a homogeneous magnetic field, a magnetic field gradient or both prior to and/or during the centrifugation.
Claims40
A process for the centrifugal separation of magnetic particles from a solid-liquid mixture that resides in a container, comprising (a) subjecting the mixture to a magnetic field from a source external to the container, (b) rotating a magnetic matrix within the container;
- and (c) rotating the container.
A process for the centrifugal separation of magnetic particles from a solid-liquid mixture that resides in a container and is subject to a magnetic field, comprising (a) rotating the container and/or rotating a magnetic matrix within the container, and (b) subjecting the mixture to a homogeneous magnetic field, or both a homogeneous magnetic field and a magnetic field gradient, prior to, and during the time of, the rotation of the container and/or magnetic matrix.
A process for the centrifugal separation of magnetic particles from a solid-liquid mixture that resides in a cylindrical container and is subject to a magnetic field;
- wherein the container has an opening about its circumference;
- comprising (a) rotating within the container a magnetic matrix that extends to or through the opening;
- (b) adhering particles to the magnetic matrix and moving the particles on the magnetic matrix toward the circumferential opening;
- and (c) passing the particles out through the circumferential opening.
Dependencies are inferred from the claim text.