Magnetic particles, a method for the preparation thereof and their use in the purification of solutions
First Claim
Patent Images
1. Magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent.
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Accused Products
Abstract
Magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent. The particles may be embedded in a polymer resin which incorporates sites, which are selective for particular ions, to form composite magnetic resin particles. The composite magnetic resin particles may be used for the removal of pollutant ions from an aqueous solution in which they are contained.
74 Citations
20 Claims
- 1. Magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent.
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6. Method for the preparation of magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent, which method comprises the steps of:
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i) preparing a suspension comprising fibers of a fibrous material and a binding agent; ii) mixing core particles of a magnetic material into the suspension; iii) causing the binding agent to solidify to bind the fibers around the core particles and form the magnetic particles; and iv) separating the magnetic particles from the suspension. - View Dependent Claims (7, 8, 9, 10)
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- 11. A composite magnetic resin which comprises magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent embedded in a polymer resin which incorporates sites which are selective for particular ions.
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17. A method for the removal of ions from an aqueous solution in which they are contained, which method comprises the steps of:
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i) contacting the solution to be treated with particles of a composite magnetic resin which comprises magnetic particles which comprise a core of a magnetic material surrounded by a mixture of a fibrous material and a solid binding agent embedded in a polymer resin which incorporates sites which are selective for particular ions; ii) separating by magnetic filtration the composite magnetic resin particles from the solution; iii) subjecting the separated composite magnetic resin particles to regeneration using an appropriate regenerant solution; iv) separating the regenerated composite magnetic resin particles from the regenerant solution; and v) recycling the separated composite magnetic resin particles to step (i) of the method. - View Dependent Claims (18, 19, 20)
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Specification