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US 9,040,154 B2Granted
Magnetic composite particles
AssigneeNeotechnology
InventorsPeter Rogin, Peter William de Oliveira, Christian Wühr, Michael Veith, Douglas Espin
Life of this patent
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Abstract
Magnetic composite particles can be used as proppants and allow for deliberate heating by applying an alternating magnetic field.
Claims17
Magnetic composite particles comprising composite particles comprising at least one magnetic object and a vitreous binder phase, wherein the composite particles have a diameter between 0.1 and 50 mm and wherein the proportion of at least one magnetic object in relation to the vitreous binder phase, measured by % by weight, is between 1:1 and 4:1.
A process for producing magnetic composite particles, comprising:
- a) producing a composition from at least one magnetic object and/or a precursor for a magnetic object and at least one precursor of a vitreous binder phase;
- b) producing granules from the composition;
- and
- c) heat treating the granules to form the vitreous binder phase,
- wherein the proportion of the at least one magnetic object in relation to the vitreous binder phase, measured by % by weight, is between 1:1 and 4:1.
2 more elements
Dependencies are inferred from the claim text.