Magnetic catalysts and their preparation
AssigneeExxon Research & Engineering Co.
InventorGeorge W. Bailey
Life of this patent
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Abstract
A process wherein a magnetic iron precursor component characterized as the mineral ilmenite, FeTiO.sub.3, particularly the natural mineral ilmenite, FeTiO.sub.3, is incorporated within a refractory inorganic oxide particulate mass, notably alumina, silica, silica-alumina, aluminosilicate or precursor thereof, which serves as a matrix. The mineral can be prereduced and then formed into a composite, or said mineral can be dispersed as an inclusion, or inclusions, and the particulate composite mass then treated in a reducing atmosphere to form oriented, laminar layers of reduced iron metal intimately dispersed throughout said particulate composite mass.
Claims15
A composition of matter useful in a bed which can be fluidized by contact with a fluidizing medium while simultaneously subjected to an applied magnetic field comprising, particulate, magnetizable composite solid particles comprised of an ilmenite magnetic iron component dispersed within an inorganic oxide matrix, the iron component of the ilmenite being comprised of from about 0.05 percent to about 50 volume percent metallic iron in reduced state.
A process for the preparation of particulate, magnetizable solids particles for use in a bed which can be fluidized by contact with a fluidizing medium while simultaneously subjected to an applied magnetic field which comprises
- admixing a particulate inorganic oxide gel with a magnetic iron precursor component, comprised of ilmenite FeTiO.sub.3 to form a particulate composite mass within which said magnetic particles are dispersed as inclusions within the inorganic oxide which serves as a matrix.
Dependencies are inferred from the claim text.