Inverse limited coalescence process

Details Inverse limited coalescence process Inverse limited coalescence process

1994-09-20

1996-11-19

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6251R, 252 6256, 252 6254, 2523014R, 2523014S, 23313R, 430137, C04B 3526

Patent

active

055759408

ABSTRACT:
Particles having a controlled particle size distribution and morphology are made from inorganic hydrophilic materials by dispersing inorganic hydrophilic material in a dispersant to form a dispersion phase, and mixing the dispersion phase with a substantially water-immiscible suspending liquid, which is less polar than the dispersant, to form a suspension of dispersion phase droplets in the suspending liquid. The dispersion phase droplets are stabilized by a dispersion of an organic colloidal stabilizer which is added either to the suspending liquid before mixing or to the suspension of dispersion phase droplets after mixing. The organic stabilizer limits the coalescence of the dispersion phase droplets. The dispersant is removed to form solid inorganic particles having a controlled particle size distribution and morphology.

REFERENCES:
patent: 4345014 (1982-08-01), Oka et al.
patent: 4507396 (1985-03-01), Hickson
patent: 4546060 (1985-10-01), Miskinis et al.
patent: 5061586 (1991-10-01), Saha et al.
patent: 5268249 (1993-12-01), Saha et al.
patent: 5764445 (1988-08-01), Miskinis et al.

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