Method of magnetizing nonmagnetic materials

Details Method of magnetizing nonmagnetic materials Method of magnetizing nonmagnetic materials

1988-10-24

1990-03-06

Cashion, Jr., Merrell C.

Liquid purification or separation

Processes

Using magnetic force

209214, 427127, B01D 3704

Patent

active

049063820

ABSTRACT:
Particles of a nonmagnetic material are rendered magnetic by contacting their surfaces with a magnetizing reagent comprising water containing particles of a magnetic material, each of which has a two layer surfactant coating including an inner layer and an outer layer. The inner layer covers the magnetic particle and is a monomolecular layer of a first water soluble, organic, heteropolar surfactant containing at least 3 carbon atoms and having a functional group on one end which bonds with the magnetic particle. The outer layer coats the inner layer and is a monomolecular layer of a second water soluble, organic heteropolar surfactant containing at least three carbon atoms and having a hydrophobic end bonded to the hydrophobic end of the first surfactant and a functional group on the other end capable of bonding with the particles to be magnetized.

REFERENCES:
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patent: 3926789 (1975-12-01), Shubert
patent: 3988240 (1976-10-01), Fraas
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patent: 4235710 (1980-11-01), Sun
patent: 4285819 (1981-08-01), Yen
patent: 4298478 (1981-11-01), Watson
patent: 4366065 (1982-12-01), Leslie
patent: 4388179 (1983-06-01), Lewis
patent: 4502958 (1985-03-01), Sasaki

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