Method of preparing magnetite having a controlled particle size,

Details Method of preparing magnetite having a controlled particle size, Method of preparing magnetite having a controlled particle size,

1975-02-24

1977-05-17

Vertiz, Oscar R.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423140, 423152, C01G 4902

Patent

active

040242323

ABSTRACT:
A method is disclosed for controlling the particle size of equiaxial magnetite obtained by a process for preparing same starting from ferrous sulphate solutions, characterized in that the reaction forming the magnetite is conducted in a suspension to which .gamma. FeO(OH) has been added in such an amount that Fe of the .gamma. FeO(OH) is 0.1-10% of the Fe.sup.+.sup.+ initially present in the solution.

REFERENCES:
patent: 1392927 (1921-10-01), Fireman
patent: 2939767 (1960-06-01), Martin
patent: 3617562 (1971-11-01), Cywin et al.
patent: 3755554 (1973-08-01), Lailach et al.

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