Method to dissolve solid iron oxides

Details Method to dissolve solid iron oxides Method to dissolve solid iron oxides

1991-05-17

1991-11-26

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

C25F 106

Patent

active

050680170

ABSTRACT:
A sample of hematite (Fe.sub.2 O.sub.3) is submerged in a solution containing about 14-55% by volume H.sub.3 PO.sub.4 balance water, or 12-45% by weight of H.sub.3 C.sub.6 H.sub.5 O.sub.7 and water, or a combination of both acids. A negative direct current electron flow above about 12 milliamps is established to the hematite as a cathode. The positive electrode can be constructed of copper to reduce oxygen emission from the reaction and is located in proximity but elsewhere. After a reaction time of about 60-120 minutes at about a 30 volt continuous direct charge, a weight loss of about from 0.3-0.5 grams should be measured from the hematite. An increase in current increases weight loss per comparable time unit measure.

REFERENCES:
patent: 1195704 (1916-08-01), Marino
patent: 4264418 (1981-04-01), Wood et al.
patent: 4544462 (1985-10-01), Furutani et al.

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