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Patented Dec. 15, 1931 UNITED STATES PATENT OFFICE WILLIAM J. O'BRIEN, 0F BALTIMORE, MARYLAND, ASSIGNOR, BY MESNE ASSIGNMENTS,
What is titanium dioxide?
The zinc content in the electrolytic zinc acid leaching residue in the leaching step is 5% to 35%. In the purification step, after the primary immersion liquid is added with ammonium persulfate for one oxidation, a polyacrylamide coagulant is added before the filtration separation. It is used for flocculation to produce arsenic and iron coprecipitation to remove harmful elements.
North America
Titanium dioxide has similar uses in non-food products. It is used in sunscreen as effective protection against UVA/UVB rays from the sun, which creates a physical barrier between the sun’s rays and the skin. It’s also used to whiten paint, paper, plastic, ink, rubber, and cosmetics.
It is to be understood that the form of my invention, herewith described is to be taken as a preferred embodiment of the same, and that various changes may be resorted to in the order of the steps of the method, and that known chemical equivalents may be employed, without departing from the spirit of my invention or the scope of the subjoined claims.