Manganate meaning

A process for purifying and decolorizing the juice expressed from beetroots by the addition of a small quantity of manganate of lime (20 to 50 grammes per hectolitre of juice), under the influence of an electric current, was worked with considerable success in a sugar factory in the department of Seine-et-Marne in the year 1900-1901.

Jour., 1870, 196, p. 230), in which air is drawn over a heated mixture of manganese dioxide and sodium hydroxide, the sodium manganate so formed being then heated to about 450° C. in a current of steam, the following reversible reaction taking place: 4NaOH+2Mn02+ 022Na2Mn04+2H20.

The potassium salt, KMnO 4, may be prepared by passing chlorine or carbon dioxide through an aqueous solution of potassium manganate, or by the electrolytic oxidation of the manganate at the anode [German patent 101710 (1898)].

Barium Permanganate, BaMn 2 0 8, crystallizes in almost black needles, and is formed by passing carbon dioxide through water containing suspended barium manganate.

manganate ion, MnO 4 - loses two oxygen atoms and is reduced to insoluble manganese dioxide MnO 2.