Manganese Chloride Dioxide

Manganese (Manganous) Msngsnese (Manganic). Manganese Chloride. . Manganese Dioxide.. . ... 

See Manganese chloride trioxide, Manganese dichloride dioxide... 

Molecular weight of manganese dioxide, and of manganese chloride. 

Manganese dichloride tetrahydrate. See Manganese chloride (ous), tetrahydrate Manganese dinitrate. See Manganese nitrate Manganese dioxide... 

Manganese chloride (ous), anhydrous Manganese dioxide colorant, brown to violet Glycogen colorant, buccals Acid blue 9... 

This reaction is also used on a large scale, to obtain iodine from seaweed. The ash from burnt seaweed ( kelp ) is extracted with water, concentrated, and the salts other than iodides (sulphates and chlorides) crystallise out. The more soluble iodides remain and the liquor is mixed with sulphuric acid and manganese dioxide added the evolved iodine distils off and is condensed. 

Seaweeds. The eadiest successful manufacture of iodine started in 1817 using certain varieties of seaweeds. The seaweed was dried, burned, and the ash lixiviated to obtain iodine and potassium and sodium salts. The first process used was known as the kelp, or native, process. The name kelp, initially apphed to the ash of the seaweed, has been extended to include the seaweed itself. About 20 t of fresh seaweed was used to produce 5 t of air-dried product containing a mean of 0.38 wt % iodine in the form of iodides of alkah metals. The ash obtained after burning the dried seaweed contains about 1.5 wt % iodine. Chemical separation of the iodine was performed by lixiviation of the burned kelp, followed by soHd-Hquid separation and water evaporation. After separating sodium and potassium chloride, and sodium carbonate, the mother Hquor containing iodine as iodide was treated with sulfuric acid and manganese dioxide to oxidize the iodide to free iodine, which was sublimed and condensed in earthenware pipes (57). 

The most significant nonferrous use of manganese compounds is for primary batteries, where manganese dioxide is the principal constituent of the cathode mix. In the standard Leclanchn ceU, 2inc and ammonium chloride are mixed to form the electrolyte, a mixture of carbon and MnO forms the cathode, and 2inc acts as the anode (221). The principal ceU reaction is as foUows ... 

The cathode mix for a Leclanchn primary battery consists of 50—60% manganese dioxide ore, 5—10% acetylene black, 10—20% ammonium chloride, and 3—12% 2inc chloride. The remainder is water (see Batteries, primary cells). 

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