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The manufacture of alum and the sulphates and other salts of alumina and iron; their uses and applications as mordants in dyeing and calico printing, and their other applications in the arts, manufactures, sanitary engineering, agriculture, and horticulture (1901)

Geschwind, Lucien · London : Scott, Greenwood & son; New York : D. Van Nostrand co. [etc., etc.] · leaf 175

An illustration from The manufacture of alum and the sulphates and other salts of alumina and iron; their uses and applications as mordants in dyeing and calico printing, and their other applications in the arts, manufactures, sanitary engineering, agriculture, and horticulture, 1901, leaf 175
AND SULPHATES OF IRON 1 55 lost in the residue in normal working is therefore about 2 per cent, of the mineral employed — a fairly low proportion. According to the quality of aluminium sulphate produced, and the more or less satisfactory performance of washing, the treat¬ … ment of a ton of bauxite entails a consumption of 45 to 50 cwt. of 6o° Be. sulphuric acid, the yield being about 4 tons of aluminium sulphate. D. Concentrating the Liquor. — The final stages of the work present no special difficulties. The liquid, which has a density of 33° to 34° Be., from the…

Alum · Sulphates · Dyes and dyeing · Chemistry, Technical

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