. Journal . in two positions in the manufacture ofJ-ate. The raw material of nitrate, called caliche, islied with water and mother liquor from previous opera-Mis and the liquid is run out to cool in crystallisingHkR; on its way it is sometimes allowed to stand for an■lir in tanks called chulladores, chiefly for the sus-fded commou salt and other solids to deposit. AfterMi liquor is run off to the crystallising tanks, the solidthe chulladores is crude nitrate of varying t<. the length of standing. The longer the hotluor or caido has stood in the chulladores, the greaterli
. Journal . in two positions in the manufacture ofJ-ate. The raw material of nitrate, called caliche, islied with water and mother liquor from previous opera-Mis and the liquid is run out to cool in crystallisingHkR; on its way it is sometimes allowed to stand for an■lir in tanks called chulladores, chiefly for the sus-fded commou salt and other solids to deposit. AfterMi liquor is run off to the crystallising tanks, the solidthe chulladores is crude nitrate of varying t<. the length of standing. The longer the hotluor or caido has stood in the chulladores, the greaterlie proportion of nitrate to impurities. Impure nitratedso obtained in the mother liquor wells (aqua vieja)i r the hot liquid has cooled for six or seven dajs iu the< stallising tanks, from which the liquor is run off to■ a vieja wells or reservoir-, the lowest position of the ma. The liquor standing in these receptacles for a few1 - deposits further nitrate, but impregnated with salt sulphate of Fig. 1.—Sulphur Ovens in Iodine House. liquid is run off into a second tank, from which it ispumped up to a large closed iron cylinder at the top of^theiodine house. This cylindrical tank is three-quarters filled with thealkaline liquid. To the top of this tank is fixed a steamblower. The steam jet creates a partial vacuum in thecylinder, which draws sulphur dioxide from the sulphurfurnaces through the liquid. The sulphur dioxide rises byan iron flue direct from the furnaces, and is delivered by apipe passing below the surface of the liquid. The suctionshould be continued till the carbonate of the liquid is allconverted into an acid sulphite of soda. The sulphur furnace is a plain iron oven with a chimneyto it reaching up to the cylindrical tank above sulphur is put in ou an iron plate and ignited, and thedoor closed, but aperture is giveu for enough air to enterto keep the sulphur burning slowly. When the sulphiting is supposed to be completed theliquor in
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
