A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . The sublimation is never continued until the whole of the salt has been volatilized, sincethe heat required would decompose the carbonaceous impurities, and they, emitting volatileoily hydrocaibons, diminish the purity of the product. In consequence of this incompletesubUmation, a conical mass (shown in Jig. 29) is left behind, called the yolk. After 29. cooling, the dome of the pot is taken off, and the attached cake carefully removed. Thiscake, which is from 3
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . The sublimation is never continued until the whole of the salt has been volatilized, sincethe heat required would decompose the carbonaceous impurities, and they, emitting volatileoily hydrocaibons, diminish the purity of the product. In consequence of this incompletesubUmation, a conical mass (shown in Jig. 29) is left behind, called the yolk. After 29. cooling, the dome of the pot is taken off, and the attached cake carefully removed. Thiscake, which is from 3 to 5 inclics thick, is nearly pure, only requiring a little scraping,whore it was in contact with tlie doiuc, to fit it for the market. Modifications of the Process.—If, as is often the case, sulphuric acid is cheaper or moreaccessible than hydrochloric, tlie gas liquor is neutralized with sulphuric acid, and then thesulphate of ammonia thus obtained is sublimed with common salt, {chloride of sodium,) andthus converted into sal ammoniac. NIPO SO + NaCI = NirCl+NaOSO^ Mr. Croll has taken out a patent for converting crude ammonia into the chloride, bypassing the vapors evolved in the first distillation through the crude chloride of manganese,obtained, as a l)ye product in the preparation of chlorine, for the manufacture of chloride oflime : crude chloride of iron may be used in the same wav. AMMONIUM, CHLORIDE OF. 91 Mr. Laming patented in July, 1843, the substitution of a sol
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
