A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . or when there is not a sufficient supplyof air, some sulphur sublimes, and is condensed in the chamber, and at last falls into thesulphuric acid at the bottom of the chamber. By this means, not only is less sulphuricacid produced, but the sulphuric acid, when drawn from the chamber, contains some sul-phur in suspension: in this case it must be allowed to stand, so as to deposit the sulphxu,which may be collected, washed, dried, and again used. If the sulphur wer
A supplement to Ures Dictionary of Arts, Manufactures, and Mines, : containing a clear exposition of their principles and practice. . or when there is not a sufficient supplyof air, some sulphur sublimes, and is condensed in the chamber, and at last falls into thesulphuric acid at the bottom of the chamber. By this means, not only is less sulphuricacid produced, but the sulphuric acid, when drawn from the chamber, contains some sul-phur in suspension: in this case it must be allowed to stand, so as to deposit the sulphxu,which may be collected, washed, dried, and again used. If the sulphur were not removedbefore concentrating, it would, at the temperature requisite for evaporation, decompose thesulphuric acid, with the escape of sulphurous acid gas, and hence much sulphuric acid would^e lost. The reaction that would take place is represented by the following equation:—2IIS0^ -f S = 3S0 + 2H0 Sulphuric acid. Sulphur. Sulphurous acid gas. TVater. 2d. If there is not a sufficient quantity of steam admitted into the chamber, the solidcompound of sulphuric acid and binoxide of nitrogen, above mentioned, would be formed. SULPHUKIO ACID. lOil on the sides of the chamber, and thus remove the oxidizing agent from action, and hencea large quantity of sulphurous acid would escape by the waste-pipe unchanged. 3d. A deficiency of nitric acid in the chamber also causes great loss; the Bulphurousacid, as in the former case, escaping unoxidized. The first of these three subjects was counteracted by M. Grovelle, who, taking advan-tage of an idea put forth by M. Clement Desormes, constructed a furnace for burning thesulphur, so as to have a double current of air. lie substituted for the sole of the furnacesome parallel bars of iron, on which were placed cast-iron pans or boxes, bound together,but leaving intervals for the entrance of air between each : these were filled with sulphur,which was then ignited, and thus a plentiful supply of air was constantly kept up. Faming, or Nordha
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Keywords: ., bookcentury1800, bookdecade1860, bookpublishernewyo, bookyear1864
