This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...but this has not given good results in practice, so that when the patent lapsed in 1898 it was not renewed. In 1905 the Electron Works of Griesheim patented a process for concentrating dilute nitric acid by mixing it with an excess of sodium polysulphate (S04)2HNa3 and then distilling it at 120 to 130. All the nitric ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...but this has not given good results in practice, so that when the patent lapsed in 1898 it was not renewed. In 1905 the Electron Works of Griesheim patented a process for concentrating dilute nitric acid by mixing it with an excess of sodium polysulphate (S04)2HNa3 and then distilling it at 120 to 130. All the nitric acid was thus obtained pure; the polysulphate loses all its water of hydration at 230 to 250, and can then be used again. The condensing plant is, however, much more important than the distilling plant, and after many changes has to-day reached a remarkable degree of perfection, so that all the gases which are evolved together with the HN03 vapours are obtained separately. These gases consist more especially of nitrogen trioxido, N203, HC1, nitrosyl chloride, chlorine, iodine (if the nitrate contains it), and probably also oxygon. The lower the temperature at which the sulphuric acid reacts with tho nitrate the less nitrogen dioxide, N02, is formed. The HC1 is formed by the action of the sulphuric acid on chlorides contained in the nitrate, and this HO, in contact with nitric acid, is in turn partly transformed into chlorine and nitrosyl-chloride, N03H + 3HC1--N0C1 + Cls + 2H20, and since HC1, CI, and NOC1 are evolved at lower temperatures, these are found in the first products of distillation. If the nitrate contains perchlorates chlorine derivatives are also formed towards the end of the distillation. All these impurities are soluble in nitric acid, Bo that on simply condensing the vapours from the distillation, which was once the general practice and still is in certain works to-day, a very impure nitric acid is obtained, which Fig. 144. must then be separately purified, whilst in modern plants pure nitric acid is obtained directly. The old ...
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Add this copy of Treatise On General and Industrial Inorganic Chemistry to cart. $28.30, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
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Add this copy of Treatise On General and Industrial Inorganic Chemistry to cart. $43.81, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Treatise On General and Industrial Inorganic Chemistry to cart. $54.69, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
