The Chemistry of Gas Manufacture; A Practical Manual for the Use of Gas Engineers, Gas Managers, and Students (Paperback)

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. 1907 Excerpt: ... in this process be no loss of the manganese constituents of the Weldon mud. It is worked through a cycle, viz., manufactured, next employed in the removal of sulphur, and when sufficiently saturated, submitted to regeneration. During this latter process it parts with all its sulphur, and as a result of the regeneration it is restored to its original condition, and is ready for further use by the gas engineer. Its regeneration being economical, the authors assert that it will be found, when worked under the best conditions, to compare favourably in price with other gaspurifying materials. The Weldon mud was found to be a sharp and powerful absorbent of sulphuretted hydrogen, and that the sulphide of manganese resulting from such absorption could be revivified in situ by the admission of a regulated sufficiency of air. WELDON MUD. 171 It was found that Wcldon mud required about 1.0 per cent, of atmospheric air for revivification in situ, and that when this quantity was admitted it remained active for some considerable period. If the Weldon mud be in a position where condensation is a matter of certainty, it will, by virtue of its physical structure, absorb the water thus condensed, and when saturated may have to be taken out in a wet and sloppy condition. If the mud thus removed be spread in thin layers, and freely exposed to the action of the air it will dry, and can be broken, &c, and will then be active for further sulphuretted hydrogen absorption. The analysis of a sample of Weldon mud works out as follows: --Water 40.60 per cent. Manganese dioxide---29.80 Calcium carbonate--10.60, Calcium chloride-3.01 Calcium sulphate-2.64 Calcium hydrate 3.01, Loss on ignition 9.80, Fe2C3, MnCl. &c. 0.54 Great care must...