The synthetic dyestuffs : and the intermediate products from which they are derived (1905)
Cain, John Cannell, 1871-1921, Thorpe, Jocelyn Field, 1872-1940 · London : C. Griffen and Co. · leaf 203
right angles. The fuming acid is now easily ejected from the bottle by connecting the shorttube with the compressed air (or an ordinary foot-bellows) and opening the tap.The acid may be blown over with the mouth if care be taken to interpose acylinder or bottle containing lumps of caustic soda. If… … Fig. 4. An example will show how the quantities are calculated :—Required 360 grams of acid containing 25 per cent. S03; to be made froman acid containing 40 per cent. S03 and concentrated acid (96 per cent. H2S04). Let x = the weight of fuming acid to be takenand y = the weight of cone, sulphuric…
Dyes and dyeing
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