The manufacture of intermediate products for dyes (1919)
Cain, John Cannell, 1871-1921 · London : Macmillan · leaf 152
lecting the volatilised amyl alcohol are also shown. The still used is lined with lead, and is fitted with copper coils (s) through which steam is passed in order to raise the contents to boiling point. The vacuum still A (Fig. 20) has a capacity of about 150 litres and is connected with a copper… … FIG. 20. of rectified, resorcinol. The first runnings of the vacuum distilla- tion, from several operations, are collected and, on redistillation, yield a further quantity of resorcinol. Note. — The theoretical yield from 125 kilos, of sodium benzene- disulphonate, if the latter is anhydrous, is…
Dyes and dyeing
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