Artificial dye-stuffs; their nature, manufacture, and uses (1917)
Ramsey, Albert R. J, Weston, H. Claude (Hubert Claude) · London, Routledge; New York, Dutton · leaf 68
rs,the hydrogen sulphide evolved being conducted to aniron box, where any /)-toluidine carried over with itcollects, and is then burnt to assist the heating of themelt-pot. \V]\en the evolution of sulphuretted hydrogen ceasesthe agitator is stopped and a discharge pipe is insertedin the charge hole… … COLLECTOR ♦ Fig. 9, 54 ANILINE AND THE AZO DYE-STUFFS ground to powder form, and 400 lbs. of it are placed ina sulphonation pan provided with cooling coils and anagitator, as shown in Fig. 10, where it is mixed with WATIH INLET t \vjjaex 01/ru.T ,
Dyes and dyeing
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