Artificial dye-stuffs; their nature, manufacture, and uses (1917)
Ramsey, Albert R. J, Weston, H. Claude (Hubert Claude) · London, Routledge; New York, Dutton · leaf 69
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 , … 1,000 lbs. of sulphuric acid and dissolved by agitation.When the solution is complete, 800 to 900 lbs. ofsulphuric acid containing 70 per cent, of SO3 are run ANILINE AND THE AZO DYE-STUFFS 55 in slowly, the mixture being constantly agitated andthe temperature kept below 40° C. In about six…
Dyes and dyeing
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