Procedure for isolating azoic colorants; solubles in water, which contains sulphonic acid radicals. (Machine-translation by Google Translate, not legally binding)

摘要

"Process for isolating azo dyes, soluble in water, containing synphonic acid radicals", characterized in that the solutions or suspensions of the aqueous dyes, which are obtained in the manufacture of water-soluble azo dyes, containing synphonic acid radicals, they are subjected without previous isolation of the dyes directly to a spray drying, being of this excluded the isolation of the dye CI Acid Black 94, CI Acid Black 69 and Black Diamond PV and P2B. (Machine-translation by Google Translate, not legally binding)