ANTHRAQUINONE DYESTUFF MANUFACTURE

摘要

Anthraquinone dyes are prepared in substantially quantitative yields by reacting a diaminodihydroxyanthraquinone, such as 4,5-diaminochrysazin, with a benzenesulfonyl chloride in a thin fluid melt consisting essentially of anhydrous aluminum halide in admixture with a compound that gives a fluid melt at low temperatures. New dyes having improved substantivity on polyester fibers are made by an alternate embodiment involving the concurrent addition of a halogen such as bromine to the anhydrous aluminum halide melt.