The invention provides a
continuous production method and
system of a heterogeneous
system azo
disperse dye, and the method comprises the following steps:
grinding and pulping a
coupling intermediateinsoluble in water or an acid
aqueous solution, a dispersing agent, and the water or the acid
aqueous solution to obtain a
coupling pulping solution, continuously pumping the
coupling pulping solutionand a diazonium
salt solution into a
supergravity machine for
coupling reaction, enabling a reaction material to flow into a receiving kettle, forming a circulating
system by the receiving kettle, aheat exchanger and the
supergravity machine, controlling the liquid level or weight of the receiving kettle, continuously extracting the reaction material into a
crystal transformation kettle, and carrying out heating
crystal transformation, filter pressing and washing to obtain the azo
disperse dye. According to the method, through combination of intermediate
grinding, dispersant adding and
supergravity machine enhanced reaction,
sulfuric acid or
hydrochloric acid needing to be added during pulping in a traditional process is reduced or even eliminated, the
wastewater amount can be effectively reduced, the reaction efficiency is improved, and the method has obvious advantages in the aspects of reaction
retention time, product purity and yield.