METHOD FOR CONTINUOUSLY PREPARING WATER-SOLUBLE AZO DYE BY COUPLING A NEBULIZER WITH A PIPELINE

摘要

Disclosed is a method for continuously preparing a water-soluble azo dye by coupling a nebulizer with a pipeline. According to the method, the nebulizer is coupled with a pipeline with an interception tower plate, atomized and mixed reaction liquid flow flows through the pipeline with the interception tower plate, and mixing and reacting are further enhanced through turbulent mixing on the tower plate, so that instant separation of reaction heat generated in an atomizing contact reaction from a reactant is achieved, and normal-temperature rapid continuous production of the water-soluble azo dye is achieved. Fog drops which are atomized by using the nebulizer have small particle diameter and large specific surface area, so that a diazo salt and a coupling component are sprayed separately, move face to face and can be fully contacted, and mixing and reacting speeds are increased. The preparation method is simple, and compared with preparation of a dye of the same kind with a batch reactor, in the reparation process of the water-soluble azo dye, a cold source is not required to be added additionally for cooling, thereby reducing energy consumption and improving production quality and efficiency.

主权项

1. A method for continuously preparing water-soluble azo dye by coupling a nebulizer with pipeline, wherein the coupling reaction is proceeded in a nebulizer-pipeline coupling continuous reactor, consists of the following steps:
(a) the diazo salt solution forms nebulized droplets by nebulizing unit; (b) the coupling component solution forms nebulized droplets by another nebulizing unit; (c) the diazo salt and the coupling component move face to face and fully contacted, and liquid stream is formed; (d) the liquid stream flows in the pipeline which has a interception column plate, the coupling of two components fully accomplish on the column plate, and preparing water-soluble azo dye solution.