A rapid analysis method for the synthesis process of azo dyes

Abstract

A rapid analysis method for the synthesis process of azo dyes, relating to a rapid analysis method for dyes, including step S1, analysis and detection of the diazotization process of azo dye synthesis and step S2, analysis and detection of the coupling process of azo dye synthesis; step S1 Firstly, the analysis model of para-ester diazonium salt is established, and a series of para-ester diazonium liquid samples to be tested are prepared in real time, and the spectral data is collected immediately with a spectrometer to measure the para-ester diazotization reaction process under different reaction times. The content of ester diazonium salt; Step S2 is to first establish the coupling process reaction product analysis model, prepare a series of coupling reaction solution samples to be measured in real time, and immediately collect spectral data with a spectrometer, and measure the azo dye under different reaction times of the coupling reaction process content to achieve process control. The invention is suitable for real-time control of the dye synthesis process, has simple operation, short inspection cycle, high accuracy and low inspection cost, and has important significance in the quality monitoring of dye products.

Description

technical field [0001] The invention relates to a rapid analysis method for dyes, in particular to a rapid analysis method for the synthesis process of azo dyes. Background technique [0002] Azo dyes are the most widely used synthetic dyes in the printing and dyeing process of textiles and clothing. They are used for dyeing and printing of various natural and synthetic fibers, and are also used for coloring of paints, plastics, rubber, etc. Azo is one of the mandatory inspection items required by international environmental protection, and the standard stipulates that the products under inspection must not contain banned azo dye intermediates. The dye analysis methods currently used for testing include high performance liquid chromatography, thin layer chromatography, conventional spectrophotometry, and chemical titration analysis. Among them, chromatography has high accuracy, but has the disadvantages of complicated operation, long inspection cycle, and high inspection co...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a rapid analysis method for the synthesis process of azo dyes, so as to solve the complex operation, long inspection cycle, high inspection cost, low accuracy, and unsuitability for the dye synthesis process in the prior art. Disadvantages of real-time control

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