METHOD FOR CONTROLLING AND OPTIMIZING INDUSTRIAL PROCESSES FOR MANUFACTURING DYES, OPTICAL BRIGHTENERS AND THEIR INTERMEDIATE PRODUCTS

摘要

A description is given of a method for controlling and optimising chemical industrial processes for manufacturing dyes, optical brighteners and their intermediate products. The method is characterised in that the manufacturing methods mentioned are controlled and optimised by differential analysis of the UV/VIS absorption spectra of at least one starting compound and at least one reaction product. …An advantage of this method is that, for all practical purposes, the actual state of a process can be continuously measured, assessed and used for feedback or feed forward control. ……