Production method of disperse dye blue B56#

Abstract

The invention discloses a production method of disperse dye blue B56#, and belongs to the technical field of chemical dye. The method comprises the following steps: treating 1-aminoanthraquinone DMF residues with sodium sulfite to purify and produce mixed nitrate, and sequentially carrying out primary nitrification, primary nitrification refining, condensation, secondary nitrification, hydrolysis,reduction and bromination transformation on the mixed nitrate to finally obtain the product disperse blue B56#; and retreating the hydrolysis recovery mother liquor to recover a byproduct that is 2,4-dinitrophenol. According to the invention, 2,4-dinitrophenol sodium salt is produced in a filter cake hydrolysis process of product disperse blue B56#l; the 2,4-dinitrophenol sodium salt is dissolvedin the hydrolysis recovery mother liquor in order to effectively utilize effective components in the hydrolysis recovery mother liquor and reduce the emission of three wastes, the byproduct 2,4-dinitrophenol is produced through acidification and filtration, and the byproduct detection meets the standard, so that the byproduct can be used as an enterprise raw material for producing coating intermediates.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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AI Technical Summary

Benefits of technology

This new method uses special chemicals called benfblue bile acids that break down certain compounds found naturally or artificialally into smaller molecules like pigments. These small particles are then separated from other substances during processing steps such as drying processes. By doing this, they become useful products made up mostly of these tiny parts without being thrown away after use.

Problems solved by technology

This patented technical problem addressed in this patents relates to producing high purity dyestuffs with minimal harmful chemical substances during manufacturing processes such as one described earlier. Existing methods involve sending excessive amounts of material away from the main facility or burning them off at an expensive cost. Additionally, some techniques have been developed but are still being researched due to their negative impact on human health caused by these solvents.

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