Where do dye intermediates come from-Tangshan Zhouhang Technology|Oxyanthraquinone|Magnesium Sulfate

Where do dye intermediates come from

Time：

2023-06-19

Dye intermediates also refer to various aromatic hydrocarbon derivatives used in the production of dyes and organic pigments, mainly from the coal chemical and petrochemical benzene, toluene, naphthalene and anthracene aromatics as the basic raw materials, through a series of organic synthesis unit processes.

The most common chemical reactions used to process raw materials into dye industry intermediates are as follows:

(1) Sulfonation reaction

(2) nitration reaction

(3) halogenation reaction

(4) Amino group was prepared by reduction reaction

(5) diazotization reaction (often accompanied by coupling reaction)

(6) The sulfonic acid group is replaced by the alkali fusion reaction into the hydroxyl group

(7) acylation reaction

(8) Oxidation reaction

(9) Condensation and carbonation reaction

(10) Aromatic reaction (mainly amino)

(11) Intersubstitution of hydroxyl and amino groups