What are dye intermediates?
Time：
2021-02-23
Dye intermediates, also known as intermediates, generally refer to various aromatic derivatives used in the production of dyes and organic pigments. They are made from benzene, toluene, naphthalene and anthracene aromatics from coal chemical industry and petroleum chemical industry through a series of organic synthesis unit processes.
Dye intermediates, also known as intermediates, generally refer to various aromatic derivatives used in the production of dyes and organic pigments. They are made from benzene, toluene, naphthalene and anthracene aromatics from coal chemical industry and petroleum chemical industry through a series of organic synthesis unit processes. With the development of the chemical industry, the application range of dye intermediates has been extended to the pharmaceutical industry, pesticide industry, explosive industry, information recording materials industry, as well as additives, surfactants, fragrances, plastics, synthetic fibers and other production sectors. There are many varieties of dye intermediates, and there are hundreds of more important ones. The most important early dye intermediates, such as nitrobenzene, aniline, phenol, chlorobenzene and phthalic anhydride, have developed into important basic organic intermediates due to a wide range of uses and large amounts, and the world's annual output is more than one million tons. The most important dye intermediates are o-nitrochlorobenzene, p-nitrochlorobenzene, o-nitrotoluene, p-nitrotoluene, 2-naphthol, anthraquinone, 1-amino-anthraquinone and so on. Starting from the intermediates mentioned above, through a series of organic synthesis unit processes, various intermediates with complex structures can be prepared.
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