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vat green

Profile:Manufacturer - Producer|Ref:PSL87540YH | Country: China | Currency: | Export: No

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country : China

For cotton fiber and polyester / cotton blended fabric dyeing
Khaki 2G reduction for cotton, silk dyeing, dyeing and affinity are good, is the main dye dyed green grass. Also used for sticky cotton, polyester cotton blended fabric dyeing.

Production methods
To 1,4,5,8 - tetrachlorodibenzo anthraquinone and 1 - amino-anthraquinone as the raw material, the two first condensation in the presence of copper powder, and aluminum chloride in the presence of closed-loop, the product obtained by oxidation. After washing, filtering, drying, grinding finished. .
In the drum reactor to add 60kg tetrachloro anthraquinone, 150kg 1 - amino-anthraquinone, 60kg of sodium carbonate (98%), 3.5kg copper (industrial), slow heating, the temperature to within 3-4h 220-230 ℃, heat 2h. Stop heating, cooling, the material crushed 5h.
Water within the reactor 2000L, adding the material, after 1h at 95-100 ℃ boiled filtered, washed and dried.
The condensation of materials will be 50kg, 125kg aluminum chloride (98%), 25kg salt powder (industrial) mix 30min, then placed in closed pot, slowly heating up to 80-90 ℃, stop stirring, allowed to foam, self- temperature to 130-140 ℃, slow stirring, the temperature rose to 170-180 ℃, maintained after 30min, placed has been added to 1200L of water diluted the pot, boiled at 100 ℃ for 30min, filtered, washed.
Oxidation of water in the pot add 1000L, 275kg sulfuric acid (98%) and two groups of closed-loop material (water beating about 600-800L), and then adding sodium dichromate 180L (50%, dry quality about 90kg), heating to 100 -102 ℃, heat 3h. With potassium iodide test paper at any time, if the oxidant lack of additional time may be sodium dichromate, 20-30L. After reaction at 80 ℃ pressure filtration, washed with water to neutral, by grinding and drying was finished.
CAS:128-58-5(vat green 1)
Molecular formula: C36H20O4

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