Method for producing acid dye product
A production method and technology for acid dyes, applied in the field of production, can solve the problems of high comprehensive cost, complex process steps, difficult to handle, etc., and achieve the effects of simplifying production process, reducing dye dust pollution, and reducing energy and production costs
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Embodiment 1
[0033] Add 10000Kg of water, 940Kg of ammonium bicarbonate, and 2650Kg of nitrate into the reaction kettle, stir for 10 minutes after the addition, and control the pH=1.5-2.0.
[0034] In another reactor, add 2500Kg water, 1250Kg 30% liquid caustic soda, 1300Kg ethyl naphthol, heat up to 50°C, and stir to completely dissolve. Add it into the nitrate solution, raise the temperature to 50°C, stir and react at this temperature for 2 hours, and measure the end point of the coupling reaction. After the end point of the coupling is reached, add 500Kg of glacial acetic acid, then add 1040Kg of 22% chromium powder, stir and control the pH to 5.5-6.5, and raise the temperature. When the temperature rises to 98-102°C, it reaches the end of chromization.
[0035] Put in perlite, keep warm and stir for half an hour to filter out insoluble matter, add appropriate amount of sodium dihydrogen phosphate, disodium hydrogen phosphate and filler to the filtrate, control the concentration of the...
Embodiment 2
[0038] Chromating agent uses 700Kg chromium sulfate instead, and other conditions are identical with embodiment 1, finally obtains about 8400Kg of standard product.
Embodiment 3
[0040] Add 900kg of water, 300kg of 30% liquid caustic soda in the reactor, drop into 350kg of ethyl naphthol, stir until fully dissolved and set aside.
[0041] Add 400kg of water to another reactor, put in 600kg of crushed ice, start stirring, the temperature is about 15°C, put in 550kg of oxygen body, put in 50kg of 836B, put in 200kg of ammonium bicarbonate, and start the coupling. Press a batch of ethyl naphthol solution into the above-mentioned oxygen body dissolving kettle at a uniform speed, stir for 1 hour, raise the temperature to 60-65°C, and keep the temperature for 2 hours to measure the coupling end point.
[0042] After the coupling end point is reached, add 200kg of ammonium bicarbonate and 750kg of chromium acetate solution, raise the temperature to 100°C and keep it warm. After the chromization end point is reached, the reaction liquid is cooled to 75°C, and about 600kg of liquid caustic soda is added, and the feed liquid is evenly divided into two 5000L pots ...
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