Method for preparing disperse red 60
A technology of disperse red and weight percentage, applied in the direction of amino-hydroxyanthraquinone dyes, etc., can solve the problems of inability to change environmental pollution, low yield, consumption of steam, etc., achieve obvious economic and environmental benefits, and reduce the loss of phenol , the effect of reducing the operation process
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[0021] Example 1: The 4M 3 Condensation mother liquor water was pumped into a 6300L enamel kettle, stirring was turned on, and 60kg of 98% sulfuric acid and 50kg of sodium sulfate were slowly added. After the addition, stir for half an hour, and then separate into layers. The upper layer is a solution containing phenol and disperse red 60 dissolved in phenol, and the lower layer is a potassium bromide solution. The upper layer solution is added with alkali to adjust the pH to 6-9, which is the mother liquor water after treatment. In a 5000L enamel reactor, add 700kg of the above-prepared treated mother liquor water, 300kg of phenol, 500kg of 1-amino-2-bromo-4-hydroxyanthraquinone dry product and 180kg of acid binding agent potassium carbonate, and the addition ends in 2 hours. Raise the temperature to 148-150℃, and keep the temperature for 5-6 hours. After the detection reaches the end, the temperature is reduced to 90-105℃. At this temperature, 1000kg of 3-5% light alkali water i...
Example Embodiment
[0022] Example 2: The 4M 3 The condensed mother liquor water was pumped into a 6300L enamel kettle, stirring was turned on, and 250 kg of 50% waste sulfuric acid and 90 kg of sodium chloride were slowly added. The following process steps were the same as in Example 1. In a 5000L enamel reactor, add 600kg of the above-prepared treated mother liquor water, 400kg of phenol, 500kg of 1-amino-2-bromo-4-hydroxyanthraquinone dry product, and 180kg of acid binding agent potassium carbonate. The following process steps are the same. example 1. That is, 513 kg of Disperse Red 60% off and dried, the yield is 98.6%, and the content is 99.7%. The unit consumption of phenol per ton of Disperse Red 60 is 477kg.
Example Embodiment
[0023] Example 3: The 4M 3 The condensed mother liquor water was pumped into a 6300L enamel kettle, the stirring was turned on, and 240 kg of 25% sulfuric acid and 200 kg of sodium sulfate were slowly added. The following process steps are the same as in Example 1. In a 5000L enamel reactor, add 900kg of the above-prepared treated mother liquor water, 200kg of phenol, 500kg of 1-amino-2-bromo-4-hydroxyanthraquinone dry product, and 180kg of acid binding agent potassium carbonate. The following process steps are the same. example 1. That is, 518 kg of Disperse Red 60% off and dried, the yield is 99.5%, and the content is 99.2%. The unit consumption of phenol per ton of Disperse Red 60 is 410kg.
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