Preparation technique for diazo liquid of benzidine yellow G
A benzidine yellow and preparation technology, applied in the direction of disazo dyes, etc., can solve problems such as nitric oxide and nitrogen dioxide, unsatisfactory control parameter settings, and human hazards
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Embodiment 1
[0017] (1) Dichloride beating: add 750KG of water to the diazo tank, then add 125KG of hydrochloric acid, the concentration of the hydrochloric acid is 30%, put 80KG of dichloride into the diazo tank, the dichloride is 3-3- Dichlorobenzidine hydrochloride, turn on the stirring button of the stirrer, stir and beating, the beating time is 2 hours, add ice cubes under the situation of stirring, and the ice cubes are broken ice cubes. Cool the feed liquid in the diazo tank to 0°C;
[0018] (2) Diazotization: Quickly add 39KG of sodium nitrite solution into the diazo tank within 2 minutes, the concentration of sodium nitrite is 40%, keep the temperature of the material liquid at 5°C while stirring, and keep the reaction The time is 40min,
[0019] Put in 1.5KG of activated carbon, stir for 10 minutes below 5°C, add water to make the total volume in the diazo tank reach 1050L, add 0.5KG of 9-fold diluted Taikoo oil, stir for 1 minute, and then stand still;
[0020] (3) Suction fil...
Embodiment 2
[0022] (1) Dichloride beating: add 700KG of water to the diazo tank, then add 110KG of hydrochloric acid, the concentration of the hydrochloric acid is 30%, put 70KG of dichloride into the diazo tank, the dichloride is 3-3- Dichlorobenzidine hydrochloride, turn on the stirring button of the stirrer, stir and beating, the beating time is 1 hour, add ice cubes under the situation of stirring, the ice cubes are ice cubes that have been broken. Cool the feed liquid in the diazo tank to 0°C;
[0023] (2) Diazotization: quickly add 38.4KG sodium nitrite solution into the diazo tank within 1min, the concentration of sodium nitrite is 40%, keep the temperature of the material liquid at 5°C while stirring, and keep the reaction The time is 80min,
[0024] Put in 1.4KG of activated carbon, stir at 5°C for 7 minutes, add water to make the total volume in the diazo tank reach 1120L, add 0.5KG of Taikoo oil diluted 10 times, stir for at least 1 minute, and then stand still;
[0025] (3) ...
Embodiment 3
[0027] (1) Dichloride beating: add 700KG of water to the diazo tank, then add 105KG of hydrochloric acid, the concentration of hydrochloric acid is 32%, put 70KG of dichloride into the diazo tank, the dichloride is 3-3-dichlorobis Aniline hydrochloride, turn on the stirring button of the stirrer, stir and beating, the beating time is 1.5 hours, add ice cubes under the situation of stirring, the ice cubes are broken ice cubes. Cool the feed liquid in the diazo tank to -3°C;
[0028] (2) Diazotization: quickly add 38.4KG of sodium nitrite solution into the diazonium tank within 0.5min, the concentration of sodium nitrite is 38%, keep the temperature of the material liquid at 3°C while stirring, and keep the reaction The time is 40min,
[0029] Put in 1.2KG of activated carbon, stir at below 5°C for 5 minutes, add water to make the total volume in the diazo bucket reach 1090L, add 0.6KG of Taikoo oil diluted 11 times, stir for 5 minutes, and then stand still;
[0030] (3) Suc...
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