Automatic continuous liquid azo dye production process and synthesis system
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An azo dye and production process technology, applied in azo dyes, monoazo dyes, organic dyes, etc., can solve the problems of difficult control, complex reactor structure, complex process, etc., and achieve good mass transfer effect.
Pending Publication Date: 2020-02-28
ZHEJIANG UNIV OF TECH
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[0049] The structure of the product Disperse Violet 93:1:
[0050] Nitrite solution: a commercially available nitrosyl sulfuric acid solution of 30% by weight;
[0051] Diazo component: commercially available 2,4-dinitro-6-chloroaniline solid, content 98%;
[0052] Coupling component solution: a 10% by weight aqueous solution of N,N-diethyl-3-acetamidoaniline, adjusted to pH 2-3 with 30% saline.
[0053] Dispersant solution: 30% aqueous solution of commercially available dispersant MF.
[0054] After checking whether the entire continuous production system and the automatic control system are normal, add 100 kg of 2,4-dinitro-6-chloroaniline into the diazotization reactor 14 . Turn on the diazotization circulation pump 16, turn on the refrigerant feed to the heat exchanger 13 of the first circulation temperature control device 9, and control the tempera...
[0058] The structure of the product Disperse Violet 107:
[0059] Nitrite solution: a 30% aqueous solution of sodium nitrite by weight;
[0060] Diazo component solution: 20% by weight of 5-amino-6-bromo-2-methylindole-1,3-dione hydrochloric acid solution (ie: 50 kilograms of 5-amino-6-bromo-2- Methylindole-1,3-dione is dissolved in 200 kilograms of 30% hydrochloric acid solution);
[0061] Coupling component solution: an aqueous solution of 10% by weight of N,N-diethyl-3-acetamidoaniline, adjusted to pH 2-3 with 30% brine;
[0062] Dispersant solution: 30% aqueous solution of commercially available dispersant MF.
[0063] After checking whether the entire continuous production system and the automatic control system are normal, add 520 kg of diazo component solution into the diazotization reactor 14, turn on the diazotization circulation p...
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Abstract
The invention discloses an automatic continuous liquid azo dye production process and a synthesis system, and belongs to the field of azo dye synthesis. The automatic continuous liquid azo dye production process comprises the following steps: adding a diazonium component, starting a first circulating temperature control device, adding a nitrite, circulating materials by using the first circulatingtemperature control device, and controlling the temperature; continuously adding the diazonium component and the nitrite; opening a diazonium discharge valve, and enabling a diazonium reaction liquidto flow out; starting a first feeding pump and a second feeding pump, and meanwhile starting a second circulation temperature control device and a third circulation temperature control device; continuously spraying a mixed solution of the diazonium reaction solution and a dispersing agent out from a first spray head, continuously spraying a mixed solution of a coupling component and a dispersingagent out from a second spray head, wherein the first spray head and the second spray head are designed for opposite spraying; adopting the second circulating temperature control device and the thirdcirculating temperature control device for circulating materials in a coupling reaction device and controlling the coupling reaction temperature; and opening a coupling discharging valve to obtain a liquid dye. The automatic continuous liquid azo dye production process and the synthesis method can be used for continuously producing azo dyes.
Description
technical field [0001] The invention belongs to the field of azo dye synthesis, and in particular relates to an automatic continuous liquid azo dye production process and a synthesis system thereof. Background technique [0002] In the molecular structure of azo dyes, more than one azo structure is usually connected with an aryl group. [0003] Most commercialized dyes are powder dyes, and a large amount of additives need to be added in the last process of dye preparation, and then dried by high-temperature gas in a spray drying tower (abbreviation: spray tower). Therefore, there is a large amount of spray tower exhaust gas in this process, and the main components are residual methylnaphthalene, naphthalene derivatives and other organic pollutants in the dispersant. Due to the large air volume of the exhaust gas of the spray tower, the air volume of a single spray tower with a diameter of 8 meters generally exceeds 100,000 m 3 / h, and the humidity of the exhaust gas is hig...
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