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Automatic azo dye production process

A production process and technology of azo dyes, applied in the direction of azo dyes, monoazo dyes, organic dyes, etc., can solve the problems of high production cost and low product purity, and achieve the effect of low production cost

Active Publication Date: 2019-05-17
杭州映山花颜料化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic production process for azo dyes, which solves the problems of low purity of the product produced by the existing production process, the need for auxiliary agents such as hyperdispersants, and high production costs.

Method used

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 , figure 2 As shown, a kind of azo dye automatic production process provided by the invention comprises:

[0028] 1) Add 43kg of 1500LL ammonia water with a mass percentage of 20% to the diazo kettle, then raise the temperature to 30°C, pour 110kg of 2B acid, stir to make it transparent, then add ice to cool down to below 0°C, add 30% hydrochloric acid 150kg, after stirring for 15 minutes, add ice and water to cool down to below 0°C, adjust the volume to 3000L, add 30% sodium nitrite aqueous solution within 20 minutes; stir and react for 30 minutes, add CaCl 2 220kg aqueous solution, and then stirred for 20min, the storage temperature is below 0°C, and the total volume at this time is 3300L; the CaCl 2 120kg CaCl dissolved in aqueous solution 2 .

[0029] 2) Put 1500-1700L of water in the dissolution kettle, add 190kg of 30% sodium hydroxide aqueous solution; heat up to 60°C, pour 3-hydroxy-2-naphthoic acid, stir to dissolve, add water to adjust th...

Embodiment 2

[0040] An automatic production process for azo dyes provided by the present invention includes: 1) Add 45kg of 1700L ammonia water with a mass percentage of 20% to the diazo kettle, then raise the temperature to 30°C, pour 130kg of 2B acid, and stir to dissolve it to Transparent, then add ice and cool down to below 0°C, add 170kg of 30% hydrochloric acid, stir for 15 minutes, add ice and water to cool down to below 0°C, adjust the volume to 3000L, add 30% sodium nitrite within 20 minutes Aqueous solution; stir and react for 30min, add CaCl 2 240kg of aqueous solution, and then stirred for 20min, the storage temperature is below 0°C, and the total volume at this time is 3500L; the CaCl 2 120kg CaCl dissolved in aqueous solution 2 .

[0041] 2) Put 700L of water in the dissolution kettle, add 210kg of 30% sodium hydroxide aqueous solution; heat up to 60°C, pour 3-hydroxy-2-naphthoic acid, stir to dissolve, add water to adjust the volume to 2500L;

[0042] 3) Add 120L of water...

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Abstract

The invention provides an automatic azo dye production process. The automatic azo dye production process comprises the steps that (1) ammonia water is added to a diazo kettle, 2B acid is poured in, then the temperature is cooled down to below 0 DEG C by adding ice, 30% of hydrochloric acid is added, and an aqueous solution of sodium nitrite with a mass percent of 30% is added; an aqueous solutionof CaCl2 is added; (2) water is added in a dissolution vessel, and 30% of an aqueous solution of sodium hydroxide is added; and 3-hydroxy-2-naphthoic acid is poured in; (3) water is added to a rosin kettle, 30% of an aqueous solution of sodium hydroxide is added, and rosin is added; and (4) a 2B acid diazo solution after diazo is added to a coupling kettle to carry out the reaction. The product prepared by the automatic azo dye production process is higher in purity and does not require additives such as a super dispersant, and the production cost is lower.

Description

technical field [0001] The invention relates to the field of dye production, in particular to an automatic production process for azo dyes. Background technique [0002] In the prior art, Patent Document 1: CN201610750755.2 discloses a preparation method of a yellow pigment, comprising the following steps: 1, putting water, hydrochloric acid, 3,3- Dichlorobenzidine hydrochloride, solid sodium nitrite for diazotization reaction; 2, add water, liquid caustic soda, N-acetyl acetanilide in the dissolution tank to carry out coupling component compounding; 3, in the auxiliary material tank Add 300 parts of water, raise the temperature to 70°C, add 25kg of quaternary ammonium salt, and make it clear and transparent; 4, add water and sodium hydroxide to the rosin bucket and boil, then add disproportionated rosin, and add hyperdispersant; 5, add water to the coupling bucket , sodium acetate, add dilute hydrochloric acid to adjust the pH to 6.0-6.5, diazo coupling at 40-45 ° C, add t...

Claims

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Application Information

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IPC IPC(8): C09B29/15C09B29/03B01J4/00
Inventor 沈军伟
Owner 杭州映山花颜料化工有限公司
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