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Preparation and application of high strength acid 172 black liquid dye

A liquid dye, high-strength technology, applied in the direction of complex metal compounds, applications, azo dyes, etc. of azo dyes, can solve the problem of increasing waste water, can not effectively improve the water solubility, filtration performance and storage performance of acid 172 dyes, can not meet the High-speed one-pass printing and other issues to achieve high-strength effects

Active Publication Date: 2021-06-08
BINHAI IND TECH RES INST OF ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both chloride salt and 2-naphthol can be removed relatively thoroughly by nanofiltration membrane (molecular weight cut-off 500-1000), but this method cannot effectively remove sulfate (residue of sulfate in the original powder can reach tens of thousands of ppm, and the removal The efficiency is usually less than 70%), and the desalination efficiency is low, and the generation of waste water is greatly increased, which cannot effectively improve the water solubility, filtration performance and storage performance of the acid 172 dye after desalination, resulting in the production of high-concentration ink (dye 10 -12%) has relatively big problems in printing fluency, which cannot meet the needs of high-speed one-pass printing
Although there is a patent US20160230334A1 that can obtain high-concentration acid 172 black ink with good stability by adding 2-pyrrolidone as a co-solvent, but 2-pyrrolidone is corrosive to some industrial nozzles and is not a general solution, and Extensive use of 2-pyrrolidone also increases VOC emissions
U.S. Patent US7211129 uses thiodiglycol with a lower boiling point of 40% ink content as a co-solvent, and there is also the problem of higher VOC content in the ink

Method used

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  • Preparation and application of high strength acid 172 black liquid dye
  • Preparation and application of high strength acid 172 black liquid dye
  • Preparation and application of high strength acid 172 black liquid dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Refining of 6-nitro-1-diazo-2-hydroxy-4-naphthalenesulfonic acid (also known as 6-nitrite):

[0063] In 3000 liters of PP material #1 reactor, 500Kg6-nitrox was added to 1000 liters of demineralized water, stirred and beaten at 180-200rpm, the temperature was controlled at 20°C and 120 liters of 30% NaOH solution was added to adjust the pH=1.03. After complete dissolution, filter with a cloth bag filter, collect the filtrate and transfer to #2 reaction kettle.

[0064] Add 230 kilograms of sodium chloride to #2 reactor within 1 hour, leave standstill after stirring. After the solid is no longer precipitated, filter with a plate and frame filter press to obtain a filter cake. Put this filter cake into #1 reactor, beat with 1000 liters of soft water, control the stirring speed 180-200rpm, control the temperature not to exceed 20°C all the time, then add 120Kg of 30% hydrochloric acid until the material is completely dissolved.

[0065] Add 180Kg sodium chloride to #1 re...

Embodiment 2

[0067] The refining of nitrox is different from Example 1 in that 125 liters of 30% NaOH solution is added in the initial stage to adjust the pH to 2. Other steps are the same as those in Implementation 1, and then the refined 6-nitrox wet filter is obtained. Cake 664Kg, converted to dry 288Kg, converted yield is 61.8%. The data before and after purification of the 6-nitrite measured by HPLC and ion chromatography are shown in Table 1 below.

Embodiment 3

[0069] The refining of 6-nitrite refining is different from Example 1 in that 125 liters of 30% NaOH solution is added at the initial stage to adjust the pH to 2, and the amount of sodium chloride added to the refining of the first step is increased to 265 kilograms, Other steps are all identical with implementation 1, then obtain refined 6-nitroxygen wet filter cake 737Kg, dry 345Kg, conversion yield is 69.0%. The data before and after purification of the 6-nitrite measured by HPLC and ion chromatography are shown in Table 1 below.

[0070] Table 1 Comparison table of data before and after refining 6-nitrox

[0071]

[0072] As can be clearly seen from the data in Table 1, when the pH was 1.03, the yield was higher, and the quality of sodium chloride added when the first step was refined was relatively less (embodiment 1); when the pH was raised to 2 , if add the sodium chloride of same quality, then productive rate has reduced nearly 10% (embodiment 2); If want to obtain...

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Abstract

The invention provides the preparation and application of high-strength acid 172 black liquid dye, including the preparation of high-strength acid 172 black liquid dye with excellent indicators from the whole process of raw material refining, synthesis optimization and post-treatment, and hereby Based on formula adjustment, an acidic black textile ink with low VOC content, high dye concentration, good printing fluency, stable storage and low corrosion to nozzles is formulated, which is suitable for printing on polyamide fabrics.

Description

technical field [0001] The invention belongs to the field of metal complex dyes, and in particular relates to the preparation and application of high-strength acid 172 black liquid dye. Background technique [0002] Acid dyes are widely used in dyeing and direct printing of wool, nylon, silk and their blended fabrics. With the popularization of digital printing technology, this type of dye is also widely used in the production of digital printing ink, and the applicable fabrics include wool, nylon, nylon and silk. In order to adapt to the development trend of faster and faster printing of digital printing equipment, in addition to requiring excellent filtration and storage performance, wide color gamut, and low content of harmful impurities in digital printing inks, the concentration of inks is also getting higher and higher. Acidic textile inks range from 5- The concentration of 6% has gradually increased to 8-10%, and there is a trend of further improvement. In order to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B45/34C09B45/01C09B67/24D06P1/39D06P3/24D06P5/30
CPCC09B45/01C09B45/34C09B67/0079C09D11/328D06P1/39D06P3/241D06P5/30
Inventor 吴先国张玉卿张杰曹莹莹杨慧霞韩君竹盛楠朱烨林
Owner BINHAI IND TECH RES INST OF ZHEJIANG UNIV
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