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Purification process of dye paste

A dye color paste and dye technology, applied in the direction of organic dyes, etc., can solve the problems of low color paste purity, inability to achieve printing effect, etc., and achieve the effect of good printing fluency and high color fastness.

Active Publication Date: 2013-12-25
TRENDVISION TECH(ZHUHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purity of the color paste in the wide-format printer ink is high, but the purity of the color paste purified by the existing purification process is low, and it cannot achieve a good printing effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of purification process of dye color paste, comprises the following steps:

[0030] 1) Dissolve sulfur yellow brown 5G sulfur dye raw powder with ultrapure water to make a dye water stock solution with a mass concentration of 20% (heat the water stock solution to 60°C), add activated carbon, activated fine clay, and diatomaceous earth to absorb and remove Oil, the amount of adsorbent so that the surface tension of the dye water stock solution is at 45-48dyn / cm;

[0031] 2) Filter the dye water stock solution obtained in the previous step with a filter bag with an absolute filtration accuracy of 1 μm and a MILLIPORE filter element to remove impurities;

[0032] 3) Cool down to 2-5°C to remove sulfate ions so that the concentration is ≤2000ppm, and then use a nanofiltration membrane with a molecular weight of 150-300 Daltons to remove chloride ions in the dye water stock solution (so that Cl - <1000ppm) and dye intermediates;

[0033] 4) Concentrate the dye water...

Embodiment 2

[0038] A kind of purification process of dye color paste, comprises the following steps:

[0039] 1) Dissolve acid red 296 dye raw powder with ultra-pure water to make a dye water stock solution with a mass concentration of 30% (heat the water stock solution to 60°C), add activated carbon to absorb and remove oil, and the amount of adsorbent is such that the dye water The surface tension of the stock solution is 45-48dyn / cm;

[0040] 2) Filter the dye water stock solution obtained in the previous step with a filter bag with an absolute filtration accuracy of 1 μm and a MILLIPORE filter element to remove impurities;

[0041] 3) Cool down to 2-5°C to remove sulfate ions so that the concentration is ≤2000ppm, and then use a nanofiltration membrane with a molecular weight of 150-300 Daltons to remove chloride ions in the dye water stock solution (so that Cl - <1000ppm) and dye intermediates;

[0042] 4) Concentrate the dye water stock solution obtained in the previous step to a ...

Embodiment 3

[0047] A kind of purification process of dye color paste, comprises the following steps:

[0048] 1) Dissolve sulfur yellow brown 5G sulfur dye raw powder with ultrapure water to make a dye water stock solution with a mass concentration of 25% (heat the water stock solution to 80°C), add activated fine clay and diatomaceous earth to absorb and remove oil, and absorb The dosage of the agent is to make the surface tension of the dye water stock solution at 45-48dyn / cm;

[0049] 2) Use a filter bag with an absolute filtration accuracy of 1 μm and MILLIPORE to remove impurities from the dye water stock solution obtained in the previous step;

[0050] 3) Cool down to 2-5°C to remove sulfate ions so that the concentration is ≤2000ppm, and then use a nanofiltration membrane with a molecular weight of 150-300 Daltons to remove chloride ions in the dye water stock solution (so that Cl - <1000ppm) and dye intermediates;

[0051] 4) Concentrate the dye water stock solution obtained in ...

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Abstract

The invention discloses a purification process of dye paste. The process comprises the following steps of: 1) preparing a dye aqueous stock solution with mass concentration of between 20 and 30 percent from a dye raw powder, adding an adsorbent to adsorb and remove oil; 2) filtering the dye aqueous stock solution prepared in the last step with a filter bag and a filter element to remove impurities; 3) cooling the aqueous stock solution prepared in the last step to remove sulfate radical ions to realize that the concentration of the solution is less than or equal to 2,000ppm, and removing chloride ions and dye intermediates in the dye aqueous stock solution with a nano-filtration membrane with a molecular weight of between 150 and 300 Daltons; 4) concentrating the dye aqueous stock solution prepared in the last step to be of a mass concentration of between 40 and 60 percent; 5) adjusting the pH of the dye aqueous stock solution prepared in the last step to be between 7.5 and 8.5; 6) adding 2 to 4 percent of cosolvent, 1 to 3 percent of preservative, and 1 to 3 percent of antifoaming agent based on the mass of the dye aqueous stock solution prepared in the step 5); and 7) filtering with the filter element. The paste of the invention has the advantages of good printing smooth property, nozzle plugging prevention and higher color fastness.

Description

technical field [0001] The invention relates to a purification process of dye paste. Background technique [0002] At present, with the continuous growth of the global inkjet ink industry, large international companies have used various methods such as joint ventures, cooperation, and acquisitions to expand internationally. Many international companies have declined in their own domestic markets, and have received good results in China and the Asia-Pacific. develop. According to statistics, in 2003 alone, there were more than a dozen companies with annual global ink sales exceeding US$500 million, and since 2003, the sales of inkjet ink companies have been growing by 20-30% every year. [0003] The continuous growth of inkjet ink volume has brought good business opportunities to inkjet dye paste production (dye purification plant). The purity of the color paste in the wide-format printer ink is high, but the purity of the color paste purified by the existing purification p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/54C09B67/10
Inventor 郭炎坚
Owner TRENDVISION TECH(ZHUHAI) CO LTD
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