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Preparation method for high purity reactive black used for digital ink-jet printing

A digital inkjet, reactive black technology, applied in the direction of organic dyes, etc., to reduce the cost of enterprises, the method is simple, and it is convenient for industrial production and popularization and application.

Inactive Publication Date: 2012-06-06
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Using charged mosaic membrane separation technology to study the purification technology and process of reactive black, and the use of high-purity dyes in digital inkjet printing of textiles has rarely been reported in the literature

Method used

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  • Preparation method for high purity reactive black used for digital ink-jet printing
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  • Preparation method for high purity reactive black used for digital ink-jet printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Raw material analysis

[0040] The raw materials used in this experiment were provided by a domestic dyestuff manufacturer. After analysis, the dye content in the raw material was 84.5% (mass percentage, the same below), the NaCl content was 11.3%, and the NaSO 4 The content is 1.4%, and the organic impurity content is 2.8%. The infrared spectrum of the dye is shown in figure 2 .

[0041] (2) Separation process

[0042] First prepare a dye aqueous solution containing 6% (mass percentage) of raw materials, and remove particulate impurities through a 0.45um microfiltration membrane. Microfiltration membrane area is 1m 2 , 240 kg of feed solution was obtained in 2.5 hours under the condition of 0.2 MPa.

[0043] Take 240kg of the pretreated dye aqueous solution, and use a charged mosaic membrane to carry out constant-volume membrane filtration. The operating conditions selected for the experiment are pressure of 0.8 Pa; fluid flow of 80-120 L / min. The membrane ...

Embodiment 2

[0053] Research on main influencing factors in the purification process of reactive black in embodiment 2

[0054] The effects of operating pressure, feed liquid flow rate and feed liquid initial concentration on the purification process of reactive black were investigated experimentally.

[0055] ①Influence of operating pressure

[0056] As the operating pressure increases, the permeate flux of the membrane increases almost linearly with the pressure. Although the content of inorganic salts in the permeate decreases, the total amount of inorganic salts in the permeate increases per unit time. The results show that the increase of operating pressure is beneficial to the permeation of inorganic salts, which can reduce the operating time; on the other hand, the dye content in the permeate liquid also increases with the increase of pressure, indicating that the dye loss rate increases accordingly. The experimental conclusion shows that there is a more economical operating pr...

Embodiment 3

[0060] The raw materials used in Example 3 are imported low-salt dyes provided by a certain company. After analysis, the dye content in the raw materials is 87.7% (mass percentage, the same below), the NaCl content is 3.9%, and the NaSO 4 The content is 6.7%, and the organic impurity content is 1.7%.

[0061] Adopt the same method of embodiment 1 to separate, the main parameters of the separation process and most of the product quality indicators are basically close to embodiment 1, but SO 4 2- Content is 307.07ppm; Slightly higher than embodiment 1, but lower than SO 4 2- content.

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Abstract

The invention discloses a preparation method for high purity reactive black used for digital ink-jet printing, which belongs to the technical field of the fine chemical industry. According to the method, reactive black is used as a raw material, the processes of removal of particle impurities by using a microfiltration membrane, desalination and purification by using a charged mosaic membrane and condensation by using a nanofiltration membrane are utilized, and therefore, a high purity liquid dye is prepared for preparation of digital ink-jet printing ink; to facilitate preservation and transport, the high purity liquid dye can undergo spray drying so as to prepare a high purity solid dye. A product in the invention has low content of impurities; in terms of the solid dye obtained after spray drying, Cl<-> is no more than 200 ppm, SO4<2-> is no more 400 ppm, Ca<++> is no more 800 ppm, Mg<++> is no more 400 ppm, and Fe<++> is no more 100 ppm; the product is applicable to preparation of digital printing ink. The method provided in the invention is simple and feasible, is convenient for industrial production and is easy to popularize and apply; the product prepared by using the method can substitute imported products, thereby reducing cost for enterprises and promoting development of the domestic digital printing industry.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and relates to a preparation method of reactive black, in particular to a preparation method of high-purity reactive black for digital inkjet printing. Background technique [0002] Digital inkjet printing technology is a non-contact printing technology that can achieve high-speed, high-quality, low-noise monochrome and color text and image printing. In addition to ordinary paper, printing media can also directly spray images onto the surface of textiles, plastics and other media. In recent years, digital printing has developed rapidly, and digital printing ink manufacturing has become a new economic growth point. Textile digital inkjet printing inks have high requirements on the quality of raw materials, and most of the high-purity dyes used need to be imported from abroad, which increases production costs and reduces the competitiveness of enterprises in the international market. At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/54C09B67/26C09B67/24
Inventor 张浩勤秦国胜白雪梁朝民曹华伟胡喻飞张敬一単盼娣张亚涛张婕刘金盾
Owner ZHENGZHOU UNIV
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