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A kind of c.i. acid yellow 23 dye and its clean production process

A production process and cleaning technology, applied in the field of dyes, can solve the problems of limited scope of use, long synthesis routes, and product quality degradation, and achieve the effects of clean production process, stable quality, and improved yield.

Active Publication Date: 2022-04-08
赤峰市恒荣化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inconvenient operation of the processes of ① and ② and the high cost of raw materials, in recent years, domestic enterprises have basically selected the route of ③ to produce the compound shown in formula (I). Although the raw materials and production costs of ③ are low, this synthetic route has a long process and produces by-products. There are many products, and the purity and content of the material obtained by direct hydrolysis are low. Although the industry basically adds a refining and beating process, due to the limitation of synthesis and impurity levels, the purity of the product is at most 99%-99.5%, especially The composition of 4,4`-(diazoimino)dibenzenesulfonic acid will exceed the standard, which will reduce the quality of the product and limit the scope of use

Method used

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  • A kind of c.i. acid yellow 23 dye and its clean production process
  • A kind of c.i. acid yellow 23 dye and its clean production process
  • A kind of c.i. acid yellow 23 dye and its clean production process

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Effect test

Embodiment 1

[0079] Embodiment 1 of the present invention provides a kind of C.I. Acid Yellow 23 dyestuff, and its clean production process is specifically:

[0080] (1) react p-aminobenzenesulfonic acid in a medium of ice water, hydrochloric acid and sodium nitrite at 10°C for 1.5 hours to generate diazonium salt of p-aminobenzenesulfonic acid, and obtain solution 1;

[0081] (2) After adding sodium nitrite in the sulfamic acid elimination solution 1, add dimethyl 2-acetylsuccinate for a coupling reaction. At 15°C, adjust the pH to 4.3 for the reaction. After the reaction, adjust the pH to 7. Ring-closing reaction to obtain coupling components;

[0082] (3) p-aminobenzenesulfonic acid is reacted at 10°C for 1.5 hours in the medium of ice water, hydrochloric acid and sodium nitrite, and the diazonium salt of p-aminobenzenesulfonic acid should be generated, and solution 2 is obtained;

[0083] (4) After adding sulfamic acid to eliminate the sodium nitrite in the solution 2, add the couplin...

Embodiment 2

[0090] Embodiment 2 of the present invention provides a kind of C.I. Acid Yellow 23 dyestuff, and its clean production process is specifically:

[0091] (1) react p-aminobenzenesulfonic acid in a medium of ice water, hydrochloric acid and sodium nitrite at 15°C for 0.8h to generate diazonium salt of p-aminobenzenesulfonic acid, and obtain solution 1;

[0092] (2) After adding sodium nitrite in the sulfamic acid elimination solution 1, add dimethyl 2-acetylsuccinate for a coupling reaction. At 25°C, adjust the pH to 5 for the reaction. After the reaction, adjust the pH to 7.5. Ring-closing reaction to obtain coupling components;

[0093] (3) p-aminobenzenesulfonic acid is reacted at 15°C for 0.8h in the medium of ice water, hydrochloric acid and sodium nitrite, and the diazonium salt of p-aminobenzenesulfonic acid should be formed, and solution 2 is obtained;

[0094] (4) After adding sulfamic acid to eliminate the sodium nitrite in the solution 2, add the coupling component o...

Embodiment 3

[0101] Embodiment 3 of the present invention provides a kind of C.I. Acid Yellow 23 dyestuff, and its clean production process is specifically:

[0102] (1) react p-aminobenzenesulfonic acid in a medium of ice water, hydrochloric acid and sodium nitrite at 12°C for 1 hour to generate diazonium salt of p-aminobenzenesulfonic acid, and obtain solution 1;

[0103] (2) After adding sodium nitrite in the sulfamic acid elimination solution 1, add dimethyl 2-acetylsuccinate for a coupling reaction. At 20°C, adjust the pH to 4.7 for the reaction. After the reaction, adjust the pH to 7.1. Ring-closing reaction to obtain coupling components;

[0104] (3) p-aminobenzenesulfonic acid is reacted at 12°C for 1 hour in the medium of ice water, hydrochloric acid and sodium nitrite, and the diazonium salt of p-aminobenzenesulfonic acid should be generated to obtain solution 2;

[0105] (4) After adding sulfamic acid to eliminate the sodium nitrite in the solution 2, add the coupling component...

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Abstract

The present invention relates to the technical field of dyes. More specifically, the present invention relates to a C.I. acid yellow 23 dye and its clean production process. The purity of the C.I. acid yellow 23 dye is greater than 99.6wt% and the content is greater than 90wt%. Its scope of application and use; the production process of the C.I. Acid Yellow 23 dye is simple, the quality of the obtained C.I. Acid Yellow 23 dye is stable, and at the same time, resources can be reused, and the entire production process is clean and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of dyes, more specifically, the invention relates to a C.I. acid yellow 23 dye and a clean production process thereof. Background technique [0002] For example, the compound of formula (I) is an azo dye widely used in the printing and dyeing industry and the field of pigment coloring. As an acid dye (C.I. Acid Yellow 23), it is mainly used for dyeing and direct printing of nylon, wool, silk and other textiles. As a pigment colorant (C.I. food dye 4), it is not only used in the coloring of food, cosmetics, detergents, fertilizers, pesticides, and wood, but also can be made into ink, colored pens and other cultural and educational supplies; it can be used for paper , leather, soap, plastic coloring. With the development of the economy, the demand for consumer goods increases, especially the demand for colorants increases year by year. At present, the demand for colorants accounts for more than 60% of the to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B27/00C07D231/46
CPCC09B27/00C07D231/46
Inventor 张为洪刘丰杰沙晓伟邵腾威
Owner 赤峰市恒荣化工有限公司
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