Preparation method of pigment red 57: 1

A pigment red and process technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of pigment dispersion and low coloring strength, achieve the effect of changing particle size and shade, and improving transparency

Active Publication Date: 2020-09-25
PENGLAI XINGUANG PIGMENT CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pigments prepared by this method have disadvantages such as low dispersibility and low tinting strength.

Method used

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  • Preparation method of pigment red 57: 1
  • Preparation method of pigment red 57: 1

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: (1) 120g (1.5mol) of sodium hydroxide solution 120g (1.5mol) of 187.2g (1mol) 4-aminotoluene-3-sulfonic acid and mass fraction are joined in the reaction bottle with stirring device, 4B After the acid is completely dissolved, cool down, add 283.9g (2.8mol) of hydrochloric acid solution with a mass fraction of 36% at 0°C, stir for 5min, then add 236.9g (1.03mol) of a 30% sodium nitrite aqueous solution to it , stirred for 35 minutes, then added 194.3 g (1.05 mol) of 40% calcium hydroxide solution, and stirred for 5 minutes.

[0032] (2) Add 2,3-acid 178.8g (0.95mol) in another reaction flask with stirring device, mass fraction is 50% sodium hydroxide solution 98.8g (1.235mol), 2-aminophenol-4 -1.35g of sulfonic acid and 1.35g of 1-amino-2-naphthol-4-sulfonic acid, stirred and dissolved at 25°C and continued to react for 20min, then added 21.2g of triethanolamine dodecylbenzenesulfonate, continued Stir for 10 min.

[0033] (3) Add the mixed solution obtain...

Embodiment 2

[0035] Embodiment 2: (1) 187.2g (1mol) 4-aminotoluene-3-sulfonic acid and mass fraction are 50% sodium hydroxide solution 160g (2mol) to join in the reaction bottle with stirring device, 4B acid After completely dissolving, lower the temperature, add 354.9 g (3.5 mol) of hydrochloric acid solution with a mass fraction of 36% at 10° C., stir for 10 min, then add 241.5 g (1.05 mol) of a 30% sodium nitrite aqueous solution to it, The reaction was stirred for 39 minutes, then 207.2 g (1.12 mol) of 40% calcium hydroxide solution was added thereto, and stirred for 10 minutes.

[0036] (2) Add 182.6g (0.97mol) of 2,3-acid in another reaction flask with a stirring device, 116.4g (1.455mol) of sodium hydroxide solution with a mass fraction of 50%, 1-amino-2- 1.52g of naphthol-4-sulfonic acid and 3.04g of 3-amino-4-methoxybenzenesulfonic acid, stirred and dissolved at 30°C and continued to react for 30min, then added 29.7g of 4-hydroxybutyric acid hydrazine, continued Stir for 20min. ...

Embodiment 3

[0039] Example 3: (1) 140g (1.75mol) of sodium hydroxide solution 140g (1.75mol) of 187.2g (1mol) 4-aminotoluene-3-sulfonic acid and mass fraction of 50% are added in a reaction flask with a stirring device, 4B After the acid was completely dissolved, the temperature was lowered, and 304.2 g (3.0 mol) of hydrochloric acid solution with a mass fraction of 36% was added at 5° C. After stirring for 5 minutes, 243.8 g (1.06 mol) of a 30% sodium nitrite aqueous solution was added thereto , stirred for 37 minutes, then added 194.3 g (1.05 mol) of 40% calcium hydroxide solution, and stirred for 5 minutes.

[0040] (2) Add 180.7g (0.96mol) of 2,3 acid 180.7g (0.96mol) and 105.6g (1.32mol) of sodium hydroxide solution with a mass fraction of 50% in another reaction flask with a stirring device, 2-aminophenol-4- 1.2g of sulfonic acid, 1.2g of 1-amino-2-naphthol-4-sulfonic acid, and 1.2g of 3-amino-4-methoxybenzenesulfonic acid, stir and dissolve, stir and dissolve at 25°C and continue t...

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Abstract

Provided is a process for preparing pigment red 57: 1. Through process improvement and adding of 2-aminophenol-4-sulfonic acid, 1-amino-2-naphthol-4-sulfonic acid or 3-amino-4-methoxybenzenesulfonic acid as a second coupling component, inter-particle force is attenuated, and particle size and color light are changed. Meanwhile, triethanolamine dodecylbenzene sulfonate, 4-hydroxybutyrate hydrazineand 4-hydroxybutyl acrylate are selected as a modifying substance and a dispersing agent to enhance the coloring power, effectively control the pigment crystal growth and improve the flowability. Microwave drying is adopted to improve the drying efficiency and avoid crystal form dehydration conversion. Airflow mill drying is adopted to reduce the average particle size of the pigment and increase the coloring strength. The pigment prepared by the technology effectively solves the problems of poor flowability, low coloring strength and the like of the traditional pigment.

Description

technical field [0001] The invention belongs to the technical field of organic raw material preparation, and in particular relates to a preparation method of C.I. Pigment Red 57:1. Background technique [0002] Organic pigments are an important class of colored substances used for coloring objects. Compared with inorganic pigments, it not only has a wide variety and complete color spectrum, but also has bright colors and high tinting strength. It is widely used in the coloring of inks, paints, plastics, rubber, synthetic fibers and daily chemicals, as well as the pigment printing of fabrics. C.I. Pigment Red 57 is the most important pigment for high-quality printing red ink. Its lake salts include calcium, strontium, barium, and manganese. Among them, calcium salt is the most widely used, C.I. Pigment Red 57:1, accounting for about 10% of the output of red pigments a quarter of. [0003] C.I. Pigment Red 57:1 is also known as Lisol Baohong. The existing preparation technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/20C09B29/03C09B29/26C09B29/30C09B29/08
CPCC09B67/0065C09B29/0007C09B29/26C09B29/30C09B29/0834
Inventor 徐珍香郑智剑
Owner PENGLAI XINGUANG PIGMENT CHEM
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