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Preparation method of yellow pigment

A technology of yellow pigments and amino groups, which is applied in the field of preparation of yellow pigments, can solve problems such as increased production costs, waste of raw materials, loss, etc., and achieves the effect of cost reduction and low cost of raw materials

Active Publication Date: 2014-06-25
浙江东海新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The price of Pigment Yellow 183 is expensive, and the preparation process of Pigment Yellow 183 is relatively simple, and there are many defects:
[0015] (1) The waste of raw materials is serious, the distribution ratio of the coupling components is greater than that of the diazo components, and the excess coupling components will be lost to the sewage during the solid-liquid separation and rinsing process, which not only wastes raw materials, but also improves production cost;
[0016] (2) Use ammonia water as a solvent to dissolve 2-amino-4,5-chlorobenzenesulfonic acid, causing the ammonia nitrogen index in the product to exceed the discharge standard. It is difficult and costly to treat ammonia nitrogen before sewage discharge

Method used

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  • Preparation method of yellow pigment
  • Preparation method of yellow pigment
  • Preparation method of yellow pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) At a temperature of 40°C, 450kg of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid are dissolved in 30% of the mass fraction NaOH aqueous solution, the molar ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid is 1.5:0.5, and diluted with water, the solution The mass ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid to NaOH is 1:2.5, and the mass fraction of 2-amino-4-chloro-5-methylbenzenesulfonic acid is 3%;

[0056] (2) Add NaNO to the solution obtained in step (1) 2 , EDTA and 10% hydrochloric acid, 2-amino-4-chloro-5-methylbenzenesulfonic acid, NaNO 2 And the molar ratio of HCl is 1.5: 2.0: 5.0, the mass of EDTA is 0.1% of the total mass of these four components, and at a temperature of 0-5°C, react for 1 h to obtain the diazo component;

[0057] (3) Dissolving 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone in 30% NaOH aqueous solution, 1-(3'-sulfonic ...

Embodiment 2

[0060] (1) At a temperature of 40°C, 450kg of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid are dissolved in 30% of the mass fraction NaOH aqueous solution, the molar ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid is 1.5:0.5, and diluted with water, the solution The mass ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid to NaOH is 1:2.5, and the mass fraction of 2-amino-4-chloro-5-methylbenzenesulfonic acid is 4%;

[0061] (2) Add NaNO to the solution obtained in step (1) 2 , EDTA and 10% hydrochloric acid, 2-amino-4-chloro-5-methylbenzenesulfonic acid, NaNO 2 And the molar ratio of HCl is 1.5: 2.0: 5.0, the mass of EDTA is 0.1% of the total mass of these four components, and at a temperature of 0-5°C, react for 1 h to obtain the diazo component;

[0062] (3) Dissolving 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone in 30% NaOH aqueous solution, 1-(3'-sulfonic ...

Embodiment 3

[0065] (1) At a temperature of 40°C, 450kg of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid are dissolved in 30% of the mass fraction NaOH aqueous solution, the molar ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid is 1.5:0.5, and diluted with water, the solution The mass ratio of 2-amino-4-chloro-5-methylbenzenesulfonic acid to NaOH is 1:2.5, and the mass fraction of 2-amino-4-chloro-5-methylbenzenesulfonic acid is 5%;

[0066] (2) Add NaNO to the solution obtained in step (1) 2 , EDTA and 10% hydrochloric acid, 2-amino-4-chloro-5-methylbenzenesulfonic acid, NaNO 2 And the molar ratio of HCl is 1.5: 2.5: 5.0, the mass of EDTA is 0.1% of the total mass of these four components, and at a temperature of 0-5°C, react for 1 h to obtain the diazo component;

[0067] (3) Dissolving 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone in 30% NaOH aqueous solution, 1-(3'-sulfonic ...

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Abstract

The invention discloses a preparation method of a yellow pigment, which comprises the following steps of dissolving 2-amino-4-chlorine-5-methyl benzenesulfonic acid and 2-amino-4-methyl-5-chlorobenzenesulfonic acid in an NaOH aqueous solution A at 35-45 DEG C, adding NaNO2, EDTA (Ethylene Diamine Tetraacetic Acid) and hydrochloric acid for diazo reaction, obtaining a diazo component, dissolving 1-(3'-sulfonic acid phenyl)-3-methyl-5-pyrazolone in an NaOH aqueous solution B, adding a dispersing agent, obtaining a coupling component, adding the coupling component to the diazo component within 15-25min at 10-20 DEG C for coupling reaction, adding sodium acetate to keep pH of a reaction system to be 5-6, conducting reaction till the diazo component is consumed, cooling an obtained mixed solution to 0-5 DEG C, adding CaCl2, and obtaining the yellow pigment by post treatment. Raw materials adopted by the method are low in price, and the prepared pigment can be used for substituting pigment yellow 183.

Description

technical field [0001] The invention relates to the field of pigment production and processing, in particular to a preparation method of a yellow pigment. Background technique [0002] Pigment is a powdered substance used for coloring. It is insoluble in water, oil, resin, organic solvent and other media, but can be evenly dispersed in these media and can color the media, so it has a certain covering power. [0003] Pigments are usually measured by the following indicators: [0004] (1) Color: Pigments that selectively absorb and scatter visible light can show yellow, red, blue, green and other colors under natural light conditions. [0005] (2) Tinting power: The ability of colored pigments to absorb incident light can be expressed by the relative percentage equivalent to the tinting power of standard pigment samples. [0006] (3) Covering power: the ability to cover the surface color of the substrate in the film-forming substance. Commonly used to cover an area of ​​1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B29/50C09B67/20
Inventor 陈阿胖陈江李杏园
Owner 浙江东海新材料科技股份有限公司