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Preparation method of C.I. Pigment yellow 83

A technology of pigment yellow and hydrochloric acid, applied in the field of pigment yellow, can solve the problems of different performance of dye products, different chromophores, different shades, etc., and achieve the effect of product dispersibility, uniform particle size distribution, and uniform particle size.

Pending Publication Date: 2022-05-31
SHANGYU DAXIN COLOR CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current synthesis process of Pigment Yellow 83, in the patent 200710112920.2, a two-component compounding method is adopted to configure the diazo liquid, but the chromophoric groups of the double nitrogen components are different, and one is an electron-withdrawing group (chlorine group), one is an electron-donating group (methyl group), which brings different shades, which leads to differences in the performance of dye products
In patent 201610021757.8, nitrosyl sulfuric acid is used as nitrite, and trisodium phosphate is used as a pH buffer in the follow-up, resulting in not only sulfate, but also phosphate and a small amount of nitrate in the resulting wastewater, resulting in subsequent treatment and its difficult

Method used

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  • Preparation method of C.I. Pigment yellow 83

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Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of C.I. Pigment Yellow 83, comprising the steps:

[0020] Step 1, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dichlorobenzidine and beating at room temperature for 20-40min to obtain 3,3'-dichlorobenzidine slurry for use; the hydrochloric acid adopts 30% hydrochloric acid , and the mol ratio of hydrochloric acid and 3,3'-dichlorobenzidine is 1:1, and the mass ratio of described water and hydrochloric acid is 2:1;

[0021] Step 2, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dimethoxybenzidine and beating at room temperature for 20 minutes to obtain a 3,3'-dimethoxybenzidine slurry for use; the hydrochloric acid is 30% The hydrochloric acid, and the mol ratio of hydrochloric acid and 3,3'-dimethoxybenzidine is 1.5:1, and the mass ratio of described water and hydrochloric acid is 2:1;

[0022] Step 3, stir water and sodium nitrite evenly to form a nitrous acid solution, and the mass ratio...

Embodiment 2

[0027] A preparation method of C.I. Pigment Yellow 83, comprising the steps:

[0028] Step 1, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dichlorobenzidine and beating at room temperature for 40min to obtain 3,3'-dichlorobenzidine slurry, which is for later use; the hydrochloric acid is 30% hydrochloric acid, and The mol ratio of hydrochloric acid and 3,3'-dichlorobenzidine is 1.1:1, and the mass ratio of described water and hydrochloric acid is 3:1;

[0029] Step 2, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dimethoxybenzidine and beating at room temperature for 40 minutes to obtain 3,3'-dimethoxybenzidine slurry for use; the hydrochloric acid is 30% The hydrochloric acid, and the mol ratio of hydrochloric acid and 3,3'-dimethoxybenzidine is 1.8:1, and the mass ratio of described water and hydrochloric acid is 3:1;

[0030] Step 3, stir water and sodium nitrite to form a nitrous acid solution, and the mass rati...

Embodiment 3

[0035] A preparation method of C.I. Pigment Yellow 83, comprising the steps:

[0036] Step 1, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dichlorobenzidine and beating at room temperature for 30 minutes to obtain 3,3'-dichlorobenzidine slurry, which is for later use; the hydrochloric acid is 30% hydrochloric acid, and The mol ratio of hydrochloric acid and 3,3'-dichlorobenzidine is 1:1, and the mass ratio of described water and hydrochloric acid is 2:1;

[0037] Step 2, adding hydrochloric acid to the water and stirring evenly, then adding 3,3'-dimethoxybenzidine and beating at room temperature for 30 minutes to obtain 3,3'-dimethoxybenzidine slurry for use; the hydrochloric acid is 30% The hydrochloric acid, and the mol ratio of hydrochloric acid and 3,3'-dimethoxybenzidine is 1.6:1, and the mass ratio of described water and hydrochloric acid is 2:1;

[0038] Step 3, stir water and sodium nitrite evenly to form a nitrous acid solution, and the...

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Abstract

The invention belongs to the technical field of pigment yellow, and particularly relates to a preparation method of C.I. Pigment yellow 83, 3, 3 '-dichlorobenzidine and 3, 3'-dimethoxybenzidine are taken as dual nitrogen components, diazotization is carried out, and then coupling is carried out with 2, 5-dimethoxy-4-chlorodiacetanilide dispersed by high-substituted hydroxy propyl cellulose to obtain the pigment yellow 83. By utilizing the dispersity and chemical inertness of the high-substituted hydroxypropyl cellulose, the particle size of the product is uniform, the particles are soft, and the product has excellent light resistance, heat resistance, solvent resistance and migration resistance.

Description

technical field [0001] The invention belongs to the technical field of pigment yellow, and in particular relates to a preparation method of C.I. Pigment Yellow 83. Background technique [0002] With the development of fine chemicals, the development of organic pigments is extremely rapid, and is widely used in printed matter, automobile manufacturing industry, coating industry, polymer material processing industry and textile fibers and other industries. As one of the most commonly used pigments in the organic pigment yellow series, Pigment Yellow 83 has been widely used in the fields of high-end automotive topcoats, advanced engineering plastics, resins and fiber products. [0003] Pigment Yellow 83, red light yellow powder. The heat resistance is stable at 200℃. Other properties, such as light fastness, solvent resistance, acid resistance, and alkali resistance are excellent. Pigment Yellow 83 has a specific surface area of ​​69m 2 / g, has excellent light resistance, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B35/035C09B35/10C09B67/36
CPCC09B35/035C09B35/105C09B67/0079
Inventor 孙庆伟贝柯峰陈建新吕文华
Owner SHANGYU DAXIN COLOR CHEM CO LTD
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