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Synthesis method of high-speed, high-tinting-strength and odorless pigment yellow

A synthesis method and coloring power technology, applied in chemical instruments and methods, organic dyes, azo dyes, etc., can solve problems such as high viscosity of feed liquid, low reaction efficiency, and more foaming, and achieve good stability and promote the system stable effect

Pending Publication Date: 2022-07-12
CROWN CHEMICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention proposes a high-speed, high-tinting strength and no-odor pigment yellow synthesis method, which solves the problems of high viscosity of the material liquid, extremely low reaction efficiency, and incomplete reaction without using additives in the existing pigment synthesis process. , the currently used additives reduce the viscosity of the feed liquid to a certain extent and improve the reaction efficiency, but there are still problems of high foaming and low reaction efficiency

Method used

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  • Synthesis method of high-speed, high-tinting-strength and odorless pigment yellow
  • Synthesis method of high-speed, high-tinting-strength and odorless pigment yellow

Examples

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Embodiment 1

[0032] refer to figure 1 , a high-speed, high tinting strength and no odor-free pigment yellow synthesis method, comprising the following steps:

[0033] S1: Preparation of diazo liquid: The preparation of diazo liquid includes 3,3'-dichlorobenzidine beating and diazotization; the 3,3'-dichlorobenzidine beating is specifically: weigh 1 part of 3,3' - Dichlorobenzidine (100%), adding 2.07 parts of dilute hydrochloric acid solution (20%) and 5.33 parts of water, beating for 1 hour to obtain 3,3'-dichlorobenzidine emulsion; the diazotization is specifically: adding An appropriate amount of ice was used to cool the prepared 3,3'-dichlorobenzidine emulsion to below 0 °C; 1.83 parts of sodium nitrite solution (31%) was slowly added to the 3,3'-dichlorobenzidine emulsion, and added The time is 5min. After adding, ensure that the starch KI test paper is dark blue, and stir well. The stirring time is 1h to ensure sufficient reaction, and the diazo liquid is obtained;

[0034] S2: Pre...

Embodiment 2

[0040] refer to figure 1 , a high-speed, high tinting strength and no odor-free pigment yellow synthesis method, comprising the following steps:

[0041] S1: Preparation of diazo liquid: the preparation of diazo liquid includes 3,3'-dichlorobenzidine beating and diazotization; the 3,3'-dichlorobenzidine beating is specifically: weighing 2 parts of 3,3' - Dichlorobenzidine (100%), adding 4 parts of dilute hydrochloric acid solution (20%) and 10 parts of water, beating for 2 hours to obtain 3,3'-dichlorobenzidine emulsion; the diazotization is specifically: adding An appropriate amount of ice was used to cool the prepared 3,3'-dichlorobenzidine emulsion to below -1°C; 3 parts of sodium nitrite solution (31%) were slowly added to the 3,3'-dichlorobenzidine emulsion, The addition time is 8min. After the addition, ensure that the starch KI test paper is dark blue, and fully stir, and the stirring time is 2h to ensure sufficient reaction, and the diazo liquid is obtained;

[0042]...

Embodiment 3

[0048] refer to figure 1 , a high-speed, high tinting strength and no odor-free pigment yellow synthesis method, comprising the following steps:

[0049] S1: preparation of diazo liquid: the preparation of diazo liquid includes 3,3'-dichlorobenzidine beating and diazotization; the 3,3'-dichlorobenzidine beating is specifically: weighing 3 parts of 3,3' - Dichlorobenzidine (100%), adding 6.21 parts of dilute hydrochloric acid solution (20%) and 15.99 parts of water, beating for 3 hours to obtain 3,3'-dichlorobenzidine emulsion; the diazotization is specifically: adding An appropriate amount of ice was used to cool the prepared 3,3'-dichlorobenzidine emulsion to below -2°C; 5.49 parts of sodium nitrite solution (31%) was slowly added to the 3,3'-dichlorobenzidine emulsion, The addition time is 10min. After the addition, ensure that the starch KI test paper is dark blue, and fully stir, and the stirring time is 3h to ensure sufficient reaction, and the diazo liquid is obtained; ...

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Abstract

The invention belongs to the field of pigment yellow synthesis, particularly relates to a high-speed, high-tinting-strength and odorless pigment yellow synthesis method, and aims to solve the problems of high material liquid viscosity, extremely low reaction efficiency, incomplete reaction and the like due to no use of auxiliaries in the existing pigment synthesis process. In order to solve the problems of high bubbling quantity and low reaction efficiency in the prior art, the invention provides the following scheme: the method comprises the following steps: S1, preparing a diazonium solution; s2, preparation of a coupling liquid: 4-chloro-2, 5-dimethoxyacetoacetanilide is subjected to clarification and acid precipitation; and S3, coupling reaction: adding the prepared diazonium liquid into the coupling liquid. The invention has good water solubility, excellent nonionic surfactant, good washing decontamination ability and strong emulsibility, can excellently improve the reaction efficiency effect, can effectively improve the reaction rate, and can shorten the coupling reaction time.

Description

technical field [0001] The invention relates to the technical field of pigment yellow synthesis, in particular to a method for synthesizing pigment yellow with high speed, high tinting strength and no peculiar smell. Background technique [0002] In the synthesis method of the traditional pigment yellow P.Y.83 series, due to the use of organic amine additives, the problems of excessive foaming and low reaction efficiency occur during the reaction process, and the reaction is relatively easy to be incomplete, and finally the diazo component is excessive. ;Due to the unavoidable introduction of small molecular amines in the synthesis process of organic amine additives, once high temperature is involved in the downstream application process, odors are often emitted, that is, small molecular amines are volatilized at high temperature. adversely affect its application. [0003] No additives are used in the process of pigment synthesis, which often cause problems such as high vis...

Claims

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Application Information

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IPC IPC(8): C09B35/10C09B35/035C09B67/36
CPCC09B35/10C09B35/035C09B67/0079Y02P20/10
Inventor 杨宗泽沈秋萍
Owner CROWN CHEMICAL CORP
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