Preparation method of toluylene triazine liquid fluorescent brightener composite

A technology of stilbene triazine and fluorescent whitening agent, applied in the direction of luminescent/fluorescent substance addition, non-polymer organic compound addition, organic chemistry, etc., can solve the problems of low fluorescence intensity and low whiteness, and achieve whiteness High, good whitening effect, the effect of reducing the difficulty of post-processing

Inactive Publication Date: 2010-02-24
山西晋光化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of this invention is to provide a kind of preparation method of the three-component stilbene triazine liquid fluorescent whitening agent composition with symmetrical and asymmetrical structure, to overcome existing single-component liquid fluorescent whitening agent fluorescence intensity relatively Disadvantages of low and low whiteness

Method used

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  • Preparation method of toluylene triazine liquid fluorescent brightener composite
  • Preparation method of toluylene triazine liquid fluorescent brightener composite
  • Preparation method of toluylene triazine liquid fluorescent brightener composite

Examples

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Embodiment 1

[0037] Step 1 Add 100g of crushed ice to a 500ml beaker, adjust the pH value to about 1.0 with 1.5ml of 30% hydrochloric acid, stir and cool down to 0±2°C, add 25.0g of cyanuric chloride, start stirring, and beat for 1h (keep the pH The value is around 1.0, and the temperature is around 0°C). Add 23.5g of p-aminobenzenesulfonic acid, stir for 20min, adjust pH=3 with 30% NaOH solution, and keep this pH value for 1.5h, then adjust pH=5, and keep this pH value, react until detected by amino reagent Until the amino group disappears, the reaction ends.

[0038] In the second step, add the aqueous solution prepared by 24.2g of DSD acid to the above reaction solution at a constant speed within 5 to 10 minutes, adjust the pH of the reaction solution to 5.5 to 6 with 30% NaOH solution, and raise the temperature to 50°C, continuously add 30% NaOH The solution was adjusted to ensure that the pH of the reaction solution was 5.5-6.0, and the temperature of the system was kept at 50° C., a...

Embodiment 2

[0046] The 3rd step adds the mixture of 8.66g morpholine and 5.22g diethanolamine, other operation process is the same as embodiment 1. The ratio of each component is determined by high performance liquid chromatography, and the mass ratio of the three components is (III):(IV):(V)=3:6:7.

Embodiment 3

[0048] The 3rd step adds the mixture of 6.5g morpholine and 7.8g diethanolamine, other operation process is the same as embodiment 1. The ratio of each component is determined by high performance liquid chromatography, and the mass ratio of the three components is (III):(IV):(V)=4:5:5.6.

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Abstract

The invention provides a preparation method of symmetric and asymmetric toluylene triazine liquid fluorescent brightener composite expressed by the structural formulas (III), (VI) and (V), comprisingthe following steps: taking cyanuric chloride, sulfanilic acid, 4, 4-diaminobenzil-2, 2-disulfonic acid, morpholine and diethanol amine as raw materials; synthesizing by the three steps of reaction; and desalinating and filtering by means of nanofiltration membrane filtration. The liquid fluorescent brightener composite has a built synergistic effect and better brightening effect than a single composite; and the method not only can improve the quality of the fluorescent brightener, but also can reduce the consumption of amounts of raw materials, and greatly elevates product yield and quality.

Description

technical field [0001] The invention relates to a preparation method of a special chemical auxiliary agent for making high-grade paper, in particular to a preparation method of a tetrasulfonic acid stilbene triazine liquid fluorescent whitening agent composition. Background technique [0002] Bistriazine aminostilbene type fluorescent whitening agent is a kind of fluorescent whitening agent that has been researched and applied earlier, and is widely used in papermaking, textiles, coatings, detergents and other fields. The early representative of this type of variety, VBL, is a variety with a wide range of applications and a large output. Because it is a disulfonic acid product, it has poor water solubility, low yellowing point, poor whitening strength, and narrow application range. shortcoming. In order to overcome the above shortcomings, people have developed a series of tetrasulfonic acid liquid optical brightener varieties. [0003] Patent CN 1287200A introduces a liqui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/30D21H17/09C07D251/70
Inventor 杨建新李钢王运科
Owner 山西晋光化工有限公司
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