Process for preparing low-salt high-strength active yellow dye

A yellow dye, high-strength technology, applied in azo dyes, organic dyes, monoazo dyes, etc., can solve the problems of low technological content, low added value, low price, etc., and achieve short drying time and stable color light , the effect of generating less

Inactive Publication Date: 2003-12-31
马朝亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the dye varieties produced in our country, there are few high-end and high-end dyes, the products have low technological content, and the added value is not high, so the price is low

Method used

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  • Process for preparing low-salt high-strength active yellow dye
  • Process for preparing low-salt high-strength active yellow dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 105kg of 100% 2-naphthylamine-3,6,8-trisulfonic acid into the diazotization reaction tank, add 25kg of 100% hydrochloric acid, 18.8kg of sodium nitrite, and react for 1 hour at 5°C to obtain diazonium For the salt solution, the diazonium salt solution was added to (100% m-urea) 40.2kg m-urea solution for coupling reaction, the pH of the solution was adjusted to 5 with soda ash, the temperature was controlled below 20°C, and the reaction was maintained for 3 hours to obtain coupling solution.

[0036] In the condensation reaction tank, add 50 kg of cyanuric chloride, disperse 0.8 kg of sodium 1.4-dibutylnaphthalene-6-sulfonate, and carry out ice grinding for 1 hour with an appropriate amount of ice, and then add the coupling liquid to the cyanuric chloride ice grinding liquid Carry out a condensation reaction in a medium temperature, control the temperature below 15°C, control the pH value to 4-7, keep the reaction for 3 hours, then add 76kg of 100% meta-ester to the...

Embodiment 2

[0037] Embodiment 2 This embodiment includes the following steps:

[0038] a. Dissolution and diazotization of 2-naphthylamine-3,6,8-trisulfonic acid

[0039] First, 160 kg of quantitative arylamine 2-naphthylamine-3,6,8-trisulfonic acid industrial product is added in an antiseptic reaction pot, 90 kg of excess hydrochloric acid is added, and then quantitative sodium nitrite solution is added for diazotization reaction. At the same time, the induced draft fan was turned on to recover the gas. During the sodium addition process, the starch potassium iodide test paper was kept slightly blue and the Congo red test paper was blue. Under these conditions, the diazo solution was prepared for 1 hour.

[0040] b. Coupling reaction

[0041] Take 40kg of m-urea, slowly add it to the diazo solution, and ensure that the temperature of the material is below 20°C, and the feeding time is 20 minutes. After the addition, slowly adjust the pH to 5 with a soda ash solution, that is, it is advi...

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Abstract

The low-salinity and high-strength active yellow dye is prepared with 2-naphthylamine-3, 6, 8-trisulfonic acid as material and through diazotization and condensation. The present invention features the addition of dispersant in the first condensation, the addition of meta-ester in the second condensation, nano filtering film technology for material liquid separation, pressurized spraying pelletizing and drying and less "three waste" exhaust in the production process. The produced active yellow dye has low salinity, high strength, high color fixation, and other advantages.

Description

technical field [0001] The invention relates to a preparation method of a low-salt high-strength reactive yellow dye, which belongs to dye production [0002] technology field. Background technique [0003] Dyestuff is an important export product of our country, especially in recent years, the world's dyestuff production has moved eastward, and my country has become the world's largest dyestuff country. However, among the varieties of dyes produced in my country, there are few high-end and high-end dyes, the products have low technological content, and the added value is not high, so the price is low. Especially with the continuous increase of people's material and cultural level, a healthy production and living space is increasingly required. In the dye industry, there are widespread environmental protection problems. To make dyes environmentally friendly and energy-saving, they must be fully resolved from the production of dyes to their use, which puts forward higher req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/00
Inventor 马朝亮
Owner 马朝亮
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