Process for producing solvent yellow GR

A production process and solvent technology, applied in the production process field of solvent yellow GR, can solve the problems of serious corrosion, high COD, complex preparation process of chromium compound chromium fluoride, etc., and achieve the effects of strong corrosion and simple process steps.

Inactive Publication Date: 2013-08-28
南通市争妍新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation process of chromium fluoride is complicated. The product of chromium reaction contains a large amount of hydrofluoric acid, which is severel...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The production process of solvent yellow GR comprises the following process steps: a coupling reaction step, a chromization reaction step, a neutralization reaction step and an acid precipitation reaction step,

[0021] Coupling reaction steps: with 4-nitro-2-aminophenol-6-sulfonic acid and acetoacetaniline as basic raw materials, 234kg 4-nitro-2-aminophenol-6-sulfonic acid and sodium nitrite in hydrochloric acid excess Under certain conditions, react at -5°C for 0.5 hours to generate 1,2diazooxybenzene-4-nitro-6-sulfonic acid and sodium chloride, and then react with 180kg acetoacetaniline at 50°C under alkaline conditions Generate azo A and water after reacting for 1 hour;

[0022] Chromating reaction step: add the azo compound A obtained in the above steps into the reaction kettle, then add water, 200kg chromium chloride and 50kg sodium carbonate, control the temperature at 90°C, and react for 5 hours to form a complex with sodium sulfonate compound and HCL;

[0023...

Embodiment 2

[0026] The production process of solvent yellow GR comprises the following process steps: a coupling reaction step, a chromization reaction step, a neutralization reaction step and an acid precipitation reaction step,

[0027] Coupling reaction steps: with 4-nitro-2-aminophenol-6-sulfonic acid and acetoacetaniline as basic raw materials, 250kg of 4-nitro-2-aminophenol-6-sulfonic acid and sodium nitrite in hydrochloric acid excess Reaction at 10°C under certain conditions for 1 hour to generate 1,2diazooxybenzene-4-nitro-6-sulfonic acid and sodium chloride, and then react with 210kg of acetoacetaniline at 65°C under alkaline conditions Azo compound A and water are generated after 2 hours;

[0028] Chromating reaction step: add the azo compound A obtained in the above steps into the reaction kettle, then add water, 350kg chromium sulfate and 90kg sodium bicarbonate, control the temperature at 95°C, and react for 10 hours to form a complex with sodium sulfonate compound and sulf...

Embodiment 3

[0032] The production process of solvent yellow GR comprises the following process steps: a coupling reaction step, a chromization reaction step, a neutralization reaction step and an acid precipitation reaction step,

[0033] Coupling reaction steps: with 4-nitro-2-aminophenol-6-sulfonic acid and acetoacetaniline as basic raw materials, 280kg of 4-nitro-2-aminophenol-6-sulfonic acid and sodium nitrite in hydrochloric acid excess Under certain conditions, react at 20°C for 1.5 hours to generate 1,2diazooxybenzene-4-nitro-6-sulfonic acid and sodium chloride, and then react with 240kg of acetoacetaniline at 80°C under alkaline conditions Azo compound A and water are generated after 3 hours;

[0034] Chromation reaction step: add the azo compound A obtained in the above steps into the reaction kettle, then add water, 500kg chromium nitrate and 70kg sodium hydroxide, control the temperature at 100°C, and react for 15 hours to form a complex with sodium sulfonate compound and nitr...

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Abstract

The invention discloses a process for producing solvent yellow GR. The process is characterized by comprising a coupling reaction step, a complexation reaction step, a neutralization reaction step and an acid precipitation reaction step, wherein the coupling reaction step comprises the following substeps of diazotizing 4-nitro-2-aminophenol-6-sulfonic acid, and then, reacting the diazotized 4-nitro-2-aminophenol-6-sulfonic acid with acetoacetate aniline for 1-3 hours at the temperature of 50-80 DEG C under an alkaline condition, so as to produce azo A and water; the complexation reaction step comprises the following substeps of adding the azo A, obtained in the coupling reaction step, into a reaction kettle, adding water, a complexation agent and a PH regulator, controlling the temperature to 90-100 DEG C, and reacting for 5-15 hours, so as to produce a sodium sulfonate containing complex and an acidic compound; and the acid precipitation reaction step comprises the following substeps of reacting the sodium sulfonate containing complex, obtained in the complexation reaction step, with sulfuric acid for 1-5 hours at the temperature of 80-95 DEG C, so as to produce a sulfonic group containing complex and sodium sulfate, and then, filtering and washing, thereby obtaining the solvent yellow GR. The process has the advantages that the production of acetic acid during complexation reaction is avoided and the process steps are simple and friendly to the environment.

Description

technical field [0001] The invention relates to a production process of solvent yellow GR, which belongs to the field of chemical industry. Background technique [0002] Solvent Yellow GR, English name Solvent Yellow GR, index number: Solvent Yellow 19, is characterized by good solubility in organic solvents, bright colors, and is a high-grade colorant. Uses: wood dyeing, coloring of various natural and synthetic leathers, and coloring of various metal transparent coatings, solvent-based inks, aluminum foil, vacuum plating and bronzing materials. Its structural formula is: [0003] The preparation process of chromium fluoride is complicated. The product of chromium reaction contains a large amount of hydrofluoric acid, which is severely corroded. A large amount of sodium acetate is added to the chromium reaction. The COD in the wastewater is very high, which increases the cost of wastewater treatment. [0004] Therefore, in order to solve the above problems, a new techni...

Claims

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Application Information

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IPC IPC(8): C09B45/16
Inventor 赵觉新徐立群任爱芬
Owner 南通市争妍新材料科技有限公司
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