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Method for preparing tris-azo compound

A compound, trisazo technology, applied in the field of preparation of trisazo compounds, can solve the problems of low production efficiency and yield, and achieve the effects of high production efficiency, simple method and easy realization

Inactive Publication Date: 2018-01-12
肖慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a preparation method of a trisazo compound to overcome the technical problems of low production efficiency and yield in the preparation method of a trisazo compound in the prior art

Method used

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  • Method for preparing tris-azo compound
  • Method for preparing tris-azo compound
  • Method for preparing tris-azo compound

Examples

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Embodiment 1

[0049] a. Dissolve 0.5 mol of aniline in an aqueous hydrochloric acid solution in an ice-water bath to obtain an amine salt solution; wherein the aqueous hydrochloric acid solution has a mass concentration of 5% aqueous solution, and the aqueous hydrochloric acid solution includes 2 mol of hydrochloric acid.

[0050] b. Drop an aqueous solution of sodium nitrite into the above amine salt solution at a rate of 20 drops / s to obtain a diazonium salt solution; wherein, the aqueous solution of sodium nitrite includes 0.5 mol of sodium nitrite.

[0051] c, 0.5mol of 1,3,5-trihydroxyphenol is dissolved in an aqueous solution of sodium hydroxide in an ice-water bath to obtain a phenoxide solution; wherein, the mass concentration of an aqueous solution of sodium hydroxide is a 7% aqueous solution, hydrogen The aqueous solution of sodium oxide includes 2 mol of sodium hydroxide.

[0052] D. After the above-mentioned diazonium salt solution is dripped into the phenoxide solution with a s...

Embodiment 2

[0060] a. Dissolve 4 mol of aniline in an aqueous solution of hydrochloric acid in an ice-water bath to obtain an amine salt solution; wherein the mass concentration of the aqueous solution of hydrochloric acid is 10% aqueous hydrochloric acid, and the aqueous solution of hydrochloric acid includes 5 mol of hydrochloric acid.

[0061] b. Drop an aqueous solution of sodium nitrite into the above-mentioned amine salt solution at a rate of 10 drops / s to obtain a diazonium salt solution; wherein, the aqueous solution of sodium nitrite includes 4 mol of sodium nitrite.

[0062] c, 1.5mol of 1,3,5-trihydroxyphenol is dissolved in an aqueous solution of sodium hydroxide in an ice-water bath to obtain a phenoxide solution; wherein, the mass concentration of an aqueous solution of sodium hydroxide is a 5% aqueous solution, hydrogen The aqueous solution of sodium oxide includes 5 mol of sodium hydroxide.

[0063] D, above-mentioned diazonium salt solution is dripped in the phenoxide sol...

Embodiment 3

[0068] a. Dissolve 3 mol of 4-methoxy-aniline in an aqueous hydrochloric acid solution in an ice-water bath to obtain an amine salt solution; wherein the aqueous hydrochloric acid solution has a mass concentration of 7% aqueous solution, and the aqueous hydrochloric acid solution includes 4 mol of hydrochloric acid.

[0069] b. Drop an aqueous solution of sodium nitrite into the above amine salt solution at a rate of 15 drops / s to obtain a diazonium salt solution; wherein, the aqueous solution of sodium nitrite includes 3 mol of sodium nitrite.

[0070] c, 1mol of 1,3,5-trihydroxyphenol is dissolved in an aqueous solution of sodium hydroxide in an ice-water bath to obtain a phenoxide solution; wherein, the mass concentration of an aqueous solution of sodium hydroxide is a 10% aqueous solution, and the hydrogen oxidized The aqueous solution of sodium includes 4 mol of sodium hydroxide.

[0071] D, above-mentioned diazonium salt solution is dripped in the phenoxide solution with...

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Abstract

The invention provides a method for preparing a tris-azo compound. The method for preparing the tris-azo compound provided by the invention comprises the following steps: dissolving monoanilide compounds in a strong acid aqueous solution so as to obtain an amine salt solution; adding an aqueous solution of sodium nitrite into the amine salt solution so as to obtain a diazonium salt solution; dissolving 1,3,5-trihydroxyphenol into an aqueous solution of strong base so as to obtain a phenoxide solution; adding the diazonium salt solution into the phenoxide solution, thereby obtaining the solution containing the tris-azo compound. The method for preparing the tris-azo compound provided by the invention is high in production efficiency and yield and low in production cost.

Description

technical field [0001] The invention relates to organic synthesis technology, in particular to a preparation method of a trisazo compound. Background technique [0002] An azo compound refers to a compound formed by connecting an azo group -N=N- with two hydrocarbon groups (it can be an aliphatic hydrocarbon group, or an aromatic hydrocarbon group such as phenyl), and the general formula is R-N=N-R'. In 1859, J.P. Gris discovered the first diazo compound and prepared the first azo dye (Azobenzene). Among them, according to the number of azo groups contained in the molecule, it can be divided into monoazo, trisazo, trisazo and polyazo dyes. Azo dyes are the most diverse and widely used synthetic dyes, which can be used for dyeing of fiber, paper, leather, soap, furniture wood, plastic, rubber, color photographic materials, ink and food coloring. Azo compounds can also be used in the following fields: pharmaceutical reagents, acid-base indicators, polymerization initiators, ...

Claims

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Application Information

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IPC IPC(8): C07C245/08
Inventor 肖慧
Owner 肖慧