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Method for preparing diazo compound

A technology of disazo compounds and compounds, which is applied in the field of preparation of disazo compounds, can solve the problems of low production efficiency and yield, and achieve the effects of high production efficiency, simple preparation method and high yield

Inactive Publication Date: 2017-12-15
肖慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a preparation method of disazo compounds to overcome the technical problems of low production efficiency and yield in the preparation methods of disazo compounds in the prior art

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  • Method for preparing diazo compound

Examples

Experimental program
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Embodiment 1

[0051] 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 3 mol of hydrochloric acid.

[0052] 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.

[0053] C, 0.5mol of 3-methoxyphenol is dissolved in the aqueous solution of sodium hydroxide in the ice-water bath, obtains phenate solution; Wherein, the mass concentration of the aqueous solution of sodium hydroxide is the aqueous solution of 7%, the sodium hydroxide The aqueous solution includes 2 mol of sodium hydroxide.

[0054] d. After dripping the above-mentioned diazonium salt solution into the phenoxide solution at a speed of 3 dr...

Embodiment 2

[0062] a. Dissolve 1 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 2 mol of hydrochloric acid.

[0063] 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 1.5 mol of sodium nitrite.

[0064] C, 0.5mol of 3-methoxyphenol is dissolved in the aqueous solution of sodium hydroxide in the ice-water bath, obtains phenate solution; Wherein, the mass concentration of the aqueous solution of sodium hydroxide is the aqueous solution of 5%, the sodium hydroxide The aqueous solution includes 3 mol of sodium hydroxide.

[0065] D, the above-mentioned diazonium salt solution is dripped into the phenoxide solution with...

Embodiment 3

[0070] 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 5 mol of hydrochloric acid.

[0071] 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 3 mol of sodium nitrite.

[0072] c, 1.5mol of 3-methoxy-phenol 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 sodium hydroxide The aqueous solution includes 5 mol of sodium hydroxide.

[0073] D, after the above-mentioned diazonium salt solution is dripped in the phenoxide solution wit...

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Abstract

The invention provides a method for preparing a diazo compound. The method for preparing the diazo compound comprises the following steps: dissolving a mono phenylamine compound into a strong acid solution so as to obtain an amine solution; putting a sodium nitrite solution into the amine solution so as to obtain a diazonium salt solution; dissolving a phenol compound into a strong alkali solution so as to obtain a phenoxide solution, wherein an ortho-position of hydroxyl of the phenol compound has no substituent group; and dissolving the diazonium salt solution into the phenoxide solution, thereby obtaining a solution with the diazo compound. The preparation method of the diazo compound, which is provided by the invention, is high in production efficiency, high in yield and low in production cost.

Description

technical field [0001] The invention relates to organic synthesis technology, in particular to a preparation method of disazo compounds. 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, disazo, 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, pho...

Claims

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Application Information

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IPC IPC(8): C07C245/08C07C245/20C07C209/00C07C211/46C07C213/08C07C217/84C07C211/52C07C41/26C07C43/23C07C37/66C07C39/235C07C39/08
Inventor 肖慧
Owner 肖慧