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Application method of Cu2O in synthesis reactions between bromaminic acid and aromatic amines

A technology of synthesis reaction and application method, applied in the direction of chemical instruments and methods, chemical/physical process, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of excessive copper catalyst consumption, environmental pollution, high heavy metal content in filter residue, etc. problem, to achieve the effect of small amount of catalyst, good catalytic effect and long active time

Inactive Publication Date: 2018-12-18
杭州下沙恒升化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of catalytic reaction is that the amount of copper catalyst is too much, a large amount of metal reducing agent and copper cause the heavy metal content in the filter residue to be too high, causing environmental pollution

Method used

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  • Application method of Cu2O in synthesis reactions between bromaminic acid and aromatic amines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 500ml reaction flask, add 280g of water, 46g of bromic acid (concentration 90%), 18.8g of aniline, heat up to 70-85°C, then add a catalyst (catalyst is 10g of water plus 0.6g of copper sulfate to fully dissolve, add 10g of liquid caustic soda, add 0.4g of glucose to react), add appropriate amount of baking soda to control pH=7.0-8.5, add 0.6-1g of glucose in the middle, keep warm for 2-3 hours to the end.

Embodiment 2

[0024] In a 500ml reaction bottle, add 200g water, 60g alcohol, 46g bromic acid (concentration 90%), 23.5g mesitidine, heat up to 70-85°C, then add catalyst (catalyst is 10g water plus 0.6g copper sulfate to make Completely dissolve, add 10g liquid caustic soda, add 0.4g glucose to react), add appropriate amount of baking soda to control pH = 7.0-8.5, add glucose meter 0.6-1g in the middle, keep warm for 2-3 hours to the end.

Embodiment 3

[0026] In a 500ml reaction bottle, add 300g of water, 46g of bromic acid (concentration 90%), 18.5g of p-aminoacetanilide, heat up to 70-85°C, and then add a catalyst (the catalyst is 10g of water plus 0.6g of copper sulfate to make Complete dissolution, add 10g liquid caustic soda, add 0.4g glucose to react), add appropriate amount of soda ash and baking soda to control pH = 7.0-8.5, add 0.6-1g of glucose in the middle, keep warm at 75-90°C for 2 hours to the end.

[0027] From embodiment 1-embodiment 3, after reaction, obtain following effect data:

[0028] Example

Molar ratio of bromic acid to Cu ions

Glucose supplement

Reaction time

Reaction purity

Conversion rate

Example 1

1：0.034

repeatedly

2~3 hours

96.945％

about 92%

Example 2

1:0.034

repeatedly

2~3 hours

93.24％

around 89%

Example 3

1:0.034

repeatedly

2~3 hours

84.998％

about 93%

[0029] Through above-mentioned em...

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PUM

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Abstract

The invention discloses an application method of Cu2O in synthesis reactions between bromaminic acid and aromatic amines. Cu2O is taken as a catalyst of catalytic synthesis reactions between bromaminic acid and aromatic amines and is used to catalyze the synthesis reactions between bromaminic acid and aromatic amines. Cu2O is prepared by subjecting the product of reactions among copper sulfate, cane sugar (or glucose), and sodium hydroxide to suction filtration, wherein the mass ratio of copper sulfate: cane sugar (or glucose): sodium hydroxide is 0.6:0.4:10. The application method comprises following steps: adding bromaminic acid and aromatic amines into water, wherein the mass ratio of bromaminic acid to aromatic amines is 1.9-2.5:1; heating the water to a temperature of 70 to 90 DEG C;adding Cu2O, adding an acid-binding agent to adjust the pH, adding a proper amount of glucose, and carrying out reactions for 2 to 3 hours at a constant temperature. An ideal catalytic effect is realized by using a small amount of catalyst, and the heavy metal pollution is light.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis methods, in particular to a Cu 2 The application method of O in the synthetic reaction of bromoacid and aromatic amines. Background technique [0002] The aryl amination reaction of bromoacid is widely used in the dye industry, especially in the synthesis of anthraquinone dyes. In addition to azo dyes, anthraquinone dyes are the most used dyes, mainly because anthraquinone dyes not only dye bright colors but also have excellent light fastness. Among them, anthraquinone acid dyes are widely used, mostly for dyeing nylon, wool and silk. It has good color matching performance, high color dyeing rate, short dyeing time and high reappearance rate. Anthraquinone-type live blue dyes are important dyes used in the printing and dyeing of natural and synthetic fiber textiles, and have good perspiration, light and washing fastness. [0003] The aryl amination reaction of bromoacid is used in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72C07C303/22C07C303/32C07C309/53
CPCB01J23/72C07C303/22C07C303/32C07C2603/24C07C309/53
Inventor 王彦伟司秀红
Owner 杭州下沙恒升化工有限公司