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A method of recycling neighbor aminozylene acid from neighboring aminopenzoate wastewater

A technology of methyl aminobenzoate and anthranilic acid, which is applied in the field of recycling anthranilic acid, can solve the problems of unfavorable wastewater post-treatment and secondary pollution, reduce the addition and purification process, reduce the content of toxic organic substances, and avoid The effect of secondary pollution

Active Publication Date: 2016-04-13
BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can extract anthranilic acid, it causes secondary pollution due to the introduction of heavy metal copper ions into the water, which is not conducive to the post-treatment of wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]This embodiment provides a specific method for reclaiming anthranilic acid from methyl anthranilate wastewater, the method is to carry out separation treatment and extraction treatment to methyl anthranilate wastewater, and then obtain sodium anthranilate Solution, after purification treatment, anthranilic acid is obtained; wherein, the purification treatment is decolorization, acid precipitation, pyrolysis, re-decolorization, precipitation separation and suction filtration to remove water from the sodium anthranilic acid solution obtained by separation and extraction , to finally obtain anthranilic acid.

[0043] Described method specifically comprises the following steps:

[0044] (1) Put 300L tributyl phosphate and 700L aviation kerosene into the mixing tank, and mix well to get 1000L extractant. Put 10000L of methyl anthranilate wastewater into the extraction reactor, open the reactor, add 80L of 30% industrial hydrochloric acid to the wastewater, and the pH of the ...

Embodiment 2

[0050] This embodiment provides a specific method for reclaiming anthranilic acid from methyl anthranilate wastewater, the method is to carry out separation treatment and extraction treatment to methyl anthranilate wastewater, and then obtain sodium anthranilate Solution, after purification treatment, anthranilic acid is obtained; wherein, the purification treatment is decolorization, acid precipitation, pyrolysis, re-decolorization, precipitation separation and suction filtration to remove water from the sodium anthranilic acid solution obtained by separation and extraction , to finally obtain anthranilic acid.

[0051] Described method specifically comprises the following steps:

[0052] (1) Put 300L tributyl phosphate and 700L aviation kerosene into the mixing tank, and mix well to get 1000L extractant. Put 10000L of methyl anthranilate wastewater into the extraction reactor, open the reactor, add 82L of 30% industrial hydrochloric acid to the wastewater, and the pH of the...

Embodiment 3

[0058] This embodiment provides a specific method for reclaiming anthranilic acid from methyl anthranilate wastewater, the method is to carry out separation treatment and extraction treatment to methyl anthranilate wastewater, and then obtain sodium anthranilate Solution, after purification treatment, anthranilic acid is obtained; wherein, the purification treatment is decolorization, acid precipitation, pyrolysis, re-decolorization, precipitation separation and suction filtration to remove water from the sodium anthranilic acid solution obtained by separation and extraction , to finally obtain anthranilic acid.

[0059] Described method specifically comprises the following steps:

[0060] (1) Put 10000L of methyl anthranilate wastewater into the extraction reactor, open the reactor, add 79L of 30% industrial hydrochloric acid to the wastewater, and the pH of the wastewater is at 4.0. 1000L of recovered extractant was added to the waste water, the extraction reaction was stop...

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PUM

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Abstract

The invention provides a method for reclaiming anthranilic acid from methyl anthranilate wastewater, the method is to carry out separation treatment and extraction treatment to methyl anthranilate wastewater, then obtain sodium anthranilate solution, and then Anthranilic acid was obtained after purification. In the present invention, the property that anthranilic acid is soluble in hot water and slightly soluble in cold water is used for purification, which reduces the addition of other substances and the purification process, reduces the cost of purification, and is economical and environmentally friendly.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for recovering anthranilic acid from methyl anthranilate wastewater. Background technique [0002] Methyl anthranilate, chemical formula C 8 h 9 NO 2 , is a colorless crystal or light yellow liquid, long-term exposure to light changes color, can evaporate with water vapor, soluble in ethanol and ether, its ethanol solution has blue fluorescence, soluble in most non-volatile oils and propylene glycol, slightly soluble in Mineral oil, slightly soluble in water, insoluble in glycerin. [0003] Methyl anthranilate can be used as an intermediate for dyes, medicines, pesticides, and spices. In terms of dyes, it is used in the manufacture of azo dyes, anthraquinone dyes, and indigo dyes. For example, Disperse Yellow GC, Disperse Yellow 5G, Disperse Orange GG, Active Brown K-B3Y, Neutral Blue BNL. In medicine, it is used in the manufacture of antiarrhythmic drugs changroli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C227/40C07C229/56
CPCC07C227/40
Inventor 欧云川赵静殊
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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