High-efficiency extraction agent and method for extracting H acid waste liquid

Abstract

The invention relates to a high-efficiency extraction agent for extracting H acid waste liquid, which is prepared from the following raw materials in parts by weight: 2-5 parts of complexing agent, 4-10 parts of diluting agent and 0.5-1.5 parts of chaotropic agent, wherein the mixing temperature of the complexing agent, the diluting agent and the chaotropic agent is 25-60 DEG C. The extraction ratio and the back extraction ratio reach more than 99%, and the extraction agent can be recycled. After extraction, the sewage is clear and transparent and can be used as bottom water, dilution water and washing water in production, thereby achieving the purpose of zero discharge of the sewage. The extraction agent has high efficiency and universality in the aspect of extracting mother liquor of H acid products.

Description

Technical field: [0001] The invention belongs to a chemical product, in particular to a high-efficiency extractant and an extraction method for extracting H-acid waste liquid. Background technique: [0002] H acid is one of the important products of naphthalene dye intermediates, and the annual demand in the world is considerable. However, due to the long production process of H acid, the final product mother liquor contains high-concentration intermediate components, which is one of the most polluted products. Its wastewater has high COD, high chroma, strong acidity and is difficult to biodegrade. Therefore, countries all over the world are seeking solutions to their pollution problems. my country is a big producer of H acid. The export volume of H acid products is very large every year, and the domestic demand is also very large. In order to solve the problems of environmental protection and enterprise survival, some domestic research institutions and some large enterpris...

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Problems solved by technology

However, due to the long production process of H acid, the final product mother liquor contains high-concentration intermediate components, which is one of the most polluted products. Its wastewater has high COD, high chroma, strong acidity and is difficult to biodegrade. Therefore, countries all over the world are looking for solutions to their pollution problems

my country is a big producer of H acid. The export volume of H acid products is very large every year, and the domestic demand is also very large. In order to solve the problems of environmental protection and enterprise survival, some domestic research institutions and some large enterprises are developing and seeking to solve the pollution of H acid Method, in the 1980s, there was a useful extraction method for H acid to extract organic matter from its product waste liquid, but it was reported that the extraction rate was not high and the effect was poor

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