Sulfuric acid decolorant

Abstract

A sulfuric acid decolorant comprises 50-60wt% of anhydrous ethanol, 15-25wt% of diatomite, 15-25wt% of active carbon, and 1-5wt% of free acid 3-acetylmercapto-2-methylpropiono-L-proline. The sulfuric acid decolorant which utilizes diatomite and active carbon to realize a dual adsorption function adsorbs pigments free in sulfuric acid, allows contained pigments to disappear, and can acidify diatomite and reduce the side reactions of dilute sulfuric acid through the addition of free acid 3-acetylmercapto-2-methylpropiono-L-proline, The sulfuric acid decolorant can rapidly and effectively remove the color of sulfuric acid and has a low cost.

Description

technical field [0001] The invention relates to a decolorizing agent, in particular to a sulfuric acid decolorizing agent. Background technique [0002] Pure sulfuric acid is generally a colorless and transparent liquid, but when it contains impurities or the container is not clean, the sulfuric acid will turn yellow after a period of storage. If the sulfuric acid cannot be decolorized, the value of the yellowed sulfuric acid will drop significantly, and its use will be limited. [0003] In many production processes, the utilization rate of sulfuric acid is very low, and a large amount of sulfuric acid is discharged along with acid-containing wastewater. If the waste water is not recycled and discharged into nature, it will not only acidify the water body or soil, cause harm to the ecological environment, but also waste a lot of resources. However, during the recycling process, sulfuric acid is difficult to decolorize, and the decolorization process will also cause environm...

AI Technical Summary

Problems solved by technology

If the waste water is not recycled and discharged into nature, it will not only acidify the water body or soil, cause harm to the ecological environment, but also waste a lot of resources

However, during the recycling process, sulfuric acid is difficult to decolorize, and the decolorization process will also cause environmental pollution

[0004] CN102786036A discloses a method of using potassium permanganate to decolorize sulfuric acid. The purple potassium permanganate solution is passed into brown or dark brown sulfuric acid, and the sulfuric acid is decolorized under the oxidation of potassium permanganate. However, the potassium permanganate solution itself is purple, and it is difficult to control the input amount of the potassium permanganate solution in the reaction. If the excessive potassium permanganate solution is introduced, the sulfuric acid will show the purple color of potassium permanganate. Clear sulfuric acid is still hard to come by

However, hydrogen peroxide solution has strong oxidizing properties, and high-concentration hydrogen peroxide solution and steam are highly irritating and corrosive to the human body, and will cause certain damage to human tissue after contact

It is easy to cause danger when operating