Remove the discolorations that affect whiteness
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When 3,4-dichloroaniline is dissolved in toluene, a \"brown\" mixture is formed. It is understood that aniline produced through the modified production process of 3,4-dichloroaniline (hydrogenation reduction method) is prone to oxidation in air, which causes the mixture obtained by dissolving 3,4-dichloroaniline in toluene to appear brown, thereby affecting the whiteness of downstream products. Which expert can suggest a way to remove the “brown color” from the mixture? Thank you!
I’m not from this industry, so I can only guess: perhaps it’s possible to prevent contact with air and add antioxidants.
Thank you! This raw material is packaged in ordinary plastic bags! It’s inevitable to come into contact with air during use! Thank you!
As a casual suggestion: could we avoid using ordinary plastic bags? For example, we could use those with inner pockets, or adjust the specifications of the plastic bags so that they can be used up once they’re opened. :)