Reasons for the discoloration of liquid maleic anhydride

2010-12-10View Original

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This post was last edited by WSL01218 on 2010-12-29 09:17. Liquid maleic anhydride tends to change color when stored. May I ask everyone, what is the reason for the color change? Thank you very much

Reply #22010-12-28

The reason for the color change is water absorption and polymerization. One way to slow down discoloration is to keep the temperature of the liquid anhydride as low as possible, of course above its freezing point. Increasing the yield of the fractions before and after distillation also helps to improve purity.

Reply #32010-12-29

Reply to 2# fht98431007: Thank you for your help. If you have time, could you explain in detail the reasons for the discoloration of maleic anhydride?

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Reasons for the discoloration of liquid maleic anhydride

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