Methods for removing impurities from benzaldehyde
Thread Content
Hello everyone, our company produces benzaldehyde with a purity of around 99.8%, and it usually contains 0.1% acyl chloride. We have tried washing it with alkaline solutions (as well as heating it under reflux), but the concentration of acyl chloride doesn’t change much in either case. I was wondering if there are any other methods that can be used to deal with this issue. Thank you!
There is a difference in boiling points, which can be removed through distillation. It might be because the purity is already very high at present, so a small amount of reflux doesn’t have any noticeable effect.
The product is the result of distillation; therefore, impurities cannot be removed through distillation
I can try using macroporous adsorbent resins to see if they can absorb this acyl chloride. I’m not entirely sure how significant the differences are in the properties between benzaldehyde and this acyl chloride, but small-scale tests can be conducted. If you need relevant samples, feel free to contact me; they will be provided free of charge. 18969098391@163.com
Isn’t this first acidolysis and then alkalolysis? Doesn’t the acyl chloride turn into a salt during alkalolysis?