I am looking for alkali stable radical scavengers.
I have a glycol solution of 80:20 ethyl diglycol:butyl glycol.
And want to add 10% KOH (so a waterless alkaline).
I have tried spiking the glycol solution with up to 2% BHT (butylated hydroxy toluene) before adding the KOH. As BHT is commonly used as antioxidant (radical scavenger)
However, it still seems unstable.
I was wondering if there are any Alkali stable radical scavengers or anything to supress discoloration and further (aldol) condensation of the present glycols.
A couple of quick comments.
The concept of pH is hypothetically applicable for your solvent, but it would very difficult to apply it practically. If you add a very strong base such as KOH to your solvent, it will react with weak acids (glycols) and form water as a product. You will not have water free solution
https://www.nature.com/articles/srep01865?proof=t%29.
https://doi.org/10.3390/molecules26227000
https://www.koreascience.or.kr/article/JAKO200828955288443.pdf
https://doi.org/10.1155/2013/496586
Good luck.
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