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Devac  ·  2395 days ago  ·  link  ·    ·  parent  ·  post: Pubski: October 4, 2017

    Caustic soda

Or lye as I think it's also called. Yeah, I used it as well. I'm now intrigued about the used oil you mentioned. I guess that if there's no acrolein there would be nothing wrong with it. Otherwise, it might start to polymerise in the presence of a strong base (like caustic soda) and ruin the product.

I'll give it a try sometime.