Zein

[pintoshine]

I found out an interesting but related fact. Zein, which is a protein in corn and other grains, is only soluble in dilute solutions of alcohol and water. There is a temperature/concentration relation that says the higher the alcohol content the higher temperature it takes the disolve the zein.
The foam that builds on grain mashes can flood a column and condenser really fast and is mostly this zein. I have also found that the zein comes out of suspension only at colder temperatures < 20C in 50% abv.
I have been looking at this cloudiness for years. It usually filters out really easy if you chill your stuff to 10C.
There is one exception to this and it is when you use acrylic or vinyl tubing. The vinyl (fish tank tubing and all its relatives) disolves and you can't get that type of cloudinees out for anything.



I am sure you will find more information on this if you Use the search function ain't that right tater?
LMAO.