This was done in a way you’re saying can’t be done. Randy is correct. You probably got discoloration because when trying to filter the fats you got filter medium through.
Ok i see why youre arguing for your proposed method. Changing temperature takes time yes? You propose to take all solvent low. Then rinse then recover taking temps high. Then to do it again you have to wait for temps to get low. One of the key advantages to multi stage systems is they can be run concurrently and independently. I only need to wait for the temp to swing partially to begin any step in the process while you need to wait for the full swing and while you wait what concurrent process do you run? You say youre going to go to hydrocarbon. Im already there. I assure you waiting is very expensive and before you say ill just buy more equip/solvent/space/time/whatever remember that comes off your bottom line.
Btw i had this same debate with future years ago on ig and guess whos now looking at multi step hydrocarbon primary process lol
Let me back up and say im not attacking you. I hope you succeed. But since youre in the planning stage you havent had the opportunity to learn from execution. Take it from someone with a $2k weekly dry ice bill dT isnt always the most cost effective solution.