I am at a loss for this one, was hoping someone in the community might have some insight.
A friend of mine ran some sugary crude through their distillation unit despite my warning. As expected it caked up their unit to which I recommended water and alconox flushes until it comes out clean. 20 or so flushes later and still having problems. Even with main body at 200C and internal condenser at 70C they have trouble making distillate (vac = 50mtorr). We have verified all the gauges are reading correctly. Our only thought is that there is so much caked on sugar preventing heat transfer.
Any recommendations for solvents that might work to clean the unit? Maybe distilled vinegar?
We were recommended and had success with a caustic cleaning solution used in the brewing industry. We did a wash with that, then 2-3 washes with distilled water, then a wash with ethanol. Cleared things up pretty well on our system. Only warning is if you do this too often you will need to repassivate your stainless more often.
Yeah we were hoping to avoid heavy duty acids and bases but don’t really see many other options at this point. It doesn’t really matter how long the unit lasts if it doesn’t distill anything!
It’s not too big a deal honestly. The acid and base wash solution is usually reusable 10+ times. The lye for the base wash is dirt cheap and phosphoric is pretty inexpensive too