I’ve been wondering something for a minute now. I’ve spoken to several associates and they’ve said they’ve pondered on it too but never pulled the trigger. Maybe one of y’all has actually tried this or can offer some insight based on experience.
I have some dark distillate that I would like to make gold gold. It’s actually sitting at 90% but it’s dark af for whatever reason. I was not the one to make it but I had it tested and was pleased.
I was thinking to melt it down and do a hot run on the CLS. That way we could run it through CRC and purge most butane before dumping and then finish off full purge in the roto or maybe a reactor.
The issues that I can think of is
A) the butane not fully dissolving the disty and clogging up things downstream
B) butane hitting hot disty and evaporating pretty much right away, hence not dissolving.
Both of these problems could be relieved if heptane were used of course, but then we would have to do another distillation to ensure all of that is purging where as butane can be fully purged without, due to its much lower evap point.
I’m thinking to simply dump the tane and leave it to fully dissolve disty overnight before running through CRC or reclaiming.
Besides the color, what are you trying to get out of the distillate? Is it super dark, like tea? ***edit. saw dark af. ***I have some distillate that tests well and is a little dark. Some material just doesn’t clean up the same and requires a second or third pass for me too.
We have a customer that doesn’t want the honey gold and buys (minimal) distillate that has a little bit more color to it. I have no idea why, and haven’t asked, but it saves me a second or third pass which is ok with me.
I’ve did this several times and will be doing it again soon… The idea is don’t scrub to much or you’ll be water clear and it’ll get color like red or purple from oxidation
Close the valves add some nitrogen and it’ll hold the butane down from bubbling a way but let u get it melted at same time…but tbh the bubbling probably helps dissolve the disty
I heated my disty then poured into an empty tank…then filled w butane and put in hot water and waiting a few hrs
You can still put heptane in your cls, just have to use ptfe gaskets. I don’t have a standard chromotography columns for cleaning crude, so I do it like this. Granted assuming can backfire, but if he’s going to redistill it. I can assume he may possibly have a roto, as well.
But you’re correct, he didn’t say anything about additional steps afterwards.
I’ve never had proper chromatography columns, and that hasn’t stopped me from polishing crude. Spools and filter plates work just fine. Buchner or hochstrom filters work great for this, too. Granted, this was all being done with ethanol, but the trick is not hard to perform. T5 and AC for the win.
Ethanol is easier to recover than heptane (higher bp), and one need not use butane to push. Gravity, nitrogen push, or vacuum are all sufficient with the methodology I explained up thread.
Boiling point of ethanol is 173.1F vs heptane at 209.2F. While you may very well be right, it’s my experience that unless one is using membranes, lower BP solvents are easier to recover.
You really don’t like ethanol. Almost like you have something against it. Did the booze hurt you like it did to me?