Cold Ethanol Crude to Shatter - black stuff crashing out. Any ideas what it is - how to prevent?

[cyclopath]

nah, you should donate $10 to charity and do some reading based on that search query I gave you

chances are changing the way you make your bed is the key.

and/or add one of these after your powders and before your rotovap

Tricks of the trade

Po-man’s depth filter: 0.5-5micron polyfelt (or ptfe) filter sheet from dudadiesel 1.5-3" OD TC spool (OD and length chosen depending on how big a filter you need, ive never had to go more than 12" long) filterplate endcaps (sintered is not required) – cut sheet to the “depth” you want the filter to be, roll the sheet up, very tight, to the point where it will when stuffed into the spool and “unwindes” it is very tight. (if it can slide out via gravity, its way too loose) Now cap both ends …