loneswinger wrote:I read through this a couple of times and am still not clear on the modification. So you added to the straight section of column a second reflux condenser? So the upgoing vapor is split between the offset head and another path that just returns it as reflux? You are still returning some of the refluxing liquid from the offset head by controlling the liquid you take off right? Which is taller, the condenser in the offset head, or the new condenser that you added? I am just trying to visualize what this looks like.
loneswinger wrote:Ok yeah. I really don't know why this improved your purity, or moreover, why you were not getting high purity before. The only reasons I can come up with are that the new column is returning hot reflux, whereas with the old way it was returning cold reflux and some how upsetting equilibrium. The other thing I just thought of was after reading a post earlier today, it sounds like the 1/4" tubing for a liquid reflux return line may not be big enough to cope with the amount of reflux being created. So that liquid reservoir at the bottom of the offset head might have been overflowing with liquid before and not returning the liquid properly to the top of the column.
When you ran it before with both the output line and the return line wide open did anything come out the output? It shouldn't from what I have heard. (I don't run a LM, I run VM, so I am just speaking from what I have read)
stillton wrote:thats sounds like reversed LM (RLM) Loneswinger.
no need for two reflux condensers for that to work
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