Hello everyone, thanks in advance for reading and any help is much appreciated! Im encountering some issues with my recovery times and getting all solvent out of material column in a reasonable time. So I’ll explain the process:
100lb solvent tank
3- 6x48 sleeved material columns
Jacketed collection pot
I have open sleeve material columns. I fill the sleeve w dry ice and alcohol n pull a vacuum. Then send 70/30 mix from solvent tank, thru a coil that’s in dry ice and alcohol, Into the material column to soak. I’ll leave the solvent to soak the material for 1-1.5 hr . Then dump to collection pot. I’ll then open recovery on collection pot and the recovery on solvent tank, n turn on pump. There is also coil condenser submerged in dry ice n alcohol between pump n solvent tank. So now I’m coming to the issues… it will dump probably about 75% of the Solvent from the material column, then it basically stops. Because the sleeve is so cold, the solvent doesn’t want to come out I’m guessing. And I read about the nitrogen vapor push, but don’t fully understand how to do it properly… So basically I have to wait all day for the column to warm back up and then dump into a different collection pot for a second b grade collection.
Then when recovering, I have a fully jacketed collection pot, n send warm water around it. But the water instantly gets so cold. Idk if my water heater is just a pos or if I need more heaters. Is there one that someone can recommend or the proper way to do it? So basically the recovery is going very slow. I also have a fully jacket solvent tank and the coil down the center, but don’t use them because I don’t have a chiller. Any recommendations on one or the property way to set it up?
And then another issue is when I set up another material column (have a 3 rack set up) and soak it as dump, when I dump, nothing comes out. And I assume this is because the material column is so cold and the collection pot is warm from recovery, so there is a vapor lock?
So basically it takes me all day to run all three columns, when I know there is a way to speed this up. Can anyone help point me in the right direction to getting this system moving better? Thanks!