This is room temp iso extract on the left, ending in a Heptane solution on the right.
The THCa was partitioned several times, but the most effective separation was after the initial Heptane extraction from the iso. The THCa was then extracted from the Heptane with pH 14 saline. Heptane discarded, then the THCa crashed out of the saline with pH 2 saline. THCa then recovered with fresh Heptane.
This pH swung saline separation was extremely effective.
As for salt remaining in the extract, while in a nonpolar solvent, be sure to fully extract residual salt with your polar solvent. H20 being the cheapest option