SWIM said he has pulled 5 times from one gallon before he considered the mimosa 'wine' exhausted. Have you freeze precipitated what you have so far? Do it, and re-use the decanted solvent - no need to buy more. 700 ml is a very large pull - he shoots for ~150 ml each time, combines, freezes - no evaporation/reduction of volume step - unnecessary, as long as the freezer is COLD and he is patient. Once he left ~ a liter of previously FPed yellow naphtha in for a week and ended up with a few beautiful bonus crystals - precip/crystallization can take time.
Factors which may matter: Warm naphtha may pull more, wider spectrum - some of what he pulled was ~orange earwax type spice... most was canary yellow. Sufficient time for the layers to separate is key. Others don't like it, but he has no problem with emulsions and shakes the jugs vigorously - just make sure pH is 13+. Toluene, and especially xylene, are stinky stinky stinky and you cannot FP. You either have to evaporate or salt out. Ventilation is essential for health and safety.
Hope this helps,
Best of travels,
L