Sodium carbonate is not very strong base, so your yield might be small.. Also, when you add it to your acacia solution, it will bubble up from CO2, so be sure to add slowly if you do. Also the problem is that it tends to create a lot of emulsions.
One thing you could try doing is, after filtering your acacia solution, reduce it down to a goo, and then do a dry tek on that by mixing with sodium carbonate to make a paste, mix well, then dry and pull with your solvent. If you can find calcium hydroxide, its a stronger base for dry teks, but otherwise you can try with sodium carb. This would prevent the emulsion problems, the sodium carb would be much more concentrated and probably basing better, and with warm naphtha, its possible the yield would be decent.
Whatever way you go, just dont throw anything away, because if yields are not as desired, you can always later use a stronger solvent and/or add a stronger base or similar.
Let us know how it works out for you