Back to square one....Thank you Ucore for confirming what many of us have been saying for many months now.
1) that you are heading back to bench scale lab work to find and optimize a Sovent Extraction Flowsheet!
2) that you will then proceed to a pilot scale
3) that you will indeed proceed to a Feasibility Study after defining an acceptable Flowsheet
4) that a plant cannot be designed and/or built.....until all of the above has been successfully completed
The above is a 2 to 3 process if all goes well.