Not possible you might be able to make a slightly more and slightly les cbd fraction
I a mid mains swap but the diffrance won t be a lot 10% more from one or the other
If your just planning on using 5% AC on your 1:1 cbd:d9 it will likely make it almost all d8 with maybe a little d9.
An acid could work to go for 1:1 d9:d8 if you did it anhydrous and under inert atmosphere.
It’s going to be tricky though with a 1:1 cbd:d9 distillate as starting material. You’d probably need to keep taking samples with in-house testing to know when you hit the ratio you want.
Maybe try this sop I posted a while back, just run it for half the time and you’d have a good chance of hitting 1:1 d9:d8 since your staring out with a 1:1 cbd:d9
You will not achieve 95% D8+D9 unless the distillate is at least 95% THC(s)+CBD to start… and you have zero yield loss to byproducts. That should be obvious. The maximum you can get out is what you put in.
I haven’t seen separation of any THC (D8 or D9) from CBD by distillation, except the different ratios of them in the beginning versus the end. Essentially, CBD distills slightly faster than THC because of CBD’s lower viscosity than THC, so the first bit will have higher CBD in ratio to the THC, until the ratio of THC in the distilland exceeds the point where that can occur. If the CBD starts at a low percentage, then perhaps only first few milliliters would have higher CBD… but it’s always a mixed distillate from a mixed distilland, unless you do something to rectify the vapor phase better than a normal short path. Under normal circumstances, the boiling points of two compounds at the given pressure in a distillation must differ by at least 20°C, and they must exhibit zero azeotropic behavior with one another to achieve good separation.