I am facing issues in binder recovery from RAP using Solvent Extraction Apparatus. Is there any issue with my method of recovery?

I did it in this way;

First I heated 1 kg sample of RAP for 1 hour in oven 110+/- 5 oC, then I put it in the bowl of centrifuge apparatus and filled the bowl with CTC (carbon tetra chloride), covered it with filter paper, closed it and left it for on hour. After that I run centrifuge apparatus and collected the solution(which consists of RAP binder + filler + CTC). I kept this solution for 4 days so that filler gets settle down. After 4 days, i poured the solution (rap binder + CTC) into Solvent extraction apparatus and recovered binder in this way. I put this recovered sample in oven for 30 minutes by maintaining 100 oC Temperature. After that, I cooled it down to room temperature, then I took some bitumen from it and tested for Penetration. The results were not satisfactory. The penetration of the Recovered RAP binder is "66" which is not possible bcz the virgin binder was 60/70, which was used in the construction of road.

Need Guidance in this regard?? Thanks for your Time