Purification of semiconducting single-walled carbon nanotubes by spiral counter-current chromatography.

•Separation of single-walled carbon nanotubes using spiral CCC with the polymer phase solvent system.•Extraction methods for separation of chiral types of carbon nanotubes can be adapted to counter-current chromatography.•Separation of large molecules using the ATPS is accomplished in the specialized mixer-settler spiral disk rotor.•Semiconductor measurements of separated chiral types of carbon nanotubes discovery.