A method for separating single-wall carbon nanotubes from an aqueous
slurry comprises adding a water-immiscible organic solvent to an aqueous
slurry comprising single-wall carbon nanotubes, isolating at least some
of the single-wall carbon nanotubes in the solvent, and removing the
solvent from the single-wall carbon nanotubes to form dried single-wall
carbon nanotubes. A spheroidal aggregate of single-wall carbon nanotubes
is formed wherein the aggregate is approximately spherical and has a
diameter in a range of about 0.1 and about 5 mm, and wherein the
aggregate contains at least about 80 wt % single-wall carbon nanotubes.
The spheroidal aggregates of single-wall carbon nanotubes are easily
handled in industrial processes and are redispersable to single-wall
carbon nanotubes and/or ropes of single-wall carbon nanotubes. This
invention can also be applied to multi-wall carbon nanotubes.