From 2nd step and the above-mentioned column exit which from the aforementioned column entrance are developed inside

摘要

PROBLEM TO BE SOLVED: To obtain a dispersion liquid by isolating a long CNT from a rough CNT dispersion.SOLUTION: This method for producing the isolated dispersion of long CNT includes: a first step of filling beads having a bead diameter within a size range corresponding to the long CNT, preferably within a range of 0.05-5 mm, in a column as a filler; a second step of spreading the rough CNT dispersion containing at least various shapes of CNT in the column through the column inlet; and a third step of obtaining the isolated dispersion of long CNT that comes out from a column outlet by a timing corresponding to a spread speed of long CNT in the column.