Patent ID: 9108851
Filing Date: 2015-08-18
Classification: B82Y,C01B

Abstract:
1. A process for preparing a highly conductive carbon nanotube having bundle moieties with ultra-low bulk density comprising the steps of : i) obtaining a metal catalyst composition prepared by the following preparation steps comprising; a) dissolving 100 weight parts of metal catalyst particles represented by the following formula in water to obtain a solution, b) adding and mixing 0.1-20 weight parts of at least one low molecular weight polymer as an anti-aggregation agent to the solution obtained in step a) to yield a catalyst solution, c) spraying the catalyst solution into a high temperature reactor by a gas atomization method to obtain a gas atomized material, and d) preparing the metal catalyst composition with pyrolysis of the gas atomized material; (Fe, Co, Ni) wherein p and q represent molar fraction of p+q=1, 0.3≦p≦0.8, 0.2≦q≦0.7, a, b and c represent molar fraction of Al, Mg, Mn, respectively; a+b+c=1, 0.1≦a≦0.8, 0.1≦b≦0.9, 0.01≦c≦0.2, and ii) synthesizing a carbon nanotube having bundle moieties using a carbon source at 600-800° C. in the presence of the metal catalyst composition obtained in step i) according to a chemical vapor deposition method, wherein the apparent density of the metal catalyst particles is 0.03-0.90g/cc and the apparent density of the highly conductive carbon nanotube having bundle moieties is 0.003-0.010g/cc, wherein said at least one low molecular weight polymer has a weight average molecular weight(M