Patent ID: 11964870
Assignee: LG CHEM, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A method for preparing carbon nanotubes, the method comprising:
preparing a support comprising AlO(OH) by primary heat treatment of Al(OH)3;
preparing an active carrier by supporting a mixture including a main catalyst precursor and a cocatalyst precursor on the support;
drying the active carrier through multi-stage drying including vacuum drying, wherein the multi-stage drying comprises primary drying which is carried out at 80 to 160° C. and secondary drying which is carried out at 175 to 300° C.;
preparing a supported catalyst by secondary heat treatment of the dried active carrier; and
preparing carbon nanotubes in the presence of the supported catalyst;
wherein the primary drying is carried out such that solvent present is removed from the active carrier,
and wherein the secondary drying is carried out such that a coordination compound of the main catalyst is decomposed and discharged.