Patent ID: 7074980
Filing Date: 2006-07-11
Classification: B82Y,C01B,C01P,Y10S

Abstract:
1. Purification process of carbon nanotubes characterized in that it comprises at least the following steps, solubilization of the carbon nanotubes (p-NT) through their organic functionalization in which the functionalization reaction is obtained on the nanotubes with 1,3-dipolar reaction of azomethine ylides and separation from metal contaminants, purification from carbon contaminants of functionalized carbon nanotubes (f-NT) obtained in the previous step by precipitation of functionalized carbon nanotubes with solvents from their organic solutions, heat treatment of functionalized carbon nanotubes obtained in the previous step to regenerate the initial non-functionalized carbon nanotubes free from traces of metal and carbon contaminants.