Process of isolating carbon nanotubes from a mixture containing carbon nanotubes and graphite particles
US5560898A · kind A · utility
111Cited by
2References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/845
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Carbon nanotubes are isolated from a mixture containing the carbon nanotubes and graphite particles by a process including the steps of: finely pulverizing the mixture; dispersing the pulverized product in a liquid medium; centrifuging the resulting dispersion to obtain a supernatant containing carbon nanotubes and graphite particles having a particle size of 0.3 .mu.m or less; separating the supernatant into a solid phase and a liquid phase; and calcining the solid phase in an oxygen-containing atmosphere at a temperature sufficient to burn the graphite particles and to leave the nanotubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.