Continuous extraction technique for the purification of carbon nanomaterials
US8454923B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2010 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Jul 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2202/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Systems and methods for the extraction of carbon nanotubes (CNTs) by continuous and/or batch processing are disclosed. Generally, a carbon nanotube material including carbon nanotubes (CNTs), carbon nanoparticles (CNPs), and carboxylated carbon (CC) is provided and agitated to produce a well-dispersed mixture. The well-dispersed mixture can be allowed to stand in a vessel having a lower end and an upper end. In some cases, the CNPs settle at the lower end. In some cases, at least some of the CNTs and CC are disposed at the upper end and can be removed in a dispersion, which can be pH adjusted and/or filtered to extract the CNTs from the CC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.