Separation of fullerene C60 and C70 using crystallization
US7875086B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Jan 25, 2011 |
| Priority date | — |
| Expiry date | Sep 19, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/156
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is a method for simultaneously separating two highly pure fullerenes from a mixture of fullerenes via crystallization, by (i) adjusting the amount of solvent in the mixture fed to a first crystallizer to obtain a phase equilibrium behavior so a first fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; (ii) adjusting the amount of solvent in another mixture fed to a second crystallizer, operating at a temperature different from the first crystallizer, to obtain a phase equilibrium behavior so a second fullerene component of the two fullerenes, in the form of pure crystal, solid solution crystal, or solvate crystal is obtained; and additionally (iii) purifying the solid solution or the solvate into highly pure fullerene, when the solid product from the crystallizers is in the form of solid solution or solvate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.