Methods and apparatus for the production of carbon-containing materials
View Patent ↗The present invention provides various methods and apparatus for the production of fullerenes and other carbon-containing materials. In some aspects, the invention provides an arc chamber comprising a graphite element support, wherein the support comprises a rotatable frame adapted for moving each graphite element towards and away from an arc discharge position. In other aspects, the invention provides a collection chamber for collecting carbon-containing materials produced in an arc chamber, wherein the collection chamber comprises an inlet and a rotatable element arranged to direct the carbon-containing material to a wall of the collection chamber, wherein the sectional area occupied by the rotatable element increases with distance from the inlet. In other aspects, the invention provides a collection chamber comprising means for isolating the collection chamber from an arc discharge apparatus and an inlet for the introduction of solvent into the collection chamber.
1. An apparatus for the production of fullerenes, the apparatus comprising:
an arc chamber;
a graphite element support for supporting a plurality of graphite elements in the arc chamber, wherein the graphite element support comprises a rotatable frame adapted for moving each graphite element towards and away from an arc discharge position;
means for forming an arc in the arc chamber to effect vaporisation of material of a graphite element in the arc discharge position;
a collection chamber in communication with the arc chamber, wherein the collection chamber comprises an inlet for receiving fullerenes from the arc chamber and a rotatable element configured to rotate and direct the fullerenes to a wall of the collection chamber, wherein the inlet of the collection chamber is located above the arc chamber, and wherein the rotatable element is a conical element arranged with its apex facing the inlet; and
means for supplying a gas to the arc chamber.
2. An apparatus according to claim 1 , which comprises a plurality of the graphite element supports.
3. An apparatus according to claim 1 , further comprising means for supporting a secondary graphite element such that the arc passes between the secondary graphite element and one of said plurality of graphite elements in said position.
4. An apparatus according to claim 1 , which comprises a current source connected to one of the graphite elements.
5. An apparatus according to claim 1 , further comprising means for applying at least a partial vacuum to the interior of the arc chamber.
6. An apparatus according to claim 1 , further comprising means for advancing the graphite elements in the arc chamber during vaporisation.
7. An apparatus according to claim 1 , further comprising a plurality of electrodes, wherein each of the electrodes is attachable to one of the graphite elements in the arc chamber.
8. An apparatus according to claim 3 , wherein the secondary graphite element is movable in the arc chamber.
9. An apparatus according to claim 6 , further comprising means for determining the relative position of the graphite elements in the arc chamber, the means for advancing the graphite elements being controlled on the basis of the determination.
10. An apparatus according to claim 1 , wherein the apparatus further comprises means for isolating the collection chamber from the arc chamber and the collection chamber comprises a solvent inlet for the introduction of solvent into the collection chamber.
11. An apparatus according to claim 10 , wherein the solvent inlet is arranged such that solvent can be introduced into the collection chamber under substantially anaerobic conditions.