Synthesis of synthetic graphite from expanded polystyrene
OwnerDipendu Saha, Hippolyte A. Grappeinventors
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Abstract
In the first and second embodiments of the process for synthesizing synthetic graphite from expanded polystyrene (EPS), EPS is sulfonated with a solvent and sulfuric acid to obtain stabilized expanded polystyrene. The stabilized EPS is then graphitized using a catalyst to obtain synthetic graphite. In the second embodiment of the process, the stabilized EPS is carbonized at a predetermined elevated temperature to obtain carbonized EPC, and the carbonized EPS is mixed with a boron catalyst and heated in a furnace to obtain the synthetic graphite.
Claims16
A process for synthesizing synthetic graphite from expanded polystyrene, the process comprising:
- (a) sulfonating the expanded polystyrene with a solvent and sulfuric acid to obtain stabilized expanded polystyrene;
- and
- (b) graphitizing the stabilized expanded polystyrene using a catalyst to obtain synthetic graphite, comprising:
- mixing the stabilized expanded polystyrene and the catalyst to obtain a mixture and heating the mixture in a temperature range between about 1800° C. and about 3300° C. in an inert atmosphere.
A process for synthesizing synthetic graphite from expanded polystyrene, the process comprising:
- (a) sulfonating the expanded polystyrene with sulfuric acid in the presence of a solvent to obtain stabilized expanded polystyrene;
- (b) carbonizing the stabilized expanded polystyrene at a predetermined elevated temperature in a furnace to obtain carbonized expanded polystyrene, and cooling the carbonized expanded polystyrene to room temperature;
- and
- (c) graphitizing the carbonized expanded polystyrene using a catalyst to obtain synthetic graphite, comprising:
- mixing the carbonized expanded polystyrene and the catalyst to obtain a mixture and heating the mixture in a temperature range between about 1800° C. and about 3300° C. in an inert atmosphere to obtain synthetic graphite.
Dependencies are inferred from the claim text.