Abrégé

An improved method of producing purified graphite is described in which graphite material is mixed with a solid phase alkali to form a solid alkali-graphite mixture. The solid alkali-graphite mixture is subject to an alkali bake, and then any remaining alkali is released using water. The graphite material is then subject to a first acid wash followed by neutralising and washing the acid washed graphite material to deliver an intermediate purified graphite product. The intermediate purified graphite product is then subject to an alkali leach, and then any remaining alkali in the intermediate purified graphite product is released using water. The intermediate purified graphite product is then subject to an acid wash, which is followed by neutralising and washing the intermediate purified graphite product to deliver a final purified graphite product.

Classes IPC  ?

• C01B 32/215 - PurificationRécupération ou purification du graphite produit lors de la fabrication du fer, p. ex. le graphite primaire

Abrégé

An improved method of producing purified graphite is described in which graphite material is mixed with a solid phase alkali to form a solid alkali-graphite mixture. The solid alkali-graphite mixture is subject to an alkali bake, and then any remaining alkali is released using water. The graphite material is then subject to a first acid wash followed by neutralising and washing the acid washed graphite material to deliver an intermediate purified graphite product. The intermediate purified graphite product is then subject to an alkali leach, and then any remaining alkali in the intermediate purified graphite product is released using water. The intermediate purified graphite product is then subject to an acid wash, which is followed by neutralising and washing the intermediate purified graphite product to deliver a final purified graphite product.

Classes IPC  ?

• C01B 32/215 - PurificationRécupération ou purification du graphite produit lors de la fabrication du fer, p. ex. le graphite primaire

Abrégé

A two-stage method of producing purified graphite is described. The first stage of the method comprises the steps of subjecting graphite material to a caustic bake and releasing any remaining caustic using water. The graphite material is then subjected to a first acid wash. Neutralising and washing the acid washed graphite material is then performed to deliver an intermediate purified graphite product. In the second stage the intermediate purified graphite product is subjected to a low temperature caustic leach. Any remaining caustic in the intermediate purified graphite product is released using water, and the intermediate purified graphite product is subjected to a second acid wash. Finally, neutralising and washing the intermediate purified graphite product is performed to deliver a final purified graphite product with a purity of 99.95% C and above.

Classes IPC  ?

• C01B 32/215 - PurificationRécupération ou purification du graphite produit lors de la fabrication du fer, p. ex. le graphite primaire

Abrégé

A two-stage method of producing purified graphite is described. The first stage of the method comprises the steps of subjecting graphite material to a caustic bake (14) and releasing any remaining caustic using water (16, 18). The graphite material is then subjected to a first acid wash (20). Neutralising and washing the acid washed graphite material is then performed (22, 24) to deliver an intermediate purified graphite product (28). In the second stage the intermediate purified graphite product is subjected to a low temperature caustic leach (34). Any remaining caustic in the intermediate purified graphite product is released using water (35, 36, 38), and the intermediate purified graphite product is subjected to a second acid wash (40). Finally, neutralising and washing the intermediate purified graphite product is performed (42, 44, 45) to deliver a final purified graphite product (46) with a purity of 99.95%C and above.

Classes IPC  ?

• C01B 32/215 - PurificationRécupération ou purification du graphite produit lors de la fabrication du fer, p. ex. le graphite primaire
• H01M 4/583 - Matériau carboné, p. ex. composés au graphite d'intercalation ou CFx

Produits et services

Graphite; graphite for industrial purposes; graphite for industrial use; carbon; preparations of carbon and of charcoal for industrial use.

Produits et services

Natural graphite; graphite for industrial purposes; graphite for industrial use; carbon; preparations of carbon and of charcoal for industrial use