A method of recovering nitrile rubber from water-containing crumbs includes crumb-like nitrile rubber using an extruder in which a screw is disposed inside a barrel so as to be capable of being rotationally driven. The barrel is formed with at least a washing zone. The method includes supplying washing water to the washing zone at a water pressure of 0.2 MPa or higher while mixing the crumb-like nitrile rubber and the supplied washing water in the washing zone, thereby washing the crumb-like nitrile rubber.

A gas-assisted rubber wet mixing preparation apparatus is disclosed, including a rack, a reactor is fixedly mounted below the rack; a mixing chamber in an ellipsoidal shape is provided inside the reactor; the reactor is provided with a plurality of feed ports, the feed ports are provided at an included angle with respect to the horizontal plane; spray guns cooperating with the feed ports are fixedly mounted on an outer wall of the reactor, a material storage tank and a gas supply device are connected to the spray gun; the spray guns and the material storage tanks are in one-to-one correspondence, and the spray guns are connected to the corresponding material storage tanks respectively; a discharge port is further provided below the reactor, and a receiver tray is provided below the discharge port.

A gas-assisted rubber wet mixing preparation apparatus is disclosed, including a rack, a reactor is fixedly mounted below the rack; a mixing chamber in an ellipsoidal shape is provided inside the reactor; the reactor is provided with a plurality of feed ports, the feed ports are provided at an included angle with respect to the horizontal plane; spray guns cooperating with the feed ports are fixedly mounted on an outer wall of the reactor, a material storage tank and a gas supply device are connected to the spray gun; the spray guns and the material storage tanks are in one-to-one correspondence, and the spray guns are connected to the corresponding material storage tanks respectively; a discharge port is further provided below the reactor, and a receiver tray is provided below the discharge port.

A gas-assisted rubber wet mixing preparation apparatus is disclosed, including a rack, a reactor is fixedly mounted below the rack; a mixing chamber in an ellipsoidal shape is provided inside the reactor; the reactor is provided with a plurality of feed ports, the feed ports are provided at an included angle with respect to the horizontal plane; spray guns cooperating with the feed ports are fixedly mounted on an outer wall of the reactor, a material storage tank and a gas supply device are connected to the spray gun; the spray guns and the material storage tanks are in one-to-one correspondence, and the spray guns are connected to the corresponding material storage tanks respectively; a discharge port is further provided below the reactor, and a receiver tray is provided below the discharge port.

A gas-assisted rubber wet mixing preparation apparatus is disclosed, including a rack, a reactor is fixedly mounted below the rack; a mixing chamber in an ellipsoidal shape is provided inside the reactor; the reactor is provided with a plurality of feed ports, the feed ports are provided at an included angle with respect to the horizontal plane; spray guns cooperating with the feed ports are fixedly mounted on an outer wall of the reactor, a material storage tank and a gas supply device are connected to the spray gun; the spray guns and the material storage tanks are in one-to-one correspondence, and the spray guns are connected to the corresponding material storage tanks respectively; a discharge port is further provided below the reactor, and a receiver tray is provided below the discharge port.

A method of manufacturing a particulate polymer includes introducing a polymer latex into a vessel; distributing the polymer latex in the vessel to a coagulator via a distribution member and a redistribution member; introducing a coagulant and steam into the coagulator; breaking the polymer latex; and separating the particulate polymer. The distribution member and the redistribution member are mounted on an agitator shaft of the coagulator, and are configured such that the polymer latex in the vessel enters the open top and exits the open bottom of the distribution member and flows into the redistribution member. The polymer latex in the redistribution member then overflows into the coagulator.

A method of manufacturing a particulate polymer includes introducing a polymer latex into a vessel; distributing the polymer latex in the vessel to a coagulator via a distribution member and a redistribution member; introducing a coagulant and steam into the coagulator; breaking the polymer latex; and separating the particulate polymer. The distribution member and the redistribution member are mounted on an agitator shaft of the coagulator, and are configured such that the polymer latex in the vessel enters the open top and exits the open bottom of the distribution member and flows into the redistribution member. The polymer latex in the redistribution member then overflows into the coagulator.

A method of recovering nitrile rubber from water-containing crumbs includes crumb-like nitrile rubber using an extruder in which a screw is disposed inside a barrel so as to be capable of being rotationally driven. The barrel is formed with at least a washing zone. The method includes supplying washing water to the washing zone at a water pressure of 0.2 MPa or higher while mixing the crumb-like nitrile rubber and the supplied washing water in the washing zone, thereby washing the crumb-like nitrile rubber.