Abstract: [Problems] A carbon nanotube has a low apparent bulk density and therefore has serious problems in the workability upon use. Particularly when two or more types of carbon nanotubes are used together, the workability becomes more serious, and it is more difficult to exploit the properties of the carbon nanotubes. [Means for Solving the Problems] One or more types of carbon nanotubes are mixed and granulated. In this manner, it becomes possible to increase the apparent bulk density of a carbon nanotube, improve the workability of a carbon nanotube during the production of a resin master batch or a dispersion solution, and exploit the properties of a carbon nanotube satisfactorily.

Abstract: A carbon-covered lithium transition metal oxide which comprises a lithium transition metal oxide and carbon black attached on the surface thereof, wherein the carbon black covers 80% or more of the lithium transition metal oxide; a carbon-covered lithium transition metal oxide which comprises a lithium transition metal oxide and carbon fiber attached on the surface thereof; and a positive electrode material for a secondary cell which comprises the carbon-covered lithium transition metal oxide.

Abstract: A water repellent carbonaceous material obtained by contacting a carbonaceous material with a water repellent material in a melted state.

Abstract: There are disclosed a conductive antioxidant paint suitably used as an antioxidant material for a graphite electrode used in arc furnaces such as electric steel-making furnaces, and a graphite electrode coated with the conductive antioxidant paint.

Abstract: There are disclosed a conductive antioxidant paint suitably used as an antioxidant material for a graphite electrode used in arc furnaces such as electric steel-making furnaces, and a graphite electrode coated with the conductive antioxidant paint.

Abstract: There are disclosed a conductive antioxidant paint suitably used as an antioxidant material for a graphite electrode used in arc furnaces such as electric steel-making furnaces, and a graphite electrode coated with the conductive antioxidant paint.

Abstract: The present invention relates to a high-resistivity carbon black coated with a resin on the surface and having a volume resistivity of not less than 100 &OHgr;·cm.

Abstract: The present invention relates to a polyamide resin composition comprising a polyamide resin, a modified ethylene copolymer, an amide-based dispersant and an electroconductive material, said composition having not more than 1011 &OHgr;·cm of an intrinsic volume resistivity and not less than 30 KJ/m2 of an Izod impact strength measured according to ASTM D256.

Abstract: The present invention relates to a carbon black and a process for producing the same. More particularly, the present invention relates to a coloring carbon black having both high blackness and excellent dispersibility, and to a process for producing the same.

Abstract: A pigment composition for liquid toner comprising a carbon black, a resin and non-aqueous solvent, the carbon black and the resin being dissolved and dispersed in the non-aqueous solvent, and any one of (1) carbon black having a grit content of not more than 10 ppm and an ash content of not more than 0.1% by weight, (2) such carbon black that a value obtained by dividing a total amount of oxygen calculated from a composition of volatile components in carbon black at 1,500.degree. C. by a specific surface area thereof, lies in the range of 0.20 to 0.40 mg/m.sup.2, and (3) such carbon black that when extracted with monochlorobenzene, the content of polynuclear aromatic hydrocarbons in the extract is not more than 30 ppm, being used as the carbon black. The composition is produced by kneading the pigment and the resin together, freeze-pulverizing the mixture and then dissolving and dispersing the resultant particles in the non-aqueous solvent.

Abstract: A method for producing carbon black by means of a horizontal carbon black production furnace having a first reaction zone in which a mixture of an oxygen-containing gas and a fuel is burned to form a high temperature gas stream, a second reaction zone in which a hydrocarbon feedstock is supplied and reacted with the high temperature gas stream formed in the first reaction zone, and a third reaction zone in which quenching water is sprayed into the gas mixture from the second reaction zone to terminate the reaction, wherein the second reaction zone is constructed to have a hollow cylindrical structure with at least two cylindrical sections having different inner diameters connected to one another and the hydrocarbon feedstock is divided for supply so that it is supplied to at least two locations including an upstream cylindrical section to which the hydrocarbon feedstock is first supplied and a cylindrical section located downstream thereof and so that the flow velocities of gases passing through the respectiv

Abstract: A process for producing carbon black by thermally decomposing a hydrocarbon starting material in a production furnace by introducing the starting material to a high temperature zone heated by a high temperature combustion gas formed by burning a fuel and an oxygen-containing gas by a high temperature combustion gas-generating burner, characterized in that an alkali metal compound and/or alkaline earth metal compound is (A) introduced from alkali burner, burner specially itemed for ionizing the alkali metal compound and/or alkaline earth metal compound, set independently from said high temperature combustion gas-generating burner, for burning a mixture of a fuel and an oxygen-containing gas, or (B) ionized in an ionizing furnace specially itemed for ionizing the alkali metal compound and/or alkaline earth metal compound, and then introduced to the production furnace.

Abstract: A process for producing carbon black by a furnace method wherein carbon black is produced in a reaction system comprising a first zone where a mixture of a fuel hydrocarbon and an oxygen-containing gas is burned to form a high temperature combustion gas atmosphere, and a starting oil material is continuously supplied to the high temperature combustion gas atmosphere, and a second zone, as a down-stream zone subsequent to the first zone, where a carbon black-suspended hot gas formed in the first zone flows in and is rapidly cooled, characterized in that carbon dioxide or carbon dioxide and steam are supplied to the first zone and/or the second zone to bring the carbon dioxide concentration in the second zone within a range of from 15 to 70% by volume, and the retention time of the carbon black-suspended hot gas in the second zone is at least 0.2 second.