Mitsubishi Chemical Corporation

Mitsubishi Kasei Corporation

Mitsubishi Heavy Industries Limited

Hideyuki Hisashi

Shinichi Kanamaru

Akinori Sakaue

Yutaka Fukuyama

Yasuharu Suda

Katsuaki Makino

Hiroaki Kuno

Shushichi Yoshimura

Akihiro Matsuki

Tadashi Hashiguchi

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.

Carbon black and the process for producing the same

Pigment composition for liquid toner

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 respective cylindrical sections are thereby mutually differentiated within a range of from 100 to 500 m/sec.

Method for producing carbon black

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.

Process for producing carbon black

Growing community of inventors

Kitakyushu, Japan

Hideyuki Hisashi