Document Type and Number:
Japanese Patent JPH0250154
Kind Code:
B2
Abstract:
Described is the method of producing the super needle coke from graphite electrodes, wherein the starting material derived from coal tar or the starting material derived from coal tar and containing less than 0.1 weight percent of the dry sludges or quinoline insolubles is subjected to hydrogenation in the present of hydrogenation catalyst to give the hydrogenated oil which is further subjected to thermal cracking under the controlled condition and non-volatile components contained in thermally cracked oil are removed to give the starting coking material form the distillate these of which is subjected to delayed coking.The thermal cracking conditions are selected from the conditions in which the pressure range is up to 3.9 MPa (40 kg/cm2G.) The temperature is 470 to 520°C and the cold residence time is to to 350 seconds, while the coking conditions are selected from the conditions in which the temperature ranged is over 450 to 465°C and the pressure range is over 0.19 to 0.98 MPa (2 to 10 kg/cm2G).
More Like This:
Inventors:
MURAKAMI KOREJI
NAKANIWA MIKIO
NAKAYAMA YORIO
NAKANIWA MIKIO
NAKAYAMA YORIO
Application Number:
JP18949384A
Publication Date:
November 01, 1990
Filing Date:
September 12, 1984
Export Citation:
Assignee:
NIPPON KOKAN KK
International Classes:
C10B57/04; B01J23/88; B01J35/10; C01B31/00; C01B31/02; C01B31/04; C10B55/00; C10B57/00; C10G69/06; C10G69/08
Next Patent: JPH0250155