Process for the preparation of super needle coke

Details Process for the preparation of super needle coke Process for the preparation of super needle coke

1987-09-08

1989-03-21

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 57, 208 58, 208 61, 208 89, 208131, C10B 5500, C10G 6906

Patent

active

048140635

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 from 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/cm.sup.2 G.). The temperature is 470.degree. to 520.degree. 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.degree. to 465.degree. C. and the pressure range is over 0.19 to 0.98 MPa (2 to 10 Kg/cm.sup.2 G).

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