Process for the preparation of super needle coke
US4814063A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Sep 8, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10B57/045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.