Coke production

Details Coke production Coke production

C - Chemistry, Metallurgy

10

G

196/72

C10G 9/26 (2006.01) C10B 55/00 (2006.01) C10B 57/00 (2006.01)

Patent

CA 1154707

4016 COKE PRODUCTION Abstract of the Disclosure In the delayed coking of a coking feedstock wherein the feedstock is continuously heated in a coking heater and introduced into a coke drum, the heater is operated to provide a coke drum temperature of from 415° to 455°C, and, after filling of the drum to the desired level, feed- stock introduction is discontinued and the coke drum contents are heated at a temperature of 450°C to 500°C, and which heating temperature is at least 10°C greater than the coking temperature, by passing a non-coking vapor through the con- tents of the drum to reduce the volatile combustible matter content to a value of 4% to 10% by weight and thereby re- duce the CTE of the formed coke. The process is applicable to the production of needle coke from various kinds of feed- stocks, in particular from a petroleum feedstock wherein the feedstock is initially treated by thermal soaking in the pre- sence of sulfur, followed by thermal cracking to increase the aromaticity. Noncrystalline substances may be removed prior to coking to further improve the process.

391565

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