Delayed coking process for the production of substantially...

Details Delayed coking process for the production of substantially... Delayed coking process for the production of substantially...

C - Chemistry, Metallurgy

10

B

C10B 55/00 (2006.01) C10B 57/04 (2006.01) C10G 9/00 (2006.01)

Patent

CA 2564048

A modified vacuum distillation and delayed coking process for making substantially free-flowing coke, preferably free-flowing shot coke. A vacuum resid feedstock is used which contains less than 10 wt.% material boiling between 900~F and 1040~F (482.22~C to 560~C) as determined by HTSD (High- temperature Simulated Distillation). The use of such a high boiling resid favors the formation of shot coke instead of sponge or transition coke. The distillate recycle reduces coker furnace fouling potential of the heavier feedstock.

L'invention concerne un procédé de distillation sous vide modifiée et de cokéfaction différée qui permet d'obtenir un coke à écoulement sensiblement fluide, de préférence un coke en grenaille à écoulement fluide. On utilise une charge d'alimentation de résidus sous vide qui contient moins de 10 % en poids d'un matériau à point d'ébullition compris entre 900 DEG F et 1040 DEG F (482,22 DEG C à 560 DEG C), tel que mesuré par la technique de distillation simulée à haute température ("High-temperature Simulated Distillation" ou HTSD). L'utilisation d'un résidu à point d'ébullition élevé favorise la formation d'un coke en grenaille au lieu d'un coke en éponge ou d'un coke de transition. Le recyclage du distillat permet de réduire le potentiel d'encrassement du four à coke de la charge d'alimentation plus lourde.

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