Improved stability of hydrocarbons containing asphaltenes

Details Improved stability of hydrocarbons containing asphaltenes Improved stability of hydrocarbons containing asphaltenes

C - Chemistry, Metallurgy

10

G

C10G 29/06 (2006.01) C10L 1/18 (2006.01) C10L 1/24 (2006.01)

Patent

CA 2532924

Heavy fuel oils or residual fuel oils can be stabilized with magnesium overbased compounds such as magnesium overbased carboxylates. It was surprisingly discovered that adding magnesium overbased carboxylates to the residual fuel oils shortly after thermal cracking gave much better results than can be achieved after the application of the carboxylates to the fuel oil after storage. Further, compounds containing at least about 21 wt% magnesium also give better results than compounds with 18 wt% or less, in one non~ limiting embodiment. Magnesium overbased compounds can also be added to coker feedstocks to reduce coker furnace fouling. Treatment with the methods of this invention reduces asphaltene deposits and sludges.

les combustibles lourds ou les combustibles résiduels peuvent être stabilisés par des composés tels que des carboxylates -surdosés en magnésium. On a constaté avec surprise que l'adjonction de carboxylates surdosés en magnésium peu après le craquage thermique donnait de bien meilleurs résultats que ceux obtenus après application de carboxylates au combustible après stockage. De plus, dans un mode de réalisation non exhaustif, les composés renfermant au moins 21 % en poids de magnésium donnent de meilleurs résultats que les composants n'en renfermant que 19 % en poids ou moins. On peut aussi ajouter des composés surdosés en magnésium à l'alimentation des unités de cokéfaction afin de réduire l'encrassement des fours à coke. Le traitement selon les procédés de l'invention permet de réduire les dépôts set les boues d'asphaltènes.

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