Process for steam cracking heavy hydrocarbon feedstocks

Details Process for steam cracking heavy hydrocarbon feedstocks Process for steam cracking heavy hydrocarbon feedstocks

C - Chemistry, Metallurgy

10

G

C10G 9/36 (2006.01)

Patent

CA 2561356

A process for cracking heavy hydrocarbon comprising heating the heavy hydrocarbon feedstock, mixing the heavy hydrocarbon feedstock with a fluid and/or a primary dilution steam stream to form a mixture, flashing the mixture to form a vapor phase and a liquid phase, separating and cracking the vapor phase, and cooling the product effluent in a transfer line exchanger, wherein the amount of the fluid and/or the primary dilution steam stream mixed with the heavy hydrocarbon feedstock is varied in accordance with at least one selected operating parameter of the process, such as the temperature of the flash stream before entering the flash/separator vessel.

La présente invention concerne un procédé de craquage d'hydrocarbure lourd par lequel on chauffe le brut lourd, on le mélange à un fluide et/ou à un courant de vapeur de dilution primaire de façon à donner un mélange, on fait la vaporisation instantanée du mélange pour donner une phase vapeur et une phase liquide, on sépare et craque la phase vapeur, et on refroidit l'effluent du produit dans un échangeur de ligne de transfert. En l'occurrence, la quantité de fluide et/ou de courant de vapeur de dilution primaire mélangé au brut lourd varie en fonction de l'un au moins des paramètres de fonctionnement choisi pour le processus, et notamment la température du courant de vaporisation instantanée avant de pénétrer dans le cuve de séparation ou de vaporisation instantanée.

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