Steam cracking of hydrocarbon feedstocks containing salt...

C - Chemistry – Metallurgy – 10 – G

Patent

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C10G 9/16 (2006.01) C07C 4/04 (2006.01) C10G 9/06 (2006.01) C10G 9/20 (2006.01) C10G 9/36 (2006.01)

Patent

CA 2567128

A process for cracking a hydrocarbon feedstock containing salt and/or particulate matter, wherein said hydrocarbon feedstock containing salt and/or particulate matter is heated, then separated into a vapor phase and a liquid phase by flashing in a flash separation vessel, separating and cracking the vapor phase which comprises less than about 98% of the hydrocarbon feedstock containing salt and/or particulate matter, and recovering cracked product. The salt and/or particulate matter are removed in the liquid bottoms stream from the flash separation vessel. The liquid phase could then be sold as bunker C fuel oil or fed to a refinery catalytic cracker or coker unit without desalting.

L'invention concerne un procédé de craquage de charge d'hydrocarbures contenant un sel et/ou une matière particulaire, ladite charge d'hydrocarbures contenant du sel et/ou une matière particulaire étant chauffée puis séparée en une phase vapeur et en une phase liquide par vaporisation instantanée dans une cuve de séparation par vaporisation instantanée, séparation et craquage de la phase vapeur qui comprend moins d'environ 98 % de la charge d'hydrocarbures contenant du sel et/ou une matière particulaire et récupération du produit craqué. Le sel et/ou la matière particulaire sont éliminés dans le flux de résidu liquide de la cuve de séparation par vaporisation instantanée. La phase liquide peut ensuite être vendue en tant que mazout lourd C ou acheminé vers une unité de cokeur ou de craqueur catalytique de raffinerie sans dessalage.

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