Co-Processing Pyoil Through Desalter and Cracking Furnace with Integral Vapor-Liquid Separator to Generate Circular Products

A method comprising:

• mixing a plastic-derived pyrolysis oil at a temperature of about 100° C. to 200° C. to be desalted with water to form a first oil/water emulsion;
• passing the oil/water emulsion to a first desalting vessel, wherein the oil/water emulsion is separated into an aqueous phase and an oleaginous phase;
• removing at least a portion of the oleaginous phase from the first desalting vessel as an inter-stage feed;
• mixing the inter-stage feed with additional water to form a second oil/water emulsion;
• passing the second oil/water emulsion to a second desalting vessel for separation of hydrocarbons and the additional water;
• removing a desalted pyrolysis oil from the second desalting vessel, wherein the desalted pyrolysis oil has a chloride concentration 90 wt. % less than a chloride concentration of the plastic-derived pyrolysis oil;
• introducing desalted pyrolysis oil to a steam cracking furnace for preheating;
• mixing the desalted pyrolysis oil with at least steam;
• separating a mixture of the desalted pyrolysis oil and the steam into a vapor phase and liquid phase, wherein the vapor phase comprises volatile hydrocarbons in an amount of about 55 wt. % to about 70 wt. % and steam in an amount of about 30% wt. % to about 45 wt. %;
• heating the vapor phase to a temperature of about 425° C. to about 650° C.;
• and
• steam cracking at least a portion of the vapor phase to form at least a cracking effluent;
• and
• recovering at least olefins from the cracking effluent.