The present technology provides a process that includes heating a first mixture of elemental sulfur and particles comprising an alkali metal sulfide in a liquid hydrocarbon to a temperature of at least 150 C., to provide a sulfur-treated mixture comprising agglomerated particles; and separating the agglomerated particles from the sulfur-treated mixture to provide a desulfurized liquid hydrocarbon and separated solids. This process may be used as part of a suite of processes for desulfurizing liquid hydrocarbons contaminated with organosulfur compounds and other heteroatom-based contaminants. The present technology further provides processes for converting carbon-rich solids (e.g., petroleum coke) into fuels.

Process of extracting sulphur-containing compounds from a hydrocarbon cut of the gasoline or LPG type by liquid-liquid extraction with a soda solution employing a unit (2) for pretreatment of the feedstock to be treated located upstream of the unit (4) for extraction with soda, said pretreatment unit consisting of a first pretreatment reactor operating in batch mode followed by a second continuous reactor of the piston type operating in piston mode.

Process of extracting sulphur-containing compounds from a hydrocarbon cut of the gasoline or LPG type by liquid-liquid extraction with a soda solution employing a unit (2) for pretreatment of the feedstock to be treated located upstream of the unit (4) for extraction with soda, said pretreatment unit consisting of a first pretreatment reactor operating in batch mode followed by a second continuous reactor of the piston type operating in piston mode.

A process and apparatus for sweetening a hydrocarbon stream. The apparatus includes two vessels. In a first extraction vessel, caustic removes mercaptans from the hydrocarbon stream. In a second oxidation vessel, the mercaptans in the rich caustic are converted in disulfides. The lean caustic and disulfides are passed back to the first extraction vessel in which the disulfides are separated into the sweetened hydrocarbon phase. The second vessel may receive a wash oil, such as the sweetened hydrocarbon phase, to remove disulfides from a vented gas stream.

A process and apparatus for sweetening a hydrocarbon stream. The apparatus includes two vessels. In a first extraction vessel, caustic removes mercaptans from the hydrocarbon stream. In a second oxidation vessel, the mercaptans in the rich caustic are converted in disulfides. The lean caustic and disulfides are passed back to the first extraction vessel in which the disulfides are separated into the sweetened hydrocarbon phase. The second vessel may receive a wash oil, such as the sweetened hydrocarbon phase, to remove disulfides from a vented gas stream.

The present disclosure relates to a method for processing of liquefied waste plastics (LWP). The method includes subjecting a liquefied waste plastic-based feedstock to heat treatment (HT processing) in an aqueous solution containing alkali metal hydroxide and/or alkaline earth metal hydroxide to form a heat treated effluent, transferring the heat treated effluent to a separator, subjecting the heat treated effluent to phase separation to isolate at least an oil phase including treated LWP and an aqueous phase including contaminated material, and recycling at least a part of the aqueous phase back to the HT processing.

The present disclosure relates to a method for processing of liquefied waste plastics (LWP). The method includes subjecting a liquefied waste plastic-based feedstock to heat treatment (HT processing) in an aqueous solution containing alkali metal hydroxide and/or alkaline earth metal hydroxide to form a heat treated effluent, transferring the heat treated effluent to a separator, subjecting the heat treated effluent to phase separation to isolate at least an oil phase including treated LWP and an aqueous phase including contaminated material, and recycling at least a part of the aqueous phase back to the HT processing.