Processes and systems for producing desulfurized alpha olefins

A process for producing desulfurized alpha olefins, the process comprising:

• reacting a conjugated diene compound and a hydrocarbon oil stream comprising alpha olefins in a Diels-Alder reactor at a temperature of 100° C. to 250° C. to form an effluent stream comprising adducts of the conjugated diene compound and the alpha olefins;
• subjecting the effluent stream to a hydrodesulfurization catalyst and a hydrogen stream in a hydrodesulfurization reactor to produce a hydrodesulfurized effluent stream comprising the adducts of the conjugated diene compound and the alpha olefins, a saturated C5+ hydrocarbon stream, and a gaseous stream, wherein the gaseous stream comprises hydrogen, sulfides, C1-C4 saturated hydrocarbons, or combinations thereof;
• separating the adducts of the conjugated diene compound and the alpha olefins, the saturated C5+ hydrocarbon stream, and the gaseous stream;
• and
• cracking the adducts of the conjugated diene compound and the alpha olefins in a first thermal cracking reactor operating at a temperature greater than 250° C. to produce a decomposed adducts stream comprising an alpha olefin stream and a recovered conjugated diene compound stream.