Sulfidation reaction

The components required for synthesizing sulfurized oil are: elemental sulfur at 10%–20%, phosphates at 0.5%–2.5%, with the remainder being vegetable oil rich in oleic acid. The method for synthesizing sulfurized oil involves heating a reaction vessel containing a certain amount of vegetable oil; once the temperature reaches 100–120°C, a stirrer is started to mix the contents. Elemental sulfur, accounting for 10–20% of the total amount of vegetable oil in the vessel, is added in two batches, with each batch representing half of the total amount to be added, and an interval of 25–40 minutes between the additions. While continuing to stir, the temperature is raised to 140–150°C, after which phosphates are added—amounting to 0.5%–2.5% of the total amount of vegetable oil in the vessel. The mixture is kept at this temperature for 4–6 hours before the reaction is stopped. The sulfur content of the resulting sulfurized oil, after filtration, is 11–12.5%.