Proceedings of the International scientific and practical conference ―Modern Science and Education‖ (April 10-12, 2026) / Publisher website: www.naukainfo.com. – Paris, France, 2026. - 217 p.

55 synthesis of polysulfides [3], or it can be converted to thiols under the action of sodium polysulfide: O=S(CH 2 CH 2 Cl) 2 + n Na 2 S 4 →Na 2 -[-SCH 2 CH 2 S(O)CH 2 CH 2 S 2 -S-] n -SNa→ → (HCl/Н 2 О)НS 3 -[-SCH 2 CH 2 S(O)CH 2 CH 2 S 2 -S-] n -SH. The method is implemented in a one-way process with almost complete conversion of the original sulfide. Sulfoxide can be used as an intermediate product of the synthesis of oligosulfidosulfoxides of the general formula Na[- CH 2 CH 2 S(O)CH 2 CH 2 S-] n -SС(S)OC 4 H 9 , which are effective sorbents of noble metals [4]. One of the main factors that hinder the detoxification of mustard gas is its limited solubility in aqueous solutions of degasser substances (at 25 °С, the solubility is 0.0043 mol per 1 liter) [5]. At the same time, the advantage of detoxification methods in aqueous degassing solutions is undoubted, because water is the most available and environmentally safe component. Since the completeness of neutralization of heterophase systems such as "mustard powder - aqueous degasser solution", "mustard solution in hydrophobic solvents - aqueous degasser solution" is primarily limited by the solubility of the components, one of the ways to increase the efficiency of mustard gas degassing can be the use of interphase transfer catalysts. A method of mustard gas detoxification under the conditions of interphase catalysis [6] is proposed, which consists in the interaction of aqueous alkali solutions with mustard gas and its solutions in hydrophobic solvents with the participation of interphase transfer catalysts (in the amount of 1 : 1000 to the amount of starting mustard gas). The process is carried out at a temperature of 40-60 °C while stirring the reaction mass using vibration. Detoxification, depending on the ratio "lye: mustard gas: catalyst", ends in 5-30 minutes. After completion of the reaction, the alkaline emulsion is burned or disposed of. The degree of mustard gas conversion reaches 99.999%. The main products are 1,4-dithiane (15.2%), 2-chloroethylvinyl sulfide (46.1%) and propylvinyl sulfide (1.6%).