The water‐formaldehyde‐hydrogen sulfide system. I. Solubility of hydrogen sulfide in aqueous solutions of formaldehyde and first solid product of the system

摘要

AbstractWe have ascertained that aqueous solutions of formaldehyde absorb hydrogen sulfide proportionally to the formaldehyde present in solution. The highest molar ratio obtainable in solution is equivalent to the value CH2O/H2S = 2. When this ratio is reached, regardless of the initial concentration of formaldehyde, if the solutions are maintained constantly under pressure of hydrogen sulfide, separation of a solid product begins. Various chemical and physical studies indicate that the first solid separated from this system is HSCH2SCH2SCH2OCH2OH. A possible mechanism of formation of this compound from the liquid phase is discussed.