Sodium hydrosulfide solubility curve
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32% caustic soda is used to absorb hydrogen sulfide in acidic gases, and crystallization often occurs, blocking the inlet distributor. Using a lower concentration of alkali solution results in sodium hydrosulfide solutions that are difficult to sell. What are some effective ways to reduce the risk of crystallization?
May I ask in which products can 32% sodium hydrosulfide be used?
Increasing the system temperature to raise the solubility of the salt could be considered. Consult the relevant manuals to calculate the solubility characteristics using A+.
For absorption, it is better to use low-concentration liquid caustic to address the crystallization issue, and then concentrate it through evaporation.