HCl absorption
Thread Content
What are the influencing factors for the absorption water used in HCl absorption? For example, what are the requirements for sodium chloride content, and what about evaporation residue?
For the absorption of hydrogen chloride, if it is to be absorbed as an acid, pure water should be used; if the goal is not to obtain acid as a finished product, ordinary water will suffice. The absorption process is exothermic, so lower temperatures are beneficial for absorption. A small amount of chloride ions in water does not affect the absorption of hydrogen chloride. However, if the concentration of chloride ions in the water is high, it will affect, or even severely impair, the absorption of hydrogen chloride. This is due to the common-ion effect; when a large amount of sodium chloride is dissolved in water, the chloride ions released will hinder the dissolution of hydrogen chloride, resulting in a decrease in absorption efficiency.