Study of the Removal of Sodium and Calcium Ions from Saturated Diethylene Glycol (SDEG) Using Soda Ash Solutions
Authors
Mamarasulov B.S., Koshanova B.T., Erkaev A.U., Reymov A.M., Reymov K.D.
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This paper explores the process of removing sodium and calcium ions from saturated diethylene glycol (SDEG), used in natural gas dehydration. It was established that during operation, SDEG accumulates impurities, including sodium and calcium chlorides, which affect its efficiency. Studies were conducted on the solubility of these salts in DEG solutions at varying temperatures and concentrations. It was shown that calcium mainly remains in solution during evaporation, complicating regeneration. A two-stage purification process is proposed: preliminary precipitation of calcium as carbonate using a 30% soda ash solution, followed by evaporation and removal of sodium chloride. X-ray diffraction analysis and chemical composition of the precipitates confirm the effectiveness of the proposed method. The developed approach enhances DEG regeneration quality and prevents impurity buildup in the system.
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Authors
Mamarasulov B.S., Koshanova B.T., Erkaev A.U., Reymov A.M., Reymov K.D.
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