Acidification/extraction treatment of waste caustic stream
AssigneeArco Chemical Technology, L.P.
InventorsThomas I. Evans, Bernard Cooker, Rajendra S. Albal
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Abstract
The waste organics containing caustic stream from a propylene oxide/styrene monomer process is preferably first concentrated by distillation and then contacted with strong acid such as sulfuric acid and an organic solvent, the admixture is phase separated and an aqueous sodium containing phase reduced in organics is separated from an organic solvent phase reduced in sodium.
Claims6
In a process for the treatment of a waste caustic stream from the propylene oxide and styrene monomer process, the improvement which comprises admixing the said waste caustic stream with aqueous acid and water-immiscible organic solvent, phase separating the resulting admixture into an aqueous sodium containing phase and an organic phase having a reduced sodium content, and separately recovering the phases.
The process for the treatment of the waste caustic stream from the propylene oxide and styrene monomer process which comprises distilling the waste stream to separate water and light organics from a concentrated aqueous waste caustic bottoms stream, admixing the concentrated bottoms stream with aqueous acid and water-immisicible organic solvent, phase separating the resulting admixture into an aqueous sodium containing phase and an organic phase having a reduced sodium content and separately recovering the phases.
Dependencies are inferred from the claim text.