SEPARATE-COLLECTING METHOD OF PHOSPHORIC ACID FROM ACETIC ACID-NITRIC ACID-PHOSPHONIC ACID MIXED ACID WASTE WATER USING TRIALKYL PHOSPHATE AS AN EXTRACTANT

摘要

PURPOSE: A separate-collecting method of phosphoric acid from acetic acid-nitric acid-phosphoric acid mixed acid waste water is provided to collect the phosphoric acid from an extraction residue of the mixed acid waste water. ;CONSTITUTION: A separate-collecting method of phosphoric acid from acetic acid-nitric acid-phosphoric acid mixed acid waste water comprises the following steps: mixing the waste water containing acetic acid, nitric acid, the phosphoric acid with extraction agent liquid containing trialkyl phosphate and aliphatic linear saturated hydrocarbon with 6~13carbons; selectively dissolving the acetic acid and the nitric acid in the extraction agent; collecting the phosphoric acid from the extraction residue; and contacting the extraction agent containing the acetic acid and the nitric acid with exfoliation water.;COPYRIGHT KIPO 2011