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| Neutralization-complex extraction treatment of amantadine pharmaceutical amination wastewater and bromination wastewater |
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Abstract Influences of neutralization process on pollutants removal of the two wastewaters were investigated firstly. Then the complex extraction of the neutralized wastewater was carried out by using P204 as the extractant and octanol as the diluent. The results showed that the neutralization process could highly remove pollutants in the wastewater and avoid emulsification in the following complex extraction; Under the conditions of pH value 8.0, oil-water ratio 1:1and P204:octanol=3:2, the single stage extraction efficiency of TOC and amantadine was 49.6% and 99.5%, respectively; Multi-stage extraction had no significant improvement on TOC removal; As stripping agent HCl solution of 2.0mol/L was used with a water: oil phase ratio of 1:1, about 47.5% of amantadine was stripped from the loaded solvent; The recycled amantadine hydrochloride solution can be reused in the amantadine production process. The P204-octanol complexing extractant can be reused multiple times in the extraction and back-extraction processes.
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Received: 17 December 2013
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