Recovery of Polyvinyl Alcohol Wastewater with Sodium Polyphosphate

Abstract:

The recovery of polyvinyl alcohol (PVA) by flocculation method is investigated. The sodium polyphosphate is used as flocculating agent. The sodium sulfate produced by the relation between sodium hydroxide and sulfuric acid is used as salting-out agent. The sodium carbonate is used as coagulating agent. The optimal component ratio of flocculating agent, salting-out agent, coagulating agent is obtained by orthogonal experiment. The absorbency of PVA solution is selected as a reference index. PVA content was determined with spectrophotometry. The structure of recovered PVA is analyzed by infrared spectrum. The results show that the PVA recovery rate is as high as 96.5%.Keywords: flocculation method; PVA; sodium polyphosphate; orthogonal experiment;

• Periodical: Advanced Materials Research (Volume 800)
• Pages: 546-549
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.800.546
• Online since: September 2013
• Authors: Zhang Yue, Mei Yan Yu, Wang Hui
• Keywords: Flocculation Method, Orthogonal Experiment, PVA, Sodium Polyphosphate

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