河北化工2011，Vol.34Issue(12)：55-58,76,5.
双水相萃取废液中成相物质聚乙二醇的回收利用
Study on the Recovery of Polyethylene Glycol in Spent Liquid from Aqueous Two-phase Extraction
吴立强 1刘俊果2
作者信息
- 1. 华北制药股份有限公司,河北石家庄050015
- 2. 河北科技大学生物科学与工程学院,河北石家庄050018
- 折叠
摘要
Abstract
The recovery and recycling of polyethylene glycol（PEG） in spent liquid from aqueous two phase extraction were studied in order to reduce the cost,chemical oxygen demand（COD） discharge,and precede the application of aqueous two phase extraction in industry.The spent upper phase from the aqueous two-phase system composed of polyethylene glycol（PEG） and ammonium sulfate was used for the recovery of PEG.Hydrogen peroxide（H2O2） was used for decolorization,and the optimal decolorization was reached at the H2O2 concentration of 6%,lasting for 4 h.Salting out was used for concentration,the optimal salt was sodium sulpham,and its optimal amount was 3 g/10 mL spent liquor.Further,acid washing and alkaline washing was employed for clearing the insoluble impurities.The characteristic of recycled PEG was that appearance was light yellow cereus,conductivity was 10.8 μs/cm,freezing point was 37～40 ℃,pH（5% solution） value was 6.33 and there was no significant difference with pure PEG.关键词
双水相萃取/聚乙二醇/回收利用Key words
aqueous two-phase extraction/PEG/recycling分类
化学化工引用本文复制引用
吴立强,刘俊果..双水相萃取废液中成相物质聚乙二醇的回收利用[J].河北化工,2011,34(12):55-58,76,5.
