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8365032 
Journal Article 
溶剂洗涤法脱除聚丙烯中的灰分 
Qi, Y; Zhang, C; Xing, Z; Xiao, Y; Chen, X; Li, J; Jiang, T 
2020 
Research Institute of Beijing 
37 
4 
9-13 
Chinese 
A tri-component solvent including"alkane+alcohol+complexing agent"was designed to remove ash from polypropylene(PP), which reduced the residual content of Ti, Mg, Al and improved the purity of PP. The effects of detergent type, compounding method, washing time, and washing temperature on the ash removal were observed. The results show that the purity of PP is significantly improved in which the total ash content is reduced to 38 μg/g, the removal rate reaches 50.1% when n-hexane/acetylacetone/ethanol compounding solvent is used to wash PP. © 2020, Beijing Yanshan Branch, Assets Management Corporation, SINOPEC. All right reserved. 
Acetylacetone; Ash; Capacitor film; High-purity polypropylene; Solvent washing