扩大基于溶解的回收利用以消除电子电子设备废弃物中的制阻燃剂
S Wagner1, L Strobl2, T Bielmeier2
1Fraunhofer Institute for Process Engineering and Packaging IVV, Process Development for Polymer Recycling, Freising, Germany; TUM School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany.
Waste management (New York, N.Y.)
|August 29, 2025
概括
基于溶解的回收有效地从废弃电气和电子设备 (WEEE) 塑料中去除制阻燃剂 (BFR). 这一过程实现了监管合规,使有价值的EEE塑料能够流通.
科学领域:
- 材料科学
- 环境科学
- 化学工程
背景情况:
- 由于混合塑料类型和制阻燃剂 (BFR) 的污染,从电气和电子设备废弃物 (WEEE) 中回收塑料面临挑战.
- 现有的回收方法难以去除BFR,导致高物质排放率和宝贵的资源焚烧.
- 阻燃性 (FR) 烯乙 styrene (ABS-FR) 和聚乙烯 (PS-FR) 在EEE中很常见,但由于BFR含量而造成回收困难.
研究的目的:
- 证明基于溶解的回收 (DBR) 技术的可行性,用于去污染含有BFR的EEE塑料.
- 评估DBR在降低BFR度方面的有效性,以达到符合法规的水平.
- 探索将DBR整合到更广泛的EEE塑料处理级联中,以提高材料循环.
主要方法:
- 一个技术规模的演示 (5公斤/天) 使用来自欧洲的切碎的EEE塑料分片 (主要是PS-FR和ABS-FR).
- 分析初始的度,包括新型BFR,四双A (TBBPA) 和二甲 (decaBDE).
- 应用基于溶解的回收过程 (DBR) 来连续提取和去除受限制的BFR.
主要成果:
- DBR 工艺成功降低了 WEEE 塑料分量的限制性 BFR 至低于 500 ppm,达到法定门.
- 测试样本中的初始度很高,达到PS-FR的12,000 ppm和ABS-FR的33,000 ppm.
- 证实了DBR对污染的有效性,确保处理的EEE塑料符合法规.
结论:
- 基于溶解的回收 (DBR) 是从特定的EEE塑料流中去除BFR的可行技术 (ABS-FR,PS-FR).
- DBR过程确保处理的EEE塑料符合BFR含量的法律限制.
- 将DBR与光谱预分类和化学回收相结合,可以为先进的WEEE塑料循环形成一个全面的布.
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