聚氨废物回收:碳酸盐分量的热解
Marthe Nees1, Muhammad Adeel1, Lukasz Pazdur1
1Intelligence in Processes, Advanced Catalysts and Solvents (iPRACS), Faculty of Applied Engineering, University of Antwerp, Groenenborgerlaan 171, Antwerp 2020, Belgium.
ACS omega
|November 4, 2024
概括
本研究介绍了聚氨废物的两步化学回收方法. 它通过酒精溶解回收聚醇和通过热解回收异酸盐,从而使全材料在新的聚氨合成中可重复使用.
科学领域:
- 聚合物化学 聚合物化学
- 化学回收利用 化学回收利用 化学回收利用
- 可持续材料 可持续材料
背景情况:
- 聚氨废物的工业醇化主要回收聚醇,忽略了二碳酸盐部分 (10-40%的质量).
- 这种被忽视的碳酸盐分数代表了有价值的化学前体的重大损失.
研究的目的:
- 为聚氨废物开发一个两步化学回收工艺.
- 为了提升碳酸盐分数的价值,在传统的酒精分析中经常被忽视.
- 为了使多和异酸盐的回收实现完整的材料循环.
主要方法:
- 一个两步过程,涉及聚氨废物的初始醇化.
- 随后的热解步骤将回收的碳酸盐分数转化为异酸盐.
- 合成和热解各种碳酸盐以优化异酸盐产量,异酸盐显示出最佳结果.
主要成果:
- 异甲酸盐的热解产生了35%的异酸盐.
- 成功地将碳酸盐分数转化为一种有价值的富含异酸盐的混合物.
- 证明了回收聚合物 (通过酒精分解) 和异酸盐 (通过热解) 的可行性.
结论:
- 开发的两步循环方法提高了聚氨废物的化学循环利用.
- 回收的异酸盐和聚醇可以有效地作为合成新型聚氨的起始材料重复使用.
- 这种方法促进了聚氨材料的更全面和可持续的循环经济.
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