Reactive Crystallization via Metal–Organic-Framework Formation Enables Separation of Terephthalic Acid from Textile Impurities
Reactive Crystallization via Metal–Organic-Framework Formation Enables Separation of Terephthalic Acid from Textile Impurities
复制标题
通过金属有机骨架形成的反应结晶能够从纺织品杂质中分离对苯二甲酸
DOI：
10.1021/acssuschemeng.2c05496
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发表时间：
2023
影响因子：
8.4
通讯作者：
Suntivich, Jin
中科院分区：
文献类型：
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作者：
Nason, Abigail K.;Jerozal, Ronald T.;Milner, Phillip J.;Suntivich, Jin
聚对苯二甲酸乙二醇酯（PET）纤维是生产中最大的塑料之一。PET纤维通常用于纺织品中，通常与非PET成分如棉花，染料和添加剂混合。由于这些非PET组分在解聚过程中会产生杂质，因此从纺织品的化学回收中提取高纯度对苯二甲酸（TPA）单体具有挑战性。在这里，我们展示了从含有解聚PET纤维和非PET组分的不纯粗消化混合物中提取高质量TPA。我们的方法使用反应结晶将TPA转化为金属有机框架（MOF）。由于TPA是混合物中能够形成延伸的结晶结构的唯一组分，因此随着MOF结晶，TPA单体与杂质分离。我们证明了这一概念上回收TPA（rTPA）提取从聚酯-棉混纺织物通过碱水解，其中不纯的rTPA被用作有机连接剂，以制备MOF MIL-53（Ga）。这种M0 F结晶去除了捕获的杂质。在MOF分解后，获得无色TPA，使人联想到原始级单体（产率：78%）。这些结果表明自组装诱导结晶作为一种新的策略，选择性地从复杂的混合物中回收单体。
Polyethylene terephthalate (PET) fibers are among the largest plastics in production. Used commonly in textiles, PET fibers are often blended with non-PET components such as cotton, dyes, and additives. As these non-PET components generate impurities during depolymerization, extracting a high-purity terephthalic acid (TPA) monomer from the chemical recycling of textiles is challenging. Here, we demonstrate the extraction of high-quality TPA from the impure crude digestion mixtures containing depolymerized PET fibers and non-PET components. Our approach uses reactive crystallization to turn TPA into a metal–organic framework (MOF). As TPA is the only component in the mixture capable of forming an extended, crystalline structure, TPA monomers are separated from impurities as MOF crystallizes. We demonstrate this concept on recycled TPA (rTPA) extracted from a polyester–cotton blend textile through alkaline hydrolysis, where the impure rTPA was used as an organic linker to prepare MOF MIL-53(Ga). This MOF crystallization removed the trapped impurities. After MOF disassembly, colorless TPA, reminiscent of a virgin-grade monomer, was obtained (yield: 78%). These results demonstrate self-assembly-induced crystallization as a new strategy to selectively recover monomers from complex mixtures.
DOI：
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发表时间：
1983
期刊：
影响因子：
--
作者：
A. Myerson;S. Gaines
通讯作者：
S. Gaines