Selective adsorption and separation of salicylic acid and 4‐hydroxyisophthalic acid from industry‐grade 4‐hydroxybenzoic acid on UiO‐66

IF 1.4 4区工程技术 Q3 ENGINEERING, CHEMICAL

Asia-Pacific Journal of Chemical Engineering Pub Date : 2024-05-22 DOI:10.1002/apj.3103

Kai Yuan, Ye Sun, Yangfeng Peng, Yongming Wei, Yanyang Wu, Quan He

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引用次数: 0

Abstract

In this study, UiO‐66 was employed for the first time as an adsorbent to separate phenolic acid analogues, specifically 4‐hydroxyisophthalic acid and salicylic acid, from impurities. Synthesized in‐house, UiO‐66 was shown to exhibit high selectivity towards 4‐HIPA/4‐HBA and SA/4‐HBA when a molar equivalent of acetic acid modulator to terephthalic acid was set at 44. The adsorption capacities for 4‐HBA, 4‐HIPA, and SA were determined to be 56.34, 55.02, and 60.34 mg/g, respectively. Furthermore, it was observed that after six regeneration cycles, the adsorption capacity for 4‐HBA remained nearly unchanged, whereas those for 4‐HIPA and SA decreased by 5.6% and 2.6%, respectively. FTIR and XPS analyses revealed that all three compounds were adsorbed at the same dominant Zr cluster site on UiO‐66, primarily through hydrogen bonding and electrostatic interaction. Dynamic adsorption experiments revealed that 4‐HBA was the first to elute, maintaining the residual contents of 4‐HIPA and SA below 0.1 wt%. Compared to traditional separation techniques, this paper provided a simple and effective method to purify industrial grade 4‐hydroxybenzoic acid.

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在 UiO-66 上选择性吸附和分离工业级对羟基苯甲酸中的水杨酸和对羟基间苯二甲酸

本研究首次将 UiO-66 用作吸附剂，用于从杂质中分离酚酸类似物，特别是 4- 羟基间苯二甲酸和水杨酸。UiO-66 由内部合成，当醋酸调节剂与对苯二甲酸的摩尔当量设定为 44 时，UiO-66 对 4-HIPA/4-HBA 和 SA/4-HBA 具有高选择性。对 4-HBA、4-HIPA 和 SA 的吸附容量分别为 56.34、55.02 和 60.34 mg/g。此外，经过六个再生周期后，4-HBA 的吸附容量几乎保持不变，而 4-HIPA 和 SA 的吸附容量则分别下降了 5.6% 和 2.6%。傅立叶变换红外光谱（FTIR）和 XPS 分析表明，这三种化合物主要通过氢键和静电作用吸附在 UiO-66 上相同的主要 Zr 团簇位点上。动态吸附实验表明，4-HBA 最先洗脱，从而使 4-HIPA 和 SA 的残余含量保持在 0.1 wt% 以下。与传统分离技术相比，本文提供了一种简单有效的方法来提纯工业级对羟基苯甲酸。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Asia-Pacific Journal of Chemical Engineering ENGINEERING, CHEMICAL-

自引率

11.10%

发文量

111

期刊介绍： Asia-Pacific Journal of Chemical Engineering is aimed at capturing current developments and initiatives in chemical engineering related and specialised areas. Publishing six issues each year, the journal showcases innovative technological developments, providing an opportunity for technology transfer and collaboration. Asia-Pacific Journal of Chemical Engineering will focus particular attention on the key areas of: Process Application (separation, polymer, catalysis, nanotechnology, electrochemistry, nuclear technology); Energy and Environmental Technology (materials for energy storage and conversion, coal gasification, gas liquefaction, air pollution control, water treatment, waste utilization and management, nuclear waste remediation); and Biochemical Engineering (including targeted drug delivery applications).