Extraction of rhodium from supported liquid-phase hydroformylation catalysts with supercritical carbon dioxide

IF 7.2 2区 工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY Journal of CO2 Utilization Pub Date : 2024-10-28 DOI:10.1016/j.jcou.2024.102968
Mahtab Madani , Leonhard Schill , Blete Hulaj , Jakob Willner , Andreas Limbeck , Katharina Bica-Schröder , Rasmus Fehrmann , Anders Riisager
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Abstract

The continuous extraction of the rhodium inventory in supported liquid-phase (SLP) catalytic materials utilized in the hydroformylation (HyFo) of 1-butene was investigated by supercritical carbon dioxide (scCO2). Optimization of extraction efficiency involved varying parameters such as temperature (90 and 120 °C), pressure (10, 20 and 30 MPa), and the addition of methanol as a polar co-feed to the extraction medium (0–20 vol%). The results underscored the critical role of methanol in facilitating extraction, as experiments employing pure scCO2 yielded no rhodium recovery. Furthermore, extraction performance demonstrated sensitivity to temperature and pressure adjustments during the process. Notably, the use of 10 vol% methanol at 120 °C and 30 MPa achieved complete rhodium extraction from the grained SLP materials, which was identified as the optimum extraction condition. This study highlights the potential for scaling up in-situ rhodium extraction processes within HyFo production plants based on SLP catalysts, emphasizing significant implications for industrial applications.
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用超临界二氧化碳萃取支撑液相加氢甲酰化催化剂中的铑
研究人员利用超临界二氧化碳(scCO2)对用于 1-丁烯加氢甲酰化(HyFo)的支撑液相(SLP)催化材料中的铑库存进行了连续萃取。萃取效率的优化涉及不同的参数,如温度(90 和 120 °C)、压力(10、20 和 30 兆帕),以及在萃取介质中加入极性辅料甲醇(0-20 vol%)。结果强调了甲醇在促进萃取中的关键作用,因为采用纯 scCO2 的实验没有回收铑。此外,萃取性能还显示出对过程中温度和压力调整的敏感性。值得注意的是,在 120 °C 和 30 MPa 条件下使用 10 Vol% 甲醇可从粒状 SLP 材料中完全萃取出铑,这被确定为最佳萃取条件。这项研究强调了在基于 SLP 催化剂的 HyFo 生产厂内扩大原位萃取铑工艺的潜力,对工业应用具有重要意义。
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来源期刊
Journal of CO2 Utilization
Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL
CiteScore
13.90
自引率
10.40%
发文量
406
审稿时长
2.8 months
期刊介绍: The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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