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

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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。

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

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.