循环萃取耦合电解策略绿色合成高浓度对苯二酚

doi:10.6023/cjoc202504016

有机化学 ›› 2025, Vol. 45 ›› Issue (12): 4384-4389.DOI: 10.6023/cjoc202504016 上一篇下一篇

研究论文

循环萃取耦合电解策略绿色合成高浓度对苯二酚

夏泽豪, 张新胜, 钮东方^*()

华东理工大学化工学院上海 200237

收稿日期:2025-04-15 修回日期:2025-06-12 发布日期:2025-07-25
通讯作者: 钮东方
基金资助:
国家自然科学基金(21972042)

A Strategy of Cyclic Extraction Coupled with Electrolysis for Green Synthesis of High-Concentration Hydroquinone

Zehao Xia, Xinsheng Zhang, Dongfang Niu^*()

School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237

Received:2025-04-15 Revised:2025-06-12 Published:2025-07-25
Contact: Dongfang Niu
Supported by:
National Natural Science Foundation of China(21972042)

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摘要/Abstract

本研究开发了一种循环萃取耦合电解策略, 通过阳极氧化苯酚生成对苯醌, 经氯苯萃取后阴极还原, 实现高浓度对苯二酚的绿色合成. 在优化后的电解参数条件下, 对苯二酚总产率为68.03%, 氯苯作为萃取剂可兼顾对苯醌的高效分离和电解液的可循环使用, 阳极液循环使用5次后, 对苯醌产率保持73%左右, 阴极液循环使用4次后, 对苯二酚浓度提高了4.6倍, 由4.68 g/L提升至21.51 g/L. 该方法保证了阴、阳极液的可循环使用性, 并制得了高浓度对苯二酚, 为对苯二酚绿色合成提供了工业化可行方案.

关键词: 苯酚电氧化, 高浓度对苯二酚, 循环萃取, 电解液循环使用

A cyclic extraction-coupled electrolysis strategy was developed for the green synthesis of high-concentration hydroquinone (HQ). p-Benzoquinone (BQ) was first generated via anodic oxidation of phenol, subsequently extracted by chlorobenzene, and finally reduced at the cathode. Under the optimized electrolytic parameters, the total yield of hydroquinone was 68.03%. Chlorobenzene, as the extractant, could balance the efficient separation of p-benzoquinone and the recyclability of the electrolyte. After the anode liquid was recycled 5 times, the yield of p-benzoquinone remained at about 73%, and after the cathode liquid was recycled 4 times, the concentration of hydroquinone increased by 4.6 times. It increased from 4.68 g/L to 21.51 g/L. This method ensures the recyclability of both anodic and cathodic electrolytes while achieving a high hydro- quinone concentration, thereby offering an industrially feasible approach for the green synthesis of hydroquinone.

Key words: electrochemical oxidation of phenol, high-concentration hydroquinone, cyclic extraction, electrolyte recycling

引用此文

夏泽豪, 张新胜, 钮东方. 循环萃取耦合电解策略绿色合成高浓度对苯二酚[J]. 有机化学, 2025, 45(12): 4384-4389.

Zehao Xia, Xinsheng Zhang, Dongfang Niu. A Strategy of Cyclic Extraction Coupled with Electrolysis for Green Synthesis of High-Concentration Hydroquinone[J]. Chinese Journal of Organic Chemistry, 2025, 45(12): 4384-4389.

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图/表 8

图式1. 高浓度对苯二酚的电化学合成

Scheme 1. Electrochemical synthesis of high-concentration hy- droquinone

图1. 不同萃取剂对对苯醌的萃取效率

Figure 1. Extraction efficiency of different extractants for p-benzoquinone

图2. 氯苯用量对萃取效率的影响

Figure 2. Effect of chlorobenzene dosage on extraction efficiency

图3. 通电量对对苯醌产率和电流效率的影响

Figure 3. Effect of electrical charge on the yield and current efficiency of p-benzoquinone

Electricity quantity/(F•mol^－1)	Yield_HQ^b/%	EF_HQ^c/%
3.0	93.67	61.95
3.8	96.76	52.36
4.5	96.63	44.24

表1. 通电量对对苯二酚产率和电流效率的影响

Table 1. Effect of electrical charge on the yield and current efficiency of hydroquinone

图式2. 苯酚电合成对苯二酚的反应路径

Scheme 2. Reaction pathway for the electrosynthesis of hydroquinone from phenol

图4. 阳极液循环使用次数对对苯醌产率的影响

Figure 4. Effect of anolyte recycling times on the yield of p-benzoquinone

图5. 阴极液循环使用次数对对苯醌萃取效率、对苯二酚浓度的影响

Figure 5. Effect of catholyte recycling times on the extraction efficiency of p-benzoquinone and hydroquinone concentration

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循环萃取耦合电解策略绿色合成高浓度对苯二酚

A Strategy of Cyclic Extraction Coupled with Electrolysis for Green Synthesis of High-Concentration Hydroquinone

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