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Citation: WU Linjuan, ZHU Dajian, XIAO Se, LEI Yizhu, GUO Yuanyuan, ZHANG Panpan, LI Guangxing. Green Process for o-Cersol Carboxylation Using Potassium Phosphate Base[J]. Chinese Journal of Applied Chemistry, ;2015, 32(6): 647-651. doi: 10.11944/j.issn.1000-0518.2015.06.140342 shu

Green Process for o-Cersol Carboxylation Using Potassium Phosphate Base

1.
School of Chemistry & Chemical Engineering, Huazhong University of Science & Technology, Wuhan 430074, China

Corresponding author: LI Guangxing,
Received Date: 9 October 2014
Available Online: 19 January 2015
Fund Project: 国家科技部863项目(NC2010MA0137)资助 (NC2010MA0137)

A green process of the carboxylation reaction of o-cresol with CO₂ using K₃PO₄ as a base was studied for the synthesis of 2-hydroxy-3-methylbenzoic acid(o-MSA) and related carboxylated products.Various reaction parameters such as temperature,pressure,and the ratio of the base to substrate had been tested. The results show that 95.4% total yield of all carboxylated products in this Koble-Schmitt reaction is obtained using K₃PO₄ as a base under 3.0 MPa CO₂ and 150℃. Additionally,no CO₂ is released during the neutralization process following the Koble-Schmitt reaction and the K₃PO₄ can be recovered and recycled by neutralization of KH₂PO₄ with KOH. Therefore,this process allows a green fixation of CO₂.
- carbon dioxide,
- potassium phosphate,
- hydroxy-methylbenzoic acid,
- green synthesis,
- o-cersol
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