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Published on: June 5, 2021
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One-pot two-step process directly converting biomass-derived carbohydrate to lactide.
Lou Gao1, Ke Du1, Tianlan Yan1
1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Collaborative Innovation Centre of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China. zhangyh@fudan.edu.cn.
Chemical Communications (Cambridge, England)
|March 21, 2022
Summary
This study presents a novel biomass conversion strategy for producing lactide with high yield. The process efficiently converts carbohydrates to lactic acid and then to lactide using specialized zeolite catalysts.
Area of Science:
- Chemical Engineering
- Catalysis
- Biomass Conversion
Background:
- Lactide production is crucial for polylactic acid (PLA) synthesis.
- Efficient conversion of biomass-derived carbohydrates to lactide remains a challenge.
- Developing sustainable catalytic routes is essential for green chemistry.
Purpose of the Study:
- To develop an efficient strategy for lactide production from biomass-derived carbohydrates.
- To investigate the catalytic performance of Sn-containing Beta and H-Beta zeolites.
- To characterize the produced lactide and assess substrate applicability.
Main Methods:
- Two-step catalytic conversion: sugar to racemic lactic acid using Sn-Beta zeolite, followed by racemic lactic acid to lactide using H-Beta zeolite.
- Utilized biomass-derived carbohydrates as feedstock.
- Characterization of lactide properties and evaluation of process applicability across various substrates.
Main Results:
- Achieved excellent yields in lactide production from biomass-derived carbohydrates.
- Demonstrated the effectiveness of Sn-Beta and H-Beta zeolites in sequential catalytic steps.
- Confirmed the structural characteristics of the synthesized lactide and its broad applicability.
Conclusions:
- The proposed two-step zeolite-catalyzed strategy offers a high-yield pathway for sustainable lactide production from biomass.
- The catalytic system shows promise for industrial-scale synthesis of lactide.
- The process is adaptable to various carbohydrate feedstocks, highlighting its versatility.
