Study on zinc oxide‐creatinine hybrid catalyst for efficient lactide synthesis with low racemization

Tian, Guiying; Wang, Huiqing; Song, Yuanyuan; Xiang, Jun; Ying, Yiran; Han, Xurui; Wang, Songbo; Zhang, Lei; Zhang, Jianping; Tang, Na

doi:10.1002/app.53762

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…22 The preparation of PLA through direct melt polycondensation of lactic acid primarily focuses on optimizing the polymerization reaction and improving the process conditions. 23,24 Furthermore, the activity of the catalyst significantly influences the molecular weight and yield of PLA synthesis. Among the range of catalysts, tin-based catalysts are typically employed in PLA synthesis, owing to their high catalytic activity and exceptional selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Poly(lactic acid) synthesized from non‐food biomass feedstocks with tin‐loaded ZA molecular sieve catalysts by direct melt polycondensation

Gao,

Wang,

Yang

et al. 2023

Polymer International

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The design and synthesis of catalysts loaded with active components has attracted considerable attention in current research owing to their exceptional catalytic performance. In this study, the focus was on the utilization of tin‐loaded ZA molecular sieves, possessing remarkable adsorption properties, alongside the catalytic activity of tin. These catalysts were successfully prepared and employed for the synthesis of poly(lactic acid) (PLA) from lactic acid derived from non‐food biomass. By modifying the treatment of ZA molecular sieves, the properties of tin‐loaded ZA molecular sieves were adjusted. The resulting catalysts exhibited a high tin capacity ranging from 2.29% to 2.81% and featured abundant mesoporous structures, providing a surface area of up to 341.2 m2 g−1. Regarding the preparation of PLA, our findings demonstrated that ZA‐III‐Sn2+ as a catalyst yielded PLA with a higher weight‐average molecular weight (Mw) up to 2.57 × 104 g mol−1 and a higher yield of 65.3% compared to other catalysts. Moreover, the most optimal catalytic effect was achieved by adding the catalyst in three separate stages. Moreover, the amount of catalyst, reaction temperature and reaction time were found to influence both the molecular weight and yield of PLA. This study not only provides a valuable strategy for the preparation of loaded catalysts for PLA production but also offers new insights into the overall preparation process of PLA. © 2023 Society of Industrial Chemistry.

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Section: Introductionmentioning

confidence: 99%

“…The preparation of PLA through direct melt polycondensation of lactic acid primarily focuses on optimizing the polymerization reaction and improving the process conditions 23,24 . Furthermore, the activity of the catalyst significantly influences the molecular weight and yield of PLA synthesis.…”

Section: Introductionmentioning

confidence: 99%

Poly(lactic acid) synthesized from non‐food biomass feedstocks with tin‐loaded ZA molecular sieve catalysts by direct melt polycondensation

Gao,

Wang,

Yang

et al. 2023

Polymer International

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Efficient Synthesis of Lactide with Low Racemization Catalyzed by Zinc Lactate and Creatinine and Polycondensation Kinetics

Zhang,

Wei,

Yan

et al. 2024

Ind. Eng. Chem. Res.

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L-Lactide is an important intermediate for the industrial production of polylactic acid (PLA). However, several serious issues still remain to be solved, including low yield and low purity induced by racemization. In this work, we developed a new catalytic system of zinc lactate (Zn(La) 2 ) and creatinine (CR) for lactide synthesis. At a depolymerization cyclization temperature of 240 °C, the yield of crude lactide reaches 98.12%, and after purification, the yield of L-lactide reaches 77.09% with a purity of up to 98.00%. Furthermore, a second-order pseudo-homogeneous kinetic model was established for the polycondensation process, and the model fitting was in good agreement with experimental data in the temperature range of 393.15 to 423.15 K.

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Study on zinc oxide‐creatinine hybrid catalyst for efficient lactide synthesis with low racemization

Cited by 2 publications

References 34 publications

Poly(lactic acid) synthesized from non‐food biomass feedstocks with tin‐loaded ZA molecular sieve catalysts by direct melt polycondensation

Poly(lactic acid) synthesized from non‐food biomass feedstocks with tin‐loaded ZA molecular sieve catalysts by direct melt polycondensation

Efficient Synthesis of Lactide with Low Racemization Catalyzed by Zinc Lactate and Creatinine and Polycondensation Kinetics

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