Selective conversion of lactic acid to acrylic acid over alkali and alkaline-earth metal co-modified NaY zeolites

Zhang, Li Li; Theng, De Sheng; Du, Yonghua; Xi, Shibo; Huang, Lin; Gao, Feng; Wang, Chuan; Chen, Luwei; Borgna, Armando

doi:10.1039/c7cy02142a

Cited by 33 publications

(39 citation statements)

References 37 publications

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“…In contrast to these results, a negative impact of secondary mesoporization on stability and reusability of the catalyst has been shown by Zhang et al. for KOH−Ca‐NaY catalysts . According to these authors, the formation of the defects during alkaline treatment affects the hydrothermal stability of the catalyst and causes a loss of crystallinity and redistribution of active sites via formation of CaCO 3 and amorphous Na−Ca aluminosilicates.…”

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 92%

“…High performance of modified NaY zeolite was reported by Zhang et al. using multicomponent KOH−Ca/NaY catalyst yielding up to 84 % of AA at 100 % LA conversion (Table , entry 5) . The sequential modification of NaY, first with calcium nitrate and then with KOH led to a significant reduction of both acidity and basicity of the catalyst, which are, according to the authors, key for a high catalytic performance.…”

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

“…It has been mentioned by several authors that the high activity and selectivity of Y catalysts are not stable and rapidly decreases in reaction time ,,,,. Although impregnation with potassium salts or Na 2 HPO 4 increases the stability of catalyst compared to that of the parent NaY, the selectivity to AA drops significantly by 20–30 % already after 5–6 h on stream ,.…”

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

“…The increased stability was explained by steric factors; presence of bigger cations such as K and Cs (in contrast to the smaller Na and Li) hinders the blockage of the pores by large organic deposits of acidic nature (most probably lactic and/or acrylic oligomers). Much better stabilities were demonstrated over KOH−Ca‐NaY catalyst with the AA yield only gradually decreasing from 84 % to 64 % within 30 h on time‐on‐stream …”

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

“…In order to overcome the catalyst stability problem, addition of secondary mesoporous pore system has been attempted to facilitate the molecular transport within the pores ,,. A significant improvement of stability was demonstrated by Lari et al.…”

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

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Bio‐Acrylates Production: Recent Catalytic Advances and Perspectives of the Use of Lactic Acid and Their Derivates

et al. 2018

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The production of drop‐in chemicals from bio‐based renewable sources is gaining a lot of momentum due to proven negative impact of fossil‐based economy on environment and society. In this Review, various bio‐derived platform molecules are assessed as renewable alternatives to fossil resources for the catalytic production of acrylates. Acrylic acid and its esters are key building blocks of a large number of high‐value oligomers and polymers in the current industry. In spite of the encouraging successes reported on gram or lab‐scale, real implementation of bio‐based examples remain scarce mainly due to the current high cost and limited availability of the bio‐based substrates. As lactic acid and their derivatives are one of the most promising feedstocks for bio‐acrylate production, they are the main focus of this Review.

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Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 92%

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

Section: Chemical Routes Of Acrylic Acidmentioning

confidence: 99%

See 3 more Smart Citations

Bio‐Acrylates Production: Recent Catalytic Advances and Perspectives of the Use of Lactic Acid and Their Derivates

et al. 2018

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Design Strategies for Hydroxyapatite‐Based Materials to Enhance Their Catalytic Performance and Applicability

et al. 2023

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Hydroxyapatite (HAP) is a green catalyst that has a wide range of applications in catalysis due to its high flexibility and multifunctionality. These properties allow HAP to accommodate a large number of catalyst modifications that can selectively improve the catalytic performance in target reactions. To date, many studies have been conducted to elucidate the effect of HAP modification on the catalytic activities for various reactions. However, systematic design strategies for HAP catalysts are not established yet due to an incomplete understanding of underlying structure–activity relationships. In this review, tuning methods of HAP for improving the catalytic performance are discussed: 1) ionic composition change, 2) morphology control, 3) incorporation of other metal species, and 4) catalytic support engineering. Detailed mechanisms and effects of structural modulations on the catalytic performances for attaining the design insights of HAP catalysts are investigated. In addition, computational studies to understand catalytic reactions on HAP materials are also introduced. Finally, important areas for future research are highlighted.

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Highly Selective Synthesis of Acrylic Acid from Lactide in the Liquid Phase

et al. 2018

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A new reaction system for the highly selective, hydrobromic acid catalyzed conversion of lactide into acrylic acid under mild conditions is reported. The applied liquid reaction system consists of a temperature-stable bromide-containing ionic liquid and 2-bromopropionic acid as a source of dry HBr, with no volatile organic solvent being used. This allows for the in situ removal of the formed acrylic acid, leading to an unmatched acrylic acid selectivity of over 72 % at full lactide conversion. Accounting for leftover reaction intermediates on the way to acrylic acid, which could be recycled in an elaborate continuous process, the proposed reaction system shows potential for acrylic acid yields well above 85 % in the liquid phase. This opens new avenues for the effective conversion of biogenic lactic acid (e.g., obtained by fermentation from starch) to acrylic acid. The resulting bio-acrylic acid is a highly attractive product for, for example, the diaper industry, where we expect consumers to be especially sensitive to aspects of sustainability.

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Selective conversion of lactic acid to acrylic acid over alkali and alkaline-earth metal co-modified NaY zeolites

Abstract: A high AA selectivity of 84% was achieved through an environmentally friendly and sustainable catalytic process.

Cited by 33 publications

References 37 publications

Bio‐Acrylates Production: Recent Catalytic Advances and Perspectives of the Use of Lactic Acid and Their Derivates

Bio‐Acrylates Production: Recent Catalytic Advances and Perspectives of the Use of Lactic Acid and Their Derivates

Design Strategies for Hydroxyapatite‐Based Materials to Enhance Their Catalytic Performance and Applicability

Highly Selective Synthesis of Acrylic Acid from Lactide in the Liquid Phase

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