Catalytic conversion of ethyl lactate to 1,2-propanediol over CuO

Zhang, Song; Huo, Zhibao; Ren, Dezhang; Luo, Jiang; Fu, Jun; Li, Lu; Jin, Fangming

doi:10.1016/j.cjche.2015.06.006

Cited by 11 publications

(8 citation statements)

References 21 publications

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“…The addition of some additives such as boron, tin, and iron to Ru-based catalysts has been reported in the literature [265]. Feng et al [266] hydrogenated ethyl lactate with Ru catalysts over TiO 2 , SiO 2 , Al 2 O 3 , NaY, and active carbon and found Ru/SiO 2 to be an effective catalyst [266][267][268]. Xu et al [264] tested the Co/SiO 2 catalyst for liquid-phase hydrogenation of ethyl lactate.…”

Section: Lactic Acid (La)mentioning

confidence: 99%

Bio-Based Chemicals from Renewable Biomass for Integrated Biorefineries

2019

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The production of chemicals from biomass, a renewable feedstock, is highly desirable in replacing petrochemicals to make biorefineries more economical. The best approach to compete with fossil-based refineries is the upgradation of biomass in integrated biorefineries. The integrated biorefineries employed various biomass feedstocks and conversion technologies to produce biofuels and bio-based chemicals. Bio-based chemicals can help to replace a large fraction of industrial chemicals and materials from fossil resources. Biomass-derived chemicals, such as 5-hydroxymethylfurfural (5-HMF), levulinic acid, furfurals, sugar alcohols, lactic acid, succinic acid, and phenols, are considered platform chemicals. These platform chemicals can be further used for the production of a variety of important chemicals on an industrial scale. However, current industrial production relies on relatively old and inefficient strategies and low production yields, which have decreased their competitiveness with fossil-based alternatives. The aim of the presented review is to provide a survey of past and current strategies used to achieve a sustainable conversion of biomass to platform chemicals. This review provides an overview of the chemicals obtained, based on the major components of lignocellulosic biomass, sugars, and lignin. First, important platform chemicals derived from the catalytic conversion of biomass were outlined. Later, the targeted chemicals that can be potentially manufactured from the starting or platform materials were discussed in detail. Despite significant advances, however, low yields, complex multistep synthesis processes, difficulties in purification, high costs, and the deactivation of catalysts are still hurdles for large-scale competitive biorefineries. These challenges could be overcome by single-step catalytic conversions using highly efficient and selective catalysts and exploring purification and separation technologies.

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Section: Lactic Acid (La)mentioning

confidence: 99%

Bio-Based Chemicals from Renewable Biomass for Integrated Biorefineries

2019

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“…1,2-PG is a colorless viscous liquid with good chemical stability and various applications. It is a polyol compound with certain hygroscopicity and is widely used as solvent, antifreeze, deicing agent, and humidifier in the food industry [ 24 , 25 ]. The addition of 1,2-PG to foods can retain a certain amount of moisture, meanwhile it does not increase the water activity, so it is often used as a lubricant to improve the sensory qualities of food [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

“…As far as we know, more than 40 chiral compounds have been inves alcoholic beverages, including five alcohols, such as 2,3-butanediol [19,20], 2 butanol [21,22], 1-phenylethanol [23], 2-butanol [19], and 1,2-PG [18]. The 1,2asymmetric chiral carbon atom with two different enantiomers (as in Figure 1) a colorless viscous liquid with good chemical stability and various applicati polyol compound with certain hygroscopicity and is widely used as solvent, deicing agent, and humidifier in the food industry [24,25]. The addition of 1,2-P can retain a certain amount of moisture, meanwhile it does not increase the wat so it is often used as a lubricant to improve the sensory qualities of food [26].…”

Section: Introductionmentioning

confidence: 99%

Distribution and Quantification of 1,2-Propylene Glycol Enantiomers in Baijiu

Dai

Qiu

et al. 2021

Foods

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Enantiomers of 1,2-Propylene glycol (1,2-PG) were investigated in 64 commercial Chinese Baijiu including soy sauce aroma-type Baijiu (SSB), strong aroma-type Baijiu (STB), and light aroma-type Baijiu (LTB), via chiral gas chromatography (β-cyclodextrin). The natural enantiomeric distribution and concentration of 1,2-PG in various baijiu were studied to evaluate whether the distribution and content of the two isomers of 1,2-PG were correlated with the aroma type and storage year. The results showed that 1,2-PG has a high enantiomeric ratio and the (S)-configuration predominated in SSB. The average S/R enantiomeric ratio of this compound in SSB was approximately 87:13 (±3.17), with an average concentration of 52.77 (±23.70) mg/L for the (S)-configuration and 8.72 (±3.63) mg/L for the (R)-enantiomer. The (R)-configuration was predominant in the STB, whereas neither (S) nor (R)-form of 1,2-PG were detected in LTB. The content of the two configurations of 1,2-PG in the JSHSJ vintage of SSB showed a wave variation, with an average S/R enantiomeric ratio of 89:11 (±1.15). The concentration of (R)-1,2-PG in XJCTJ vintage liquors showed an upward and then downward trend with aging time, with an overall downward trend, and the concentration of (S)-form showed a wavy change with an overall upward trend. Except for the LZLJ-2019 vintage where both (R) and (S)-1,2-PG were present, all other samples only existed (R)-form, and a decreasing trend of (R)-enantiomer with aging time was observed. The enantiomeric ratio of 1,2-PG might be one of the potential markers for adulteration control of Baijiu as industrial 1,2-PG usually presented in the racemic mixture. Sensory analysis revealed olfactory thresholds of 4.66 mg/L and 23.92 mg/L for the (R)- and (S)-configurations in pure water respectively. GC-O showed both enantiomers exhibited different aromatic nuances.

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“…In our previous studies, we had accumulated rich experience on the utilization of biomass resource − for the synthesis of a series of high-value chemicals and fuels. Herein, we report a green catalytic process for the esterification of SA into DMS in methanol over ZnO.…”

Section: Introductionmentioning

confidence: 99%

“…In this process, ZnO could be dissolved and regenerated during the reaction, and the regenerated ZnO could be collected and reused, which radically avoid the deactivation problem of heterogeneous catalyst. In addition, ZnO is also a low cost, commercially available and environmentally friendly material. , The main strategy is illustrated in Scheme .…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Dimethyl Succinate via Esterification of Succinic Anhydride over ZnO in Methanol

Wan

Ren

Liu

et al. 2018

ACS Sustainable Chem. Eng.

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An efficient esterification of succinic anhydride (SA) to dimethyl succinate (DMS) using ZnO in methanol was investigated for the first time. ZnO is commercial, low cost, noncorrosive and environmentally friendly metallic oxide and can promote remarkably the production of DMS from SA in excellent yields with high selectivity. The highest yield of DMS of 100% was achieved at the temperature of 140 °C for 10 h. The results indicated that reaction temperature and time had significant influences on the yield of DMS. Mechanism study found that ZnO was first dissolved to form a Zn species, and then redeposited to ZnO during the reaction, which was crucial for SA conversion. The redeposited ZnO could be reused at least 4 times without the loss of the activity. Moreover, the reaction of ethanol and SA was also effective to give excellent yield at the optimal conditions. The present study demonstrates a promising greener way for the synthesis of DMS from biomass-derived SA.

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Catalytic conversion of ethyl lactate to 1,2-propanediol over CuO

Cited by 11 publications

References 21 publications

Bio-Based Chemicals from Renewable Biomass for Integrated Biorefineries

Bio-Based Chemicals from Renewable Biomass for Integrated Biorefineries

Distribution and Quantification of 1,2-Propylene Glycol Enantiomers in Baijiu

Facile Synthesis of Dimethyl Succinate via Esterification of Succinic Anhydride over ZnO in Methanol

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