GREEN CHEMISTRY
·
2017
·Vol. 19
·期 5
·1308-1314
·
IF 9.125
Zhibao Huo,Jiefeng Xiao,Dezhang Ren,Fangming Jin,Tian Wang,Guodong Yao
A new non-fermentative process for the transformation of biomass carbohydrates and lactic acid (LA) into propionic acid (PA) was first reported over a cobalt catalyst in water. The Co catalyst exhibited high catalytic activity for the formation of PA with Zn as a reductant. Various parameters, such as catalyst loading, Zn weight, water volume, temperature and reaction time, were investigated to improve the yield of PA, and the maximum value of 58.8% was achieved in the presence of 4 mmol Co and 10 mmol Zn in 7.5 mL H2O at 250 °C for 2 h. The recyclability of the Co catalyst showed that Co could be effectively repeated four times without the loss of activity. Moreover, the result showed that in situ-formed ZnO by oxidation of Zn in water could efficiently enhance the catalytic activity of the Co catalyst in the conversion of LA. Besides, direct conversion of carbohydrate biomass, such as glucose, cellulose and starch, or a similar compound such as glycolic acid also afforded the desired products. The present study provides great significance for practical application on the production of PA from LA and biomass carbohydrates.
研究领域:
化学工程
·
可再生能源
·
催化化学
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2017
·
IF 3.33
Bing Li,Luwei Li,Qing Zhang,Weizheng Weng,Huilin Wan
Fructose is generated from glucose isomerization in water over attapulgite without any addition of metal compounds. The formation of fructose was related closely to the calcination processing of attapulgite. The highest fructose yield of 20.6% was obtained with the selectivity of 77.9% over attapulgite calcined at 500 °C. Moreover, attapulgite was characterized by BET, XRD, IR and CO 2 -TPD techniques. The results indicated that proper distribution and amount of basic sites were crucial for the selectivity of fructose as well as the structural properties of attapulgite.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 4
·期 94
·52402-52409
·
IF 3.708
Yong Liu,Lungang Chen,Tiejun Wang,Ying Xu,Qi Zhang,Longlong Ma,Yuhe Liao,Ning Shi
Non-edible cellulose has attracted considerable attention to be converted into valuable platform chemicals. Direct transformation of cellulose to C6 alditols (mannitol and sorbitol) provides a sustainable route. A productive approach is presented in this work using a Ru/C catalyst combined with H+-released boron phosphate in an aqueous phase. A yield of C6 alditols as high as 74.9% with a 91% conversion of cellulose is achieved. By adding silica–alumina materials, the yield of C6 alditols can be improved to 93.5% with complete conversion. The acid sites gradually released from boron phosphate under hydrothermal conditions could promote the hydrolysis of cellulose without significant degradation of glucose. Furthermore, the interaction of boric acid with C6 alditols may form borate–polyol complexes, which can enhance the stability of the C6 alditols to avoid further hydrogenolysis and dehydration of the C6 alditols formed. Due to the adsorption ability of the substrate, the addition of silica–alumina materials with a high content of silica leads to improved performance.
研究领域:
化学工程
·
可再生资源利用
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2011
·Vol. 89
·期 6
·
IF 1.374
ZhuYefeng,WeiYunyang
The copper(I) iodide/1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)piperazine (CuI–L2) system catalyzed the cross-coupling reactions between aryl halides and aqueous ammonia in water to produce primary aromatic amines in good yields. The protocol was simple and efficient, avoiding the need for inert atmosphere, additional base, or other additives.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2013
·
IF 1.304
Ming Jin,Dan Zhao,Guozhen He,Yao Tong,Shiqing Han
An efficient method has been developed for the N -arylation of a variety of water-soluble amino alcohols (1.2 mmol) with aryl iodides (1.0 mmol) in water under CuI-catalyzed conditions. The reaction was conducted via substrate-promoted action and did not require an additional ligand or phase-transfer catalyst, and afforded the desired N -aryl amines in acceptable to excellent yields (64%–93%) under mild reaction conditions with a small excess of the amino alcohol.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Zihao Yin,Wanqing Wei,Wei Song,Jian Wen,Guipeng Hu,Xiaomin Li,Cong Gao,Jia Liu,Jing Wu
Epoxides, a class of ethers with a three-membered ring structure, are widely used in the textile, pharmaceutical, and packaging industries. Chemoenzymatic epoxidation presents a promising method for synthesizing epoxides. However, its epoxidation efficiency is hindered by low chemoselective perhydrolysis, which is caused by the hydrolysis side reaction in the aqueous phase. In this study, a chemoenzymatic epoxidation process in the aqueous phase was developed by utilizing an acyltransferase from P. litoralis (PlAcT) for its chemoselective perhydrolysis. Crystal structure analysis, molecular dynamics simulations, and quantum mechanics calculations, along with site-specific mutagenesis, revealed that the selectivity of perhydrolysis is due to a lower energy barrier in the acyl transfer step compared to that in hydrolysis. Furthermore, the mutant PlAcTM3–2 exhibited a 7.6-fold improvement in solvent stability and a 1.3-fold increase in perhydrolysis activity compared to the wild type, achieved by reshaping interface interactions. As a result, the engineered strain Y07, harboring PlAcTM3–2, successfully synthesized compounds 3a–3n with conversions ranging from 11–99%, and the titers of compounds α-pinene oxide(3i), β-pinene oxide(3j), 3-carene oxide(3k), and limonene dioxide(3l–3) reached 55.8, 16.7, 75.2, and 21.4 g/L, respectively. These results demonstrate a sustainable method for chemoenzymatic epoxidation in the aqueous phase.
研究领域:
生物化学
·
酶工程
·
绿色化学
✓ 已验证
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2013
·Vol. 37
·期 8
·2537-2540
·
IF 2.966
Songbai Liu,Jiahui Zhou
Surfactants have long been underestimated in synthetic organic chemistry despite their great potential in promoting solubility, reactivity and selectivity in metal-mediated cross-couplings. In this study the strategy of surfactant promotion was exemplified in copper-catalyzed N-arylation of indoles in water. The different effects of surfactants during the coupling reaction were first explored. The superior promoting effect of the natural zwitterionic surfactant, betaine, was found and attributed to the capability of the formed complex to stabilize the copper intermediate in the catalytic transformation and facilitate transportation of the reactants. The concept of surfactant promotion through complexation is valuable in metal-mediated cross-couplings. This method also exhibited good recycling ability. This study will greatly facilitate exploration of surfactant promotion in metal-mediated cross-couplings.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
ACS Catalysis
·
2017
·
IF 10.614
Guangyue Xu,Ying Zhang,Yao Fu,Qingxiang Guo
A catalytic system over Ru-HAP catalyst is established to hydrodeoxygenate various oils to long-chain alkanes in water, for potential large-scale renewable diesel production, which has the following advantages. (i) This system is versatile to different oil sources, including Jatropha oil, palm oil, waste cooking oil, and cooking waste. (ii) Ru-HAP is highly efficient at achieving full conversion from stearic acid to alkanes at as low as 100 °C, and the isolated yield from Jatropha oil, palm oil, and waste cooking oil to long-chain alkanes reached up to 95, 96, and 87 mol % at 180 °C and 2 MPa H2 within 4–4.5 h, respectively. (iii) The catalyst showed high stability during five runs of recycling, ICP-OES analysis, and a hydrothermal treatment. The activity decreased less than 5% after the catalyst was treated in water at 200 °C for 24 h with a stirring speed of 1000 rpm due to the strong metal and hydrothermally stable support interaction. (iv) Ru-HAP is compatible with most impurities such as various salts, sugars, and macromolecules. (v) The system required low cost for operation since no dehydration before the reaction was necessary and the alkane product can be easily separated from water. The reaction route was investigated and indicated that the coexisting hydrodehydration and hydrodecarbonylation are affected by water, temperature, and H2 pressure. The catalyst was also characterized in detail, and its high reactivity and stability may result from the fact that highly distributed Ru nanoclusters anchored on the HAP support absorbed fatty acids by forming a metastable calcium carboxyl phosphate.
研究领域:
催化化学
·
可再生能源
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Jinglun Du,Huiling You,Changyan Zhu,Changhua Wang,Xintong Zhang,Yichun Liu
Sustainable nitrogen fixation is essential for advancing agriculture and chemical production. However, existing methods face trade-offs between energy intensity and efficiency. Low-activation-energy approaches fail to dissociate nitrogen effectively due to the strong N2 bond, while energy-intensive methods face energy loss from product decomposition. Here, we present an in-water plasma-based nitrogen fixation system that integrates metal electrodes (W, Al, and Fe) to achieve in situ activation of pulsed discharging plasma. This design enables efficient nitrogen dissociation and selective product formation of soluble nitrogen species (nitrate, nitrite, and ammonia), while minimizing decomposition through optimized product diffusion. This system achieves an energy consumption of 1.14 MJ mol–1 and a production rate of 12.9 mmol h–1 cm–2 for total soluble nitrogen species, surpassing other water-assisted methods and rivaling the Haber–Bosch process. Operating under ambient conditions, this electricity-driven, carbon-neutral approach offers a sustainable and efficient solution for decentralized application in agriculture and chemical production.
研究领域:
农业科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Qin Wang,Dan Luo,Jiansu Ran,Jie Zheng,Yuntong Cui,Ruixue Yangcheng,Shuang Luo,Jianjian Wang
It is highly desirable but of challenge to develop an efficient process for lactic acid (LaA) production from xylose performed in water. Herein, a novel catalyst prepared via a facile solvent-free coordination route is developed to efficiently produce LaA from xylose in water. The structural properties of the prepared catalyst and the reaction conditions are systematically investigated. The production rate of LaA at 190 °C in water is up to 1.8 h −1 , outperforming the most recent reports (below 1.1 h −1 ). Detailed experimental and characteristic studies reveal that the presence of Lewis acidic sites and basic sites in the catalyst structure can not only lower the energy barrier of xylose conversion but also boost the efficient conversion of the active reaction intermediates into LaA. The findings of this work will provide a new approach for the efficient production of LaA from carbohydrates.
研究领域:
化学工程
·
可再生资源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2021
·
IF 7.92
Chaoping Li,Su Liu,Yibing Pi,Jingwen Feng,Zewei Liu,Shiye Li,Rong Tan
High oil/water interfacial area together with accessible interfaces for regents is the key to achieving efficient asymmetric catalysis in water. Herein, by taking advantage of the excellent interfacial activity of Janus nanosheets (JNS), as well as the unique compatibility of imidazolium ionic liquid (IL), we developed a series of IL -functionalized amphiphilic Janus mesosilica nanosheets which afford highly accessible reaction interfaces for highly enantioselective sulfoxidation in water. The JNS-typed chiral salen Ti IV catalysts were prepared by selectively decorating hydrophobic chiral salen Ti IV complex on one side of Janus mesosilica nanosheets through the imidazolium-based IL linker. Benefiting from the two-dimensional porous Janus structure, as well as the compatible IL linker, the IL -tagged JNS catalysts afforded high oil/water interfacial areas and highly accessible reaction interface for sulfides and H 2 O 2 , significantly accelerating asymmetric sulfoxidation in water using H 2 O 2 as an oxidant. In addition, they can be facilely recovered for stable reuse by simple centrifugation.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2016
·
IF 4.312
Ran Ma,Yue-Biao Zhou,Liang-Nian He
A mixture of iron powder and catalytic palladium on activated carbon has been developed for reductive amination of various aromatic aldehydes, including 2-pyridinecarboxaldehyde, in water under CO 2 atmosphere. The reversible reaction of CO 2 with water could form carbonic acid and hydrogen transfer from water to Pd(0) took place with the presence of iron powder, leading to formation of high-active Pd hydrides for the reductive amination process. On the other hand, the reaction system could be inherently neutralized by ready removal of CO 2 , thus resulting in facile post-processing.
研究领域:
有机化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）