Towards the sustainable production of pyridines via thermo-catalytic conversion of glycerol with ammonia over zeolite catalysts

2015 ◽  
Vol 17 (4) ◽  
pp. 2426-2435 ◽  
Author(s):  
Lujiang Xu ◽  
Zheng Han ◽  
Qian Yao ◽  
Jin Deng ◽  
Ying Zhang ◽  
...  
Keyword(s):  
High Selectivity ◽  
Catalytic Conversion ◽  
Sustainable Production ◽  
Zeolite Catalysts ◽  
High Yield

Thermo-catalytic conversion of renewable glycerol with ammonia over HZSM-5 for producing pyridines with high yield and high selectivity.

4-Hydroxy Pyridinium Triflate@SiO2 Nanoparticles as a Novel Efficient Catalyst for Fries Rearrangement of Aryl Esters with High Selectivity

2020 ◽  
Vol 17 (8) ◽  
pp. 654-660
Author(s):  
Shermineh Sadat Ghalehbandi ◽  
Dadkhoda Ghazanfari ◽  
Sayed Ali Ahmadi ◽  
Enayatollah Sheikhhosseini
Keyword(s):  
High Selectivity ◽  
Sio2 Nanoparticles ◽  
High Yield ◽  
Synthetic Method ◽  
Functionalized Silica ◽  
Efficient Catalyst ◽  
Fries Rearrangement ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Work Up

Introduction: We developed a simple, fast and new method for the Fries rearrangement of aryl esters. Materials and Methods: 4-Hydroxy pyridinium triflate functionalized silica is a very efficient, reusable and economically available catalyst for the Fries rearrangement in solvent-free condition and under microwave irradiation. Results and Discussion: Also, a notable selectivity was observed in the presence of 4-hydroxy pyridinium triflate functionalized silica. Conclusion: Selectivity, shorter reaction time, high yield, and easy work-up are advantages of this synthetic method.

Selection of high-quality sperm with thousands of parallel channels

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Mohammad Simchi ◽  
Jason Riordon ◽  
Jae Bem You ◽  
Yihe Wang ◽  
Sa Xiao ◽  
...  
Keyword(s):  
Clinical Practice ◽  
High Selectivity ◽  
High Yield ◽  
Sperm Selection ◽  
High Quality ◽  
Parallel Channels ◽  
Selection Of

A 3D-structured sperm selection device is presented that achieves both high selectivity and high yield via thousands of parallel channels. The device significantly outperforms the best clinical practice by selecting ∼100 000 of higher-quality sperm.

Eco-Friendly Synthesis of Sulphonic Acid Oxime Esters Catalyzed by 2-(1H-Benzotriazole-1-yl)-1,1,3,3-Tetramethyluronium Tetrafluoroborate

2014 ◽  
Vol 525 ◽  
pp. 93-96
Author(s):  
Wei Shi ◽  
Ji Ming Zhang ◽  
Jian Hua Zhou ◽  
Jian Hua Zhou ◽  
Song Song Ding
Keyword(s):  
High Selectivity ◽  
Sulphonic Acid ◽  
Present Approach ◽  
High Yield ◽  
Facile Synthesis ◽  
Reaction Duration ◽  
Mild Conditions ◽  
Environmental Friendly

Herein we describle a facile synthesis of sulphonic acid oxime esters in acetonitrile from the corresponding sulphonic acids and oximes catalyzed by the environmental friendly 2-(1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TBTU) in the presence of triethylamine (TEA) under mild conditions. The present approach offers the advantages of a clean reaction, simple methodology, employing readily available catalyst, short reaction duration, high selectivity and high yield.

Catalytic conversion of methane to methanol on Cu-SSZ-13 using N2O as oxidant

2016 ◽  
Vol 52 (91) ◽  
pp. 13401-13404 ◽  
Author(s):  
B. Ipek ◽  
R. F. Lobo
Keyword(s):  
Catalytic Conversion ◽  
Zeolite Catalysts ◽  
Methanol Production ◽  
Conversion Of Methane

Direct catalytic methanol production from methane is achieved on Cu-SSZ-13 zeolite catalysts using N2O as the oxidant.

Catalytic conversion of light alkanes to aromatics by metal-containing HZSM-5 zeolite catalysts—A review

2021 ◽  
Vol 216 ◽  
pp. 106770
Author(s):  
Dongyang Liu ◽  
Liyuan Cao ◽  
Guohao Zhang ◽  
Liang Zhao ◽  
Jinsen Gao ◽  
...  
Keyword(s):  
Catalytic Conversion ◽  
Zeolite Catalysts ◽  
Light Alkanes

One-pot catalytic conversion of microalgae (Chlorococcum sp.) into 5-hydroxymethylfurfural over the commercial H-ZSM-5 zeolite

2016 ◽  
Vol 18 (2) ◽  
pp. 452-460 ◽  
Author(s):  
J. J. Wang ◽  
Z. C. Tan ◽  
C. C. Zhu ◽  
G. Miao ◽  
L. Z. Kong ◽  
...  
Keyword(s):  
Catalytic Conversion ◽  
Experimental Results ◽  
High Yield ◽  
One Pot ◽  
Mild Conditions ◽  
Zeolite P

A high yield of HMF is directly obtained from aquatic microalgae over a commercial acidic zeolite under mild conditions. Experimental results reveal that proteins and lipids in microalgal cells benefit the HMF stability in water.

A Review: Extraction of Platinum Spent Catalyst Using Palm Oil Leaf as Reducing Agent

2015 ◽  
Vol 1113 ◽  
pp. 317-321
Author(s):  
Mohd Rashwan Taufiq Khairol Anwar ◽  
Norashikin Ahmad Zamanhuri ◽  
Junaidah Jai ◽  
Noorsuhana Mohd Yusof
Keyword(s):  
Palm Oil ◽  
High Stability ◽  
High Selectivity ◽  
Reducing Agent ◽  
High Yield ◽  
Spent Catalyst ◽  
Recovery Method ◽  
Paper Review ◽  
Better Than

Platinum is commercially used in the catalytic industry for ages. The use of platinum has been significantly practiced because of its enhancing properties. There are a few advantages of using platinum such as high selectivity, high yield, high stability and able to undergo improvisation. However, when platinum lifetime is out, it is treated mainly as waste. Low recovery of platinum spent catalyst brought to the existence of recovery method using acidic and alkaline method. Proved to be harmful, green subtances were used as substitute for the chemical in recovering platinum. Therefore, a cheaper, safer and more environmentally method of recovery. Thus,this paper review about recovering platinum using palm oil leaf and how it is better than the existed chemical based method.

Studies on the Immobilized-Lipase-Catalyzed Esterification of Alkyl Oleates in Solvent-Free Systems

2013 ◽  
Vol 645 ◽  
pp. 19-23 ◽  
Author(s):  
Hui Zhong ◽  
Zheng Fang ◽  
Bao Hua Zou ◽  
Xin Li ◽  
Kai Guo
Keyword(s):  
Oleic Acid ◽  
Low Temperature ◽  
High Selectivity ◽  
Immobilized Lipase ◽  
Enzyme Concentration ◽  
Molar Ratio ◽  
High Yield ◽  
Secondary Alcohols ◽  
Tertiary Alcohols ◽  
Candida Sp

The esterification of oleic acid with alkyl alcohols in solv ent-free systems was catalyzed by an immobilized lipase from Candida sp . 99-125. The influence of several factors, including enzyme concentration, temperature, molar ratio between oleic acid and alkyl alcohols, and structure of alcohol was also investigated. The results indicated that the reactions catalyzed by lipase at 20 o C, in the presence of 3% (w/w) lipase, on the molar ratio of 1:1 between oleic acid and alcohols, afforded products in high yield. It showed high selectivity to primary and low selectivity to secondary alcohols and tertiary alcohols because of the sterically hindered effect. Methanol has certain toxicity on the activity of the lipase. The lipase from Candida sp. 99-125 was identified to be an effective catalyst in the esterification of alcohol and oleic acid at low temperature.

scholarly journals Catalytic conversion of methanol/ethanol to isobutanol – a highly selective route to an advanced biofuel

2016 ◽  
Vol 52 (29) ◽  
pp. 5202-5204 ◽  
Author(s):  
Richard L. Wingad ◽  
Emilie J. E. Bergström ◽  
Matthew Everett ◽  
Katy J. Pellow ◽  
Duncan F. Wass
Keyword(s):  
High Selectivity ◽  
Catalytic Conversion ◽  
Advanced Biofuel

Catalysts based on ruthenium diphosphine complexes convert methanol/ethanol mixtures to the advanced biofuel isobutanol, with extremely high selectivity (>99%) at good (>75%) conversion via a Guerbet-type mechanism.

Continuous two-step catalytic conversion of glycerol to pyridine bases in high yield

2019 ◽  
Vol 319 ◽  
pp. 220-228 ◽  
Author(s):  
Yuecheng Zhang ◽  
Wanyu Zhang ◽  
Hong-Yu Zhang ◽  
Guohui Yin ◽  
Jiquan Zhao
Keyword(s):  
Catalytic Conversion ◽  
High Yield ◽  
Pyridine Bases
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