RuO2–Ru/Hβ zeolite catalyst for high-yield direct conversion of xylose to tetrahydrofurfuryl alcohol

2021 ◽  
Vol 291 ◽  
pp. 120120
Author(s):  
Rizki Insyani ◽  
Amsalia Florence Barus ◽  
Ricky Gunawan ◽  
Jaeyong Park ◽  
Gladys Tiffany Jaya ◽  
...  
Keyword(s):  
Zeolite Catalyst ◽  
Direct Conversion ◽  
High Yield ◽  
Hβ Zeolite

Direct conversion of cellulose to high-yield methyl lactate over Ga-doped Zn/H-nanozeolite Y catalysts in supercritical methanol

2017 ◽  
Vol 19 (8) ◽  
pp. 1969-1982 ◽  
Author(s):  
Deepak Verma ◽  
Rizki Insyani ◽  
Young-Woong Suh ◽  
Seung Min Kim ◽  
Seok Ki Kim ◽  
...  
Keyword(s):  
Lignocellulosic Biomass ◽  
Value Added ◽  
Direct Conversion ◽  
High Yield ◽  
Supercritical Methanol ◽  
Methyl Lactate ◽  
High Yields

For realizing sustainable bio-based refineries, it is crucial to obtain high yields of value-added chemicalsviadirect conversion of cellulose and lignocellulosic biomass.

Unraveling the role of cobalt in the direct conversion of CO2 to high-yield liquid fuels and lube base oil

2021 ◽  
pp. 121041
Author(s):  
Heuntae Jo ◽  
Muhammad Kashif Khan ◽  
Muhammad Irshad ◽  
Malik Waqar Arshad ◽  
Seok Ki Kim ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Liquid Fuels ◽  
High Yield ◽  
Base Oil

scholarly journals Direct conversion of CO2 to aromatics with high yield via a modified Fischer-Tropsch synthesis pathway

2020 ◽  
Vol 269 ◽  
pp. 118792 ◽  
Author(s):  
Yang Wang ◽  
Shun Kazumi ◽  
Weizhe Gao ◽  
Xinhua Gao ◽  
Hangjie Li ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Tropsch Synthesis ◽  
High Yield ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

scholarly journals Nucleic Acid Related Compounds. 8. Direct Conversion of 2′-Deoxyinosine to 6-Chloropurine 2′-Deoxyriboside and Selected 6-Substituted Deoxynucleosides and Their Evaluation As Substrates of Adenosine Deaminase

1973 ◽  
Vol 51 (19) ◽  
pp. 3161-3169 ◽  
Author(s):  
Morris J. Robins ◽  
Gerald L. Basom
Keyword(s):  
Adenosine Deaminase ◽  
Methylene Chloride ◽  
Potassium Fluoride ◽  
Direct Conversion ◽  
Chloride Complex ◽  
High Yield ◽  
Mass Spectral ◽  
Quaternary Ammonium Chloride ◽  
Related Compounds

Trifluoroacetylation of 2′-deoxyinosine (2), obtained by enzymatic deamination of 2′-deoxyadenosine (1), gave the 3′,5′-bis-O-trifluoroacetate (3). Reaction of the electronegatively substituted deoxynucleoside, 3, with DMF-thionyl chloride complex in refluxing methylene chloride gave a high yield of 6-chloropurine 2′-deoxyriboside (4) after deblocking.Displacement of chloride of 4 by hydrosulfide to give 6-mercaptopurine 2′-deoxyriboside (5) followed by sulfur alkylation with p-nitrobenzyl bromide gave 6-S-(p-nitrobenzyl) thiopurine 2′-deoxyriboside (6) which was alternatively prepared by displacement of chloride from 4 by p-nitrobenzyl mercaptide, generated in situ from the isothiouronium salt. Methyl mercaptide reaction with 4 gave 6-methylthiopurine 2′-deoxyriboside (7). Treatment of 4 with trimethylamine gave the corresponding quaternary ammonium chloride (8) which was allowed to react with potassium fluoride to give 6-fluoropurine 2′-deoxyriboside (9). Respective amine displacements on 4 gave 6-benzylaminopurine 2'-deoxyriboside (10), and 6-hydroxylaminopurine 2′-deoxyriboside (11). Reaction of 4 with liquid ammonia completed the first reported transformation of 2′-deoxyinosine (2) to 2′-deoxyadenosine (1).Biological rationale for the synthesis of these 2′-deoxynucleosides and their evaluation as substrates of adenosine deaminase are discussed. Major mass spectral fragmentations are tabulated.

Direct Conversion of Natural Gas to Petrochemicals Using Monofunctional Mo/SiO2and H-ZSM-5 Zeolite Catalysts and Bifunctional Mo/H-ZSM-5 Zeolite Catalyst

2012 ◽  
Vol 30 (9) ◽  
pp. 893-903 ◽  
Author(s):  
A. K. Aboul-Gheit ◽  
A. E. Awadallah ◽  
S. M. Abdel-Hamid ◽  
A. A. Aboul-Enein ◽  
D. S. El-Desouki
Keyword(s):  
Natural Gas ◽  
Zeolite Catalyst ◽  
Direct Conversion ◽  
Zeolite Catalysts

Direct conversion of bio-ethanol to propylene in high yield over the composite of In2O3 and zeolite beta

2017 ◽  
Vol 19 (23) ◽  
pp. 5582-5590 ◽  
Author(s):  
Fangqi Xue ◽  
Changxi Miao ◽  
Yinghong Yue ◽  
Weiming Hua ◽  
Zi Gao
Keyword(s):  
Direct Conversion ◽  
Zeolite Beta ◽  
High Yield ◽  
Propylene Yield

The superior propylene yield of the In2O3-beta composite (ca. 50%) for the conversion of ethanol to propylene compared to In2O3 (ca. 32%) is due to the fact that zeolite beta in the composite enhances the conversion of the intermediate of acetone to propylene via an additional pathway.

scholarly journals An Efficient Synthesis of 1,8-Dioxo-Octahydroxanthenes Derivatives Using Heterogeneous Ce-ZSM-11 Zeolite Catalyst

2018 ◽  
Vol 13 (3) ◽  
pp. 436 ◽  
Author(s):  
Rameshwar R. Magar ◽  
Ganesh T. Pawar ◽  
Sachin P. Gadekar ◽  
Machhindra Karbhari Lande
Keyword(s):  
Zeolite Catalyst ◽  
Bet Surface Area ◽  
High Yield ◽  
Efficient Synthesis ◽  
X Ray Diffraction ◽  
One Pot ◽  
Efficient Catalyst ◽  
Temperature Programmed ◽  
The One ◽  
Work Up

The Ce-ZSM-11 zeolite has been used as an efficient catalyst for the one pot synthesis of 1,8-dioxo-octahydroxanthene derivatives from aromatic aldehyde and 5,5-dimethyl-cyclohexane-1,3-dione under reflux condition. The catalyst was characterized by Powder X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmer-Teller (BET) surface area analysis, and Temperature Programmed Desorption (TPD) techniques. This method provides several advantageous such as use of inexpensive catalyst, simple work-up procedure, high yield of desired product and reusability of catalyst. Copyright © 2018 BCREC Group. All rights reservedReceived: 5th January 2018; Revised: 25th May 2018; Accepted: 27th May 2018How to Cite: Magar, R.R., Pawar, G.T., Gadekar, S.P., Lande, M.K. (2018). An Efficient Synthesis of  1,8-Dioxo-Octahydroxanthenes Derivatives Using Heterogeneous Ce-ZSM-11 Zeolite Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3): 436-446 (doi:10.9767/bcrec.13.3.2062.436-446)Permalink/DOI: https://doi.org/10.9767/bcrec.13.3.2062.436-446 

scholarly journals Hydrogenation of Anthracene in Supercritical Carbon Dioxide Solvent Using Ni Supported on Hβ-Zeolite Catalyst

Catalysts ◽  
2012 ◽  
Vol 2 (1) ◽  
pp. 85-100 ◽  
Author(s):  
Endalkachew Sahle-Demessie ◽  
Venu Gopal Devulapelli ◽  
Ashraf Aly Hassan
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Zeolite Catalyst ◽  
Hβ Zeolite ◽  
Supercritical Carbon

Direct conversion of biomass derived l-rhamnose to 5-methylfurfural in water in high yield

2020 ◽  
Vol 22 (18) ◽  
pp. 5984-5988 ◽  
Author(s):  
Yunchao Feng ◽  
Zheng Li ◽  
Sishi Long ◽  
Yong Sun ◽  
Xing Tang ◽  
...  
Keyword(s):  
Direct Conversion ◽  
Raw Material ◽  
High Yield

We report here that l-rhamnose, a less popular renewable and commercially available carbohydrate, can be used as a potential raw material to generate 5-methylfurfural (MF).

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