Direct conversion of secondary propargyl alcohol into 1,3-di-arylpropanone via DBU promoted redox isomerization and palladium assisted chemoselective hydrogenation in a single pot operation

2021 ◽  
Author(s):  
Rimpa De ◽  
S. Antony Savarimuthu ◽  
Shubhadeep Chandra ◽  
Mrinal K Bera
Keyword(s):  
Direct Conversion ◽  
Single Step ◽  
Propargyl Alcohol ◽  
Efficient Catalyst ◽  
Chemoselective Hydrogenation ◽  
Redox Isomerization

Palladium(II)acetate is found to be an efficient catalyst for the single-step conversion of secondary propargyl alcohol to 1,3-diarylpropanone derivatives under mild basic conditions. The reaction is believed to proceed via...

Supported copper catalysts for highly efficient hydrogenation of biomass-derived levulinic acid and γ-valerolactone

2016 ◽  
Vol 18 (5) ◽  
pp. 1287-1294 ◽  
Author(s):  
Qing Xu ◽  
Xinglong Li ◽  
Tao Pan ◽  
Chuguo Yu ◽  
Jin Deng ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Copper Catalysts ◽  
Direct Conversion ◽  
Highly Efficient ◽  
Chemoselective Hydrogenation ◽  
Supported Copper Catalysts

Direct conversion of cellulose-derived levulinic acid into γ-valerolactone and γ-valerolactone into 1,4-pentanediol was carried out by chemoselective hydrogenation catalyzed through supported copper-catalysts.

The Use of Nafion-H® as an Efficient Catalyst for the Direct Conversion of Primary and Secondary Trimethylsilyl Ethers to Their Corresponding Ethers under Mild and Heterogeneous Conditions.

ChemInform ◽  
2004 ◽  
Vol 35 (5) ◽  
Author(s):  
Mohammad Ali Zolfigol ◽  
Iraj Mohammadpoor-Baltork ◽  
Davood Habibi ◽  
BiBi Fatemeh Mirjalili ◽  
Abdolhamid Bamoniri
Keyword(s):  
Direct Conversion ◽  
Efficient Catalyst ◽  
Trimethylsilyl Ethers

scholarly journals Direct Convertion Of Methane To Liquid Hydrocarbons Using HZSM-5 Zeolite Catalyst Loaded With Metal

REAKTOR ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 7
Author(s):  
D. D. Anggoro
Keyword(s):  
Natural Gas ◽  
Packed Bed ◽  
Direct Conversion ◽  
Single Step ◽  
Packed Bed Reactor ◽  
Impregnation Method ◽  
Liquid Hydrocarbons ◽  
Oxidation Of Methane ◽  
Conversion Of Methane ◽  
Main Component

Methane is the main component of natural gas and this research provides the platrorm on the potential of utilizing natural gas, found abundant in Indonesia, to form gasoline. The objectives of the research are to modify HZSM-5 zeolite with a series of transition metals (Cr, Mn, Co, Ni, Cu, and Pt) and Ga , and to evaluate the performances  of these catalyst  for the single step conversion of methane to gasoline. The oxidation of methane were carried out in a micro-packed bed reactor at atmoepheric pressure, temperature 800 0C, F/W = 10440 ml/g.hr and 9%vol O2. Metals were loaded into the HZSM-5 zeolite by the wetness incipient impregnation method. The characterization results indicated that the ionic metals (Mn+) occupy the H+ position of HZSM-5 and metal loaded HZSM-5. Ni- HZSM-5, Cu- HZSM-5 and Ga- HZSM-5 gave a high methane conversion and high gasoline selectivity. Among the catalyst samles tested, Cr- HZSM-5 showed the highest  Research Octane Number (RON=86). These  catalyst have the potential  to convert natural gas to C5+ liquid hydrocarbons provided the oxidation, dehydration and oligomerization function of the metals are in balance.Keywords : direct conversion, methane, liquid hydrocarbons, metal, HZSM-5

Facile single step synthesis of an acid functionalized nano porous carbon composite as an efficient catalyst for tertiary butylation of phenol

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 57223-57226 ◽  
Author(s):  
Devaki Nandan ◽  
Nagabhatla Viswanadham
Keyword(s):  
Porous Carbon ◽  
Coal Tar ◽  
Carbon Composite ◽  
Single Step ◽  
Efficient Catalyst ◽  
Petroleum Waste ◽  
One Step ◽  
Produce Acid ◽  
Waste Coal

A simple, one step, simultaneous carbonization and sulfonation of petroleum waste coal tar was conducted to produce acid functionalized nano porous carbon and applied for tertiary butylation of phenol.

ChemInform Abstract: Copper Triflate: An Efficient Catalyst for Direct Conversion of Secondary Alcohols into Azides.

ChemInform ◽  
2014 ◽  
Vol 45 (32) ◽  
pp. no-no ◽  
Author(s):  
Poonam Khedar ◽  
Kasiviswanadharaju Pericherla ◽  
Anil Kumar
Keyword(s):  
Direct Conversion ◽  
Secondary Alcohols ◽  
Efficient Catalyst

Ethylene formation by methane dehydrogenation and C–C coupling reaction on a stoichiometric IrO2 (110) surface – a density functional theory investigation

2015 ◽  
Vol 5 (8) ◽  
pp. 4064-4071 ◽  
Author(s):  
T. L. M. Pham ◽  
E. G. Leggesse ◽  
J. C. Jiang
Keyword(s):  
Density Functional ◽  
Catalyst Surface ◽  
Coupling Reaction ◽  
Direct Conversion ◽  
Efficient Catalyst ◽  
Functional Theory ◽  
Elementary Reactions ◽  
Ethylene Formation ◽  
Conversion Of Methane ◽  
Mild Temperature

The capability to activate methane at mild temperature and facilitate all elementary reactions on the catalyst surface is a defining characteristic of an efficient catalyst especially for the direct conversion of methane to ethylene.

scholarly journals Supported Bimetallic AuPd Nanoparticles as Catalyst for the Solvent-Free Selective Hydrogenation of Nitroarenes

2018 ◽  
Author(s):  
Ruiyang Qu ◽  
Margherita Macino ◽  
Sarwat Iqbal ◽  
Xiang Gao ◽  
Qian He ◽  
...  
Keyword(s):  
Activation Energy ◽  
Reaction Temperature ◽  
Selective Hydrogenation ◽  
Energy Input ◽  
Solvent Free ◽  
Impregnation Method ◽  
Efficient Catalyst ◽  
Effective Catalyst ◽  
Chemoselective Hydrogenation ◽  
Solvent Free Conditions

Selective hydrogenation of nitrobenzene was carried out under solvent-free conditions using supported AuPd nanoparticles catalyst, prepared by modified impregnation method (MIm), as efficient catalyst. >99% yield of aniline (AN) was obtained after 15 hours at 90 °C, 3 bar H2 that can be used without any further purification or separation, therefore reducing cost and energy input. Supported AuPd nanoparticles catalyst, prepared by MIm, was found to be active and stable even after 4 recycle experiments whereas the same catalyst prepared by SIm deactivated during the recycle experiments. The most effective catalyst was tested for the chemoselective hydrogenation of 4-chloronitrobenzene (CNB) to 4-chloroaniline (CAN). The activation energy of CNB to CAN was found to be 25 kJ mol-1, while that of CNB to AN was found to be 31 kJ mol-1. Based on this, the yield of CAN was maximized (92%) by lowering the reaction temperature to 25 °C.

Gold supported on mesostructured ceria as an efficient catalyst for the chemoselective hydrogenation of carbonyl compounds in neat water

2011 ◽  
Vol 13 (3) ◽  
pp. 602 ◽  
Author(s):  
Miao-Miao Wang ◽  
Lin He ◽  
Yong-Mei Liu ◽  
Yong Cao ◽  
He-Yong He ◽  
...  
Keyword(s):  
Carbonyl Compounds ◽  
Efficient Catalyst ◽  
Neat Water ◽  
Chemoselective Hydrogenation

scholarly journals Ruthenium Nanoparticles Intercalated in Montmorillonite (nano-Ru@MMT) Is Highly Efficient Catalyst for the Selective Hydrogenation of 2-Furaldehyde in Benign Aqueous Medium

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 66
Author(s):  
Farooq-Ahmad Khan ◽  
Sana Yaqoob ◽  
Nourina Nasim ◽  
Yan Wang ◽  
Muhammad Usman ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Furfuryl Alcohol ◽  
Research Area ◽  
Green Solvents ◽  
Important Research ◽  
Ruthenium Nanoparticles ◽  
Turnover Number ◽  
Efficient Catalyst ◽  
Chemoselective Hydrogenation ◽  
Important Research Area

Chemoselective hydrogenation of 2-furaldehyde to furfuryl alcohol using green solvents is an important research area to get eco-friendly fuels and fine chemicals. Herein, we report ruthenium nanoparticles (~1.8 nm) intercalated in montmorillonite as an efficient catalytic system, which can selectively hydrogenate 2-furaldehyde in a benign aqueous medium. The complete conversion was observed at 40 °C with 1 MPa H2, the selectivity of furfuryl alcohol being >99%, and turnover number 1165. After a catalytic run, the montmorillonite-supported ruthenium nanoparticles can be recycled and reused without losing their activity and selectivity.

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