Benzoic Acid/TEMPO as a Highly Efficient Metal-Free Catalyst System for Selective Oxidation of 5-hydroxymethylfurfural into 2, 5-diformylfuran

2017 ◽  
Vol 5 (8) ◽  
pp. 1429-1434 ◽  
Author(s):  
Jinlong Li ◽  
Guangqiang Lv ◽  
Boqiong Lu ◽  
Yingxiong Wang ◽  
Tiansheng Deng ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Selective Oxidation ◽  
Catalyst System ◽  
Metal Free ◽  
Highly Efficient

Highly efficient and stable peracid for rapid and selective oxidation of aliphatic amines to oximes

2015 ◽  
Vol 39 (8) ◽  
pp. 6677-6682 ◽  
Author(s):  
Vilas V. Patil ◽  
Eknath M. Gayakwad ◽  
Ganapati S. Shankarling
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Aliphatic Amines ◽  
Metal Free ◽  
Highly Efficient ◽  
Benzylic Amines

A novel, transition-metal free, rapid approach for selective oxidation of aliphatic and benzylic amines to oximes is described.

A biomass-derived metal-free catalyst doped with phosphorus for highly efficient and selective oxidation of furfural into maleic acid

2021 ◽  
Vol 23 (3) ◽  
pp. 1370-1381
Author(s):  
Huifa Zhang ◽  
Shaolin Wang ◽  
Huixian Zhang ◽  
James H. Clark ◽  
Fahai Cao
Keyword(s):  
Catalytic Activity ◽  
Phytic Acid ◽  
Selective Oxidation ◽  
Maleic Acid ◽  
Carbon Catalyst ◽  
Metal Free ◽  
Highly Efficient

The P–C-T carbon catalyst derived from abundant biomass molecule phytic acid exhibited a remarkable catalytic activity for maleic acid (MA) synthesis from furfural.

Selective Oxidation of Alcohols Catalyzed by a Transition Metal-Free System of NHPI/DDQ/NaNO2

2011 ◽  
Vol 32 (1) ◽  
pp. 118-122 ◽  
Author(s):  
Lipeng ZHOU ◽  
Chaofeng ZHANG ◽  
Tao FANG ◽  
Bingbing ZHANG ◽  
Ying WANG ◽  
...  
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Free System ◽  
Metal Free ◽  
Oxidation Of Alcohols

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

Highly efficient metal-free electro-Fenton degradation of organic contaminants on a bifunctional catalyst

2021 ◽  
Vol 416 ◽  
pp. 125859
Author(s):  
Xin Qin ◽  
Kun Zhao ◽  
Xie Quan ◽  
Peike Cao ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Bifunctional Catalyst ◽  
Metal Free ◽  
Highly Efficient

scholarly journals Author Correction: A metal-free photocatalyst for highly efficient hydrogen peroxide photoproduction in real seawater

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qingyao Wu ◽  
Jingjing Cao ◽  
Xiao Wang ◽  
Yan Liu ◽  
Yajie Zhao ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Metal Free ◽  
Highly Efficient

A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-21490-z

Noble-metal-free dye-sensitized selective oxidation of methane to methanol with green light (550 nm)

Nano Research ◽  
2021 ◽  
Author(s):  
Xingyang Wu ◽  
Yi Zeng ◽  
Hangchen Liu ◽  
Jiaqing Zhao ◽  
Tierui Zhang ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Noble Metal ◽  
Green Light ◽  
Metal Free ◽  
Dye Sensitized ◽  
Oxidation Of Methane
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