Acquiring Clean and Highly Dispersed Nickel Particles (ca. 2.8 nm) by Growing Nickel-Based Nanosheets on Al2O3 as Efficient and Stable Catalysts for Harvesting Cyclohexane Carboxylic Acid from the Hydrogenation of Benzoic Acid

2019 ◽  
Vol 58 (8) ◽  
pp. 2846-2856 ◽  
Author(s):  
Weijie Lian ◽  
Bo Chen ◽  
Bingyu Xu ◽  
Song Zhang ◽  
Zhe Wan ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Nickel Particles ◽  
Highly Dispersed ◽  
Cyclohexane Carboxylic Acid

Solid state synthesis of Ru–MC with highly dispersed semi-embedded ruthenium nanoparticles in a porous carbon framework for benzoic acid hydrogenation

2016 ◽  
Vol 6 (19) ◽  
pp. 7259-7266 ◽  
Author(s):  
Zhengliang Jiang ◽  
Guojun Lan ◽  
Xiaoyan Liu ◽  
Haodong Tang ◽  
Ying Li
Keyword(s):  
Benzoic Acid ◽  
Ruthenium Nanoparticles ◽  
Excellent Performance ◽  
Ru Nanoparticles ◽  
Carbon Framework ◽  
Dry Grinding ◽  
Highly Dispersed ◽  
Aromatic Hydrogenation ◽  
Carbon Catalysts ◽  
Cyclohexane Carboxylic Acid

A dry grinding approach was reported for mesoporous Ru–carbon catalysts with semi-embedded Ru nanoparticles, which shows excellent performance in aromatic hydrogenation of benzoic acid to cyclohexane carboxylic acid.

Carbon Nanotubes-Supported Well-Dispersed Pd Nanoparticles for the Efficiently Selective Hydrogenation of Benzoic Acid to Synthesize Cyclohexane Carboxylic Acid

NANO ◽  
2019 ◽  
Vol 14 (01) ◽  
pp. 1950008 ◽  
Author(s):  
Yin Hu ◽  
Wei Chen ◽  
Qi Wu ◽  
Xin Xie ◽  
Weiguo Song
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Selective Hydrogenation ◽  
Pd Nanoparticles ◽  
High Dispersion ◽  
Activation Energy Barrier ◽  
Hydrogenation Rate ◽  
Hydrogenation Catalysts ◽  
Cyclohexane Carboxylic Acid ◽  
Full Conversion

Pd and carbon nanotube (CNT) composites were prepared by well-dispersed deposition of Pd nanoparticles on commercial CNT, and applied to the selective hydrogenation of benzoic acid (BA) to synthesize cyclohexane carboxylic acid (CCA). The catalysts and the hydrogenation products were analyzed by XRD, TEM, TG, FTIR, UV-Vis absorption, GC and GC-MS, respectively. Hydrogenation process was also optimized through varying the reaction parameters. The results demonstrate that Pd/CNT catalysts possess the highest hydrogenation efficiency, give the full conversion of BA and 100.0% selectivity towards CCA at the optimal hydrogenation conditions, by comparing with some commercial hydrogenation catalysts and Pd/C catalysts with commercial carbonaceous supports. The excellent hydrogenation performance of Pd/CNT is attributed to the stable crystalline CNT support and the high dispersion of Pd nanoparticles. In addition, the protic solvent is also beneficial to lower the activation energy barrier of BA hydrogenation, and further to improve the hydrogenation rate. This work implies that CNT can be potentially chosen as an effective carbonaceous support to prepare Pd/C catalyst with an outstanding performance of BA selective hydrogenation.

scholarly journals Some Decomposition Routes in the Mass Spectra of Aromatic Carboxylic Acids

1965 ◽  
Vol 20 (7) ◽  
pp. 883-887 ◽  
Author(s):  
J. H. Beynon ◽  
B. E. Job ◽  
A. E. Williams
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Mass Spectra ◽  
Deuterium Atom ◽  
Acid Group ◽  
Isophthalic Acid ◽  
Carboxylic Acid Group ◽  
Hydrogen Atoms

The mass spectra of benzoic acid, phthalic acid, isophthalic acid and terephthalic acid, together with the analogues deuterated on the carboxylic acid group have been studied. Exchange of the deuterium atom with hydrogen atoms on the positions ortho to a carboxylic acid group on the aromatic ring has been studied using meta-stable peaks.

A local proton source from carboxylic acid functionalized metal porphyrins for enhanced electrocatalytic CO2 reduction

2020 ◽  
Vol 44 (37) ◽  
pp. 16062-16068
Author(s):  
Yiwei Zhou ◽  
Yunheng Xiao ◽  
Jian Zhao
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Co2 Reduction ◽  
Proton Donor ◽  
Propanoic Acid ◽  
Metal Porphyrins ◽  
Proton Source

Metal tetraphenylporphyrin modified through the introduction of propanoic acid into the phenyl groups as a local proton donor exhibits higher CO2 electrocatalytic conversion to CO than benzoic acid.

scholarly journals Crystal structure of (E)-4-{2-[4-(allyloxy)phenyl]diazenyl}benzoic acid

2014 ◽  
Vol 70 (12) ◽  
pp. 499-502
Author(s):  
Md. Lutfor Rahman ◽  
Mashitah Mohd. Yusoff ◽  
Jamil Ismail ◽  
Huey Chong Kwong ◽  
Ching Kheng Quah
Keyword(s):  
Crystal Structure ◽  
Carboxylic Acid ◽  
Hydrogen Bonds ◽  
Benzoic Acid ◽  
Title Compound ◽  
Acid Group ◽  
Dihedral Angles ◽  
Carboxylic Acid Group ◽  
Compound C ◽  
Benzene Rings

The title compound, C16H14N2O3, has anEconformation about the azobenzene [—N=N– = 1.2481 (16) Å] linkage. The benzene rings are almost coplanar [dihedral angle = 1.36 (7)°]. The O atoms of the carboxylic acid group are disordered over two sets of sites and were refined with an occupancy ratio of 0.5:0.5. The two disordered components of the carboxylic acid group make dihedral angles of 1.5 (14) and 3.8 (12)° with the benzene ring to which they are attached. In the crystal, molecules are linkedviapairs of O—H...O hydrogen bonds, forming inversion dimers. The dimers are connectedviaC—H...O hydrogen bonds, forming ribbons lying parallel to [120]. These ribbons are linkedviaC—H...π interactions, forming slabs parallel to (001).

Derivate des Benzo[1.3]dioxols, 431 Über Benzo [1.3] dioxolcarbonsäuren / Derivatives of 1,3-Benzodioxoles, 43 1,3-Benzodioxolecarboxylic Acids

1978 ◽  
Vol 33 (7-8) ◽  
pp. 465-471
Author(s):  
Franz Daliacker ◽  
Volker Mues ◽  
In-O Kim
Keyword(s):  
Carboxylic Acid ◽  
Methyl Ester ◽  
Benzoic Acid ◽  
Myristic Acid ◽  
Good Yield ◽  
Acid Ester ◽  
Acid Methyl Ester ◽  
Acid Methyl ◽  
Derivatives Of

Abstract We describe the possibilities of formation and preparation of the “natural” 1,3-benzodioxolecarboxylic acids 1, 2, 4, 6 b, and 7, already mentioned in literature. Myristic acid (3e) was prepared in good yield from 3-methoxy-4,5-dihydroxy-benzoic acid ester (3c) , which could be easily made from 3-methoxy-2,3-carbonyldioxy-benzoic acid methylester (3b). Myristicic acid methylester (3d) could be subjected to methylation and hydrolysis leading to 3e without any difficulties. 4.6-dimethoxy-1,3-benzodioxole-5-carboxylic acid (5b) was prepared in good yields by oxidation of 4,6-dimethoxy-1,3-benzodioxole-5-aldehyde (5a). 5.7-dimethoxy-1,3-benzodioxole-carboxylic acid (13f), one of the “unnatural” 1,3-benzodioxolecarboxylic acids, derivatives of o-ipiperonylic acid (8), was prepared from 5-amino-7-methoxy-1,3- benzodioxole-4carboxylic acid methyl ester (13b) by diazotisation, elimination of nitrogen, methylation, and hydrolysis. A comparison of our measured pkA-values showed the strongest acidity belonging to 5,6-dimethoxy-1,3-benzodioxole-4-carbocylic acid (11).

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