124-22-1Relevant academic research and scientific papers
Surface properties of Ni/MgO catalysts for the hydrogenation of lauronitrile
Chen, Hui,Xue, Mingwei,Shen, Jianyi
, p. 246 - 255 (2010)
60%Ni/MgO (wt%) catalysts were prepared by the co-precipitation method and the influence of n-butanol treatment was investigated. The results showed that the treatment with n-butanol improved the dispersion and reducibility of supported nickel, resulted in an increase of H2 uptake from 410 to 582 μmol/g, corresponding to an increase of active Ni surface area from 32 to 46 m2/g (increased by 42%). Accordingly, the catalytic activity for the hydrogenation of toluene to methyl cyclohexane was significantly increased. Microcalorimetric adsorption of H2 and CO indicated that the treatment with n-butanol increased the amount of active metal sites on the surface, without the change of electron densities of supported nickel surface. Microcalorimetric adsorption of CO2 and NH3 revealed the strong surface basicity and weak surface acidity for the Ni/MgO catalysts, especially for the reduced ones. The initial heat for the adsorption of acetonitrile was measured to be about 130 kJ/mol on the Ni/MgO catalysts, indicating the strong interaction between acetonitrile and the supported nickel, which might be an important factor determining the activity of nickel for the hydrogenation of aliphatic nitriles. The surface basicity of the Ni/MgO catalysts might play a role in inhibiting the formation of secondary and tertiary amines and therefore improved the selectivity to primary amine during the hydrogenation of lauronitrile to laurylamine. In addition, the Ni/MgO-B catalyst prepared with n-butanol treatment seemed more active for the hydrogenation of lauronitrile.
Physical and chemical properties of N-(2-hydroxyethyl)alkylamines
Radushev,Koltashev,Nasrtdinova,Shcherban,Chekanova,Plotnikova
, p. 1475 - 1479 (2010)
Physical and chemical properties of N-(2-hydroxyethyl)alkylamines were studied, isotherms of a surface tension of homologous series of these compounds on a liquid-gas interface in water and hydrochloric acid were obtained. Pleiades Publishing, Ltd., 2010.
MATERIALS COMPRISING CARBON-EMBEDDED COBALT NANOPARTICLES, PROCESSES FOR THEIR MANUFACTURE, AND USE AS HETEROGENEOUS CATALYSTS
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Page/Page column 17; 19, (2021/03/13)
The present invention relates to catalytically active material, comprising grains of non-graphitizing carbon with cobalt nanoparticles dispersed therein, wherein dP, the average diameter of cobalt nanoparticles in the non-graphitizing carbon grains, is in the range of 1 nm to 20 nm, D, the average distance between cobalt nanoparticles in the non-graphitizing carbon grains, is in the range of 2 nm to 150 nm, and ω, the combined total mass fraction of metal in the non-graphitizing carbon grains, is in the range of 30 wt% to 70 wt% of the total mass of the non-graphitizing carbon grains, and wherein dP, D and ω conform to the following relation: 4.5 dP / ω > D ≥ 0.25 dP / ω. The present invention, further, relates to a process for the manufacture of material according to the invention, as well as its use as a catalyst.
MATERIALS COMPRISING CARBON-EMBEDDED IRON NANOPARTICLES, PROCESSES FOR THEIR MANUFACTURE, AND USE AS HETEROGENEOUS CATALYSTS
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Page/Page column 14, (2021/03/13)
201900257 Ausland 18 Abstract The present invention relates to catalytically active material, comprising grains of non-graphitizing carbon with iron nanoparticles dispersed therein, wherein dp, the average diameter of iron nanoparticles in the non-graphitizing carbon grains, is in the range of 1 nm to 20 nm, D, the average distance between iron nanoparticles in the non-graphitizing carbon grains, is in the range 5 of 2 nm to 150 nm, and ω, the combined total mass fraction of metal in the non-graphitizing carbon grains, is in the range of 30 wt% to 70 wt% of the total mass of the non-graphitizing carbon grains, and wherein dp, D and ω conform to the following relation: 4.5 dp / ω > D ≥ 0.25 dp / ω. The present invention, further, relates to a process for the manufacture of material according to the invention, as well as its use as a catalyst. 10
Efficient hydrogenation of aliphatic amides to amines over vanadium-modified rhodium supported catalyst
Hernandez, Willinton Y.,Kusema, Bright T.,Pennetier, Alex,Streiff, Stéphane
, (2021/08/19)
This work presents a highly efficient catalytic hydrogenation system developed for the selective transformation of tertiary N,N-dimethyldodecanamide and secondary azepan-2-one amides to the corresponding amines. Industrial hydrogenation catalysts Pd/Al2O3, Pt/Al2O3 and Rh/Al2O3 were modified with vanadium (V) or molybdenum (Mo) species as oxophilic centres. The modified catalysts were prepared by deposition of V or Mo precursor on supported catalysts via impregnation method. The catalysts were characterized by ICP-OES, XRD, XPS, H2-TPR, FTIR, CO-chemisorption, TEM, SEM-EDX and TGA. Modified Rh-V/Al2O3 catalyst displayed the best performance affording high yield and selectivity >95 % to the desired tertiary and secondary amines at moderate reaction conditions of T H2 0 sites and oxophilic Vδ+ sites in the bimetallic Rh-V/Al2O3 catalyst were determined to be beneficial for the selective dissociation of C[dbnd]O bond of the carboxamides into the desired amines.
Direct Enzymatic Synthesis of Fatty Amines from Renewable Triglycerides and Oils
Bevinakatti, Han,Citoler, Joan,Finnigan, William,Turner, Nicholas J.
, (2021/11/30)
Fatty amines represent an important class of commodity chemicals which have broad applicability in different industries. The synthesis of fatty amines starts from renewable sources such as vegetable oils or animal fats, but the process has multiple drawbacks that compromise the overall effectiveness and efficiency of the synthesis. Herein, we report a proof-of-concept biocatalytic alternative towards the synthesis of primary fatty amines from renewable triglycerides and oils. By coupling a lipase with a carboxylic acid reductase (CAR) and a transaminase (TA), we have accomplished the direct synthesis of multiple medium and long chain primary fatty amines in one pot with analytical yields as high as 97 %. We have also performed a 75 mL preparative scale reaction for the synthesis of laurylamine from trilaurin, obtaining 73 % isolated yield.
SUPPORTED HETEROGENEOUS CATALYST, PREPARATION AND USE THEREOF
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Page/Page column 21, (2021/06/11)
A supported heterogeneous catalyst comprises rhodium and vanadium on a support, wherein the supported heterogeneous catalyst is preparable by depositing vanadium on a supported rhodium catalyst by impregnation. A process for preparing the aforementioned catalyst and a process for converting an amide into an amine in the presence of the aforementioned catalyst are provided.
PROCESS FOR CONVERTING AMIDE TO AMINE
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Page/Page column 22, (2021/06/11)
Provided is a process for converting an amide into an amine comprising hydrogenation of the amide at a temperature not higher than 130°C and a hydrogen pressure not higher than 50 bar in the presence of a supported heterogeneous catalyst preparable by a method comprising depositing vanadium on a supported noble metal catalyst by impregnation.
One-pot reductive amination of carboxylic acids: a sustainable method for primary amine synthesis
Coeck, Robin,De Vos, Dirk E.
supporting information, p. 5105 - 5114 (2020/08/25)
The reductive amination of carboxylic acids is a very green, efficient and sustainable method for the production of (bio-based) amines. However, with current technology, this reaction requires two to three reaction steps. Here, we report the first (heterogeneous) catalytic system for the one-pot reductive amination of carboxylic acids to amines, with solely H2 and NH3 as the reactants. This reaction can be performed with relatively cheap ruthenium-tungsten bimetallic catalysts in the green and benign solvent cyclopentyl methyl ether (CPME). Selectivities of up to 99% for the primary amine could be achieved at high conversions. Additionally, the catalyst is recyclable and tolerant for common impurities such as water and cations (e.g. sodium carboxylate).
ENVIRONMENTALLY-FRIENDLY HYDROAZIDATION OF OLEFINS
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Page/Page column 95-96, (2020/01/24)
The present invention provides processes for the synthesis of organic azides, intermediates for the production thereof, and compositions related thereto.
