Catalytic hydrogenation : V. An example of trans hydrogenation of an ethylenic double bond ☆Liquid phase hydrogenations of (i) 2,3-dimethylbicyclo[ 2,2,2]oct- 2-ene, (ii) 3-methyl- 2-methylenebicyclo[ 2,2,2] octane, and several of their mixtures have been studied over Raney nickel,...
Under the catalytic environment of ZnCl2 and MoS2, closed system gold tube thermal simulation experiments were conducted to quantitatively verify the contribution of catalytic hydrogenation to "HC promotion" by adding H2. The catalytic hydrogenation increased the kerogen HC generation capacity by 1.4–...
Hydrogenation reactions to 7 and 9 were performed on 1.0 mmol scale. Reactions to the cannabinoids were performed using an excess of isopiperitenol (1.1–1.5 equiv.). Isolated yields after chromatographic purification. d.r. and e.r. were determined by high-performance liquid chromatography or...
For example, at 423 K and 70 bar H2, a Ru pincer complex can catalyze hydrogenation of PA that leads to selective C–N bonds cleavage to form short-chain amines and alcohols (Equation 6).32 Similarly, PU can be depolymerized into diols, diamines, and methanol. Apart from high pressure...
Thus, from a synthetic point of view, it is important to note that this iron-based catalyst system is highly selective for the hydrogenation of the nitrile group in functionalized and multisubstituted substrates. As an example, amino-substituted and halogenated benzylic amines were prepared, which ...
example, its viscosity, density, coefficient of mass and heat transfer, dielectric constant can be adjusted by altering pressure or temperature slightly near the supercritical point.An advantage or merit of CO2 solvent presenting in the catalytic hydrogenation is that H2 and organic substrates could ...
givenindetail,leadingtoconsideration ofthecatalyticsites. Theengineeringliteratureofthenewprocessesis sparse;consequently,thereviewisqualitativeandspecu- lative.Theuniqueproblemsarerelatedtopluggingof catalystporesbyinorganicreactionproductsandtothe possibilityofunstableoperationwithexothermicreactions ofexplosivemixtures. ...
You et al. found the addition of Co to Ni/Al2O3 decreased metal particle size, and improved metal dispersion and metal-support interaction, which effectively enhanced the stability of catalyst by suppressing carbon deposition, being beneficial to CO hydrogenation, methane partial oxidation, and ...
Hydrotalcite and its derivatives are widely used in catalytic hydrogenation, organic conversion, water splitting, and other fields. Supported catalysts are very important for modern industry. A large number of experimental and theoretical studies have shown that the carrier in the supported catalysts not...
A method developed by former Mitsubishi Chemical Ind. (presently Mitsubishi Chemical Corp.) is an example of efficient hydrogenation of carboxylic acids using molecular hydrogen. This process provides aldehydes selectively in high yield by hydrogenation in vapor phase at high temperature (330˜400° C...