Hydrogenation of α,β-Unsaturated Carbonyl Compounds over Covalently Heterogenized Ru(II) Diphosphine Complexes on AlPO4-Sepiolite Supports

In this work, the covalent immobilization of two ruthenium(II) complexes, i.e., [RuIICl (bpea){(S)(-)(BINAP)}](BF4), 1, and [RuIICl(bpea)(DPPE)](BF4), 2, where BINAP = 2,2’-bis(diphenylphosphino)-1,1’-binaphthyl and DPPE = 1,2-bis(diphenylphosphino)ethane, have been obtained (AlPO4-Sepiolite@1 and AlPO4-Sepiolite@2) by using a N-tridentate ligand N,N-bis-(2-pyridylmethyl)ethylamine (bpea), linked to an amorphous AlPO4-Sepiolite (20/80) inorganic support. This AlPO4-sepiolite support is able to immobilize the double amount of ruthenium complex (1.65%) than the amorphous AlPO4 (0.89%). Both heterogenized complexes have been assessed as catalysts in the liquid phase hydrogenation of several substrates with carbonyl and/or olefinic double bonds using methanol as solvent, attaining good catalytic activity and high enantioselectivity (99%). The highest Turn Over Number (TON) value (748.6) was obtained over the [RuII Cl (bpea)(DPPE)](BF4) 2 catalyst, although the [RuIICl(bpea){(S)(-)(BINAP)}](BF4) 1 exhibits better reusability. In fact, the [RuIICl(bpea){(S)(-)(BINAP)}](BF4) immobilized on AlPO4-Sepiolite maintained the activity throughout 14 successive runs. Furthermore, some findings on hydrogenation mechanisms of the α,β-unsaturated carbonyl compounds over Ru catalysts have been also obtained.

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Liquid-Phase Hydrogenation to 2, 4-Tolylenediamine over Supported HY Catalysts

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.2381 ◽

2012 ◽

Vol 512-515 ◽

pp. 2381-2385

Author(s):

Xue Mei Zhang ◽

Feng Xing Niu

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Catalytic Hydrogenation ◽

Active Component ◽

Experimental Results ◽

Mass Ratio ◽

Liquid Phase Hydrogenation ◽

Catalytic Test

We have successfully prepared a novel passivation Ni/HY catalyst by the technologies of macerate-precipitatio.The catalysts are comprised of two contents: HY as carrier, Ni as active component，and we put it into the process of preparating aromatic amines.The nature of the catalysts was discussed based on the characterization results of BET , IR , SEM , XRD , TEM ,TPD , XPS and TPR . The catalytic hydrogenation technology for 2,4-dinitrobenzene in liquid phase can be an attractive and elegant routine for production of 2,4-tolylenediamine. The catalytic activity is evaluated at 2.2 MPa, 90 °C, 750r/min, solvent with reaction materials mass ratio of 60, catalyst with reaction materials mass ratio of 0.1. In the catalytic test, The experimental results over the catalyst showed that 2,4-dinitrobenzene and 2,4-tolylenediamine conversion and selective of 99.88% and 99.16% were obtained respectively.It is found that the catalyst is highly dispersion, stable, and reusable. No obvious deactivation of the catalyst was observed after repeated using twelve times.

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The concentration effect of adsorption nanocomplexes on the catalytic activity of skeletal nickel in liquid-phase hydrogenation of sodium maleate in aqueous organic environments

Protection of Metals and Physical Chemistry of Surfaces ◽

10.1134/s2070205113040102 ◽

2013 ◽

Vol 49 (4) ◽

pp. 451-454 ◽

Cited By ~ 4

Author(s):

M. V. Lukin ◽

A. V. Afineevskii

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Concentration Effect ◽

Skeletal Nickel ◽

Liquid Phase Hydrogenation ◽

Sodium Maleate

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Pd/SiO2–AlPO4 systems. Influence of the preparation variables on their catalytic activity

Canadian Journal of Chemistry ◽

10.1139/v85-569 ◽

1985 ◽

Vol 63 (12) ◽

pp. 3471-3477 ◽

Cited By ~ 7

Author(s):

A. Alba ◽

M. A. Aramendia ◽

V. Borau ◽

C. Jimenez ◽

J. M. Marinas

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Reaction Temperature ◽

Hydrogen Pressure ◽

Pd Catalysts ◽

Metal Precursor ◽

Preparation Conditions ◽

Liquid Phase Hydrogenation ◽

Initial Hydrogen Pressure ◽

Catalyst Reduction

A study on the liquid phase hydrogenation of cyclohexene over a series of Pd catalysts supported on various SiO2–AlPO4 systems (using a concentration of 2.47 M, with methanol as solvent, the initial hydrogen pressure is 5 bar and reaction temperature 300 K) is reported in this paper. The reaction has been studied as a standard in order to determine the most suitable preparation conditions for these catalystsWe have also studied the influence of other factors such as the kind of support, the nature of the metal precursor, the previous calcination of the precursor, the addition of alkaline hydroxides, and the catalyst reduction with various agents, on the catalytic activity of different Pd-supported systems

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Granulated Carbon Nanotubes as the Catalyst Support for Pt for the Hydrogenation of Nitrobenzene

Australian Journal of Chemistry ◽

10.1071/ch09162 ◽

2010 ◽

Vol 63 (1) ◽

pp. 131 ◽

Cited By ~ 10

Author(s):

Shao Jin ◽

Weizhong Qian ◽

Yi Liu ◽

Fei Wei ◽

Dezeng Wang ◽

...

Keyword(s):

Carbon Nanotubes ◽

Mass Transfer ◽

Catalytic Activity ◽

Activated Carbon ◽

Liquid Phase ◽

Transfer Rate ◽

High Selectivity ◽

Mass Transfer Rate ◽

Catalyst Support ◽

Liquid Phase Hydrogenation

Granulated Pt/carbon nanotubes (CNTs) were found to have a much better catalytic activity in the liquid phase hydrogenation of nitrobenzene than Pt/activated carbon (AC). The granulated CNTs had much larger pores than the AC particles, which gave a faster mass transfer rate of H2 that helped produce aniline with high selectivity.

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Liquid-phase hydrogenation of maleic anhydride over Pd/SiO2: effect of tin on catalytic activity and deactivation

Journal of Molecular Catalysis A Chemical ◽

10.1016/s1381-1169(02)00686-6 ◽

2003 ◽

Vol 198 (1-2) ◽

pp. 297-302 ◽

Cited By ~ 42

Author(s):

Seong Moon Jung ◽

Eric Godard ◽

Sang Yun Jung ◽

Kwang-Cheon Park ◽

Jung Uk Choi

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Maleic Anhydride ◽

Liquid Phase Hydrogenation

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Low temperature catalytic hydrolysis of carbon disulfide over nano-active carbon based catalysts prepared by liquid phase deposition

RSC Advances ◽

10.1039/c7ra06841g ◽

2017 ◽

Vol 7 (64) ◽

pp. 40354-40361 ◽

Cited By ~ 7

Author(s):

Kai Li ◽

Xin Song ◽

Guijian Zhang ◽

Chi Wang ◽

Ping Ning ◽

...

Keyword(s):

Catalytic Activity ◽

Liquid Phase ◽

Low Temperature ◽

Carbon Disulfide ◽

Metal Species ◽

Catalytic Hydrolysis ◽

Liquid Phase Deposition ◽

Solution Ph ◽

Good Catalytic Activity ◽

Hydrolysis Of

Fe/nano-AC has good catalytic activity for CS2 hydrolysis. The activity of the catalyst was affected by the amount of pores (5–10 nm). Metal species affected the oxidation of H2S. The solution pH and fluoride affected the generation of Fe3+.

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