The liquid-phase hydrogenation of methyl acetoacetate using nickel-exchanged Y zeolite catalysts: Part III. The role of surface acidity

Liquid phase hydrogenation of chloronitrobenzenes to corresponding chloroanilines over Pd on carbon (Pd/C) under mild reaction conditions was studied. On the basis of 1H, 13C NMR, GC-MS and HPLC analyses of reaction mixtures, the reaction pathways were evaluated. The reduction of substrates proceeds via the formation of chloronitrosobenzenes and N-(chlorophenyl)hydroxylamines and mainly results in the formation of the chloroanilines and aniline. Aniline is formed by hydrogenolysis of chlorine (dechlorination) in benzene ring. Other compounds (mono- and disubstituted azobenzenes and azoxybenzenes) were also detected by GS-MS and HPLC (<3 mole %). The used solvent influences the reaction mixture composition and catalyst activity.

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Liquid-phase hydrogenation of N-nitrosodimethylamine over Pd-Ni supported on CeO2-TiO2: The role of oxygen vacancies

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2018.08.066 ◽

2018 ◽

Vol 558 ◽

pp. 211-218 ◽

Cited By ~ 3

Author(s):

Ling Tan ◽

Ting Li ◽

Juan Zhou ◽

Huan Chen ◽

Fang Jiang

Keyword(s):

Liquid Phase ◽

Oxygen Vacancies ◽

Liquid Phase Hydrogenation

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Effect and role of alkali metals added to cobalt ion-exchanged X and Y zeolite catalysts in the gas-phase catalytic oxidation of benzyl alcohol

Physical Chemistry Chemical Physics ◽

10.1039/b305936g ◽

2003 ◽

Vol 5 (17) ◽

pp. 3818 ◽

Cited By ~ 10

Author(s):

Takayuki Seiki ◽

Asako Nakato ◽

Satoru Nishiyama ◽

Shigeru Tsuruya

Keyword(s):

Benzyl Alcohol ◽

Catalytic Oxidation ◽

Gas Phase ◽

Alkali Metals ◽

Zeolite Catalysts ◽

Y Zeolite ◽

Cobalt Ion ◽

Oxidation Of Benzyl Alcohol

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Elucidation of block boundaries as the dissolution channels in hydrated cement

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100109562 ◽

1978 ◽

Vol 36 (1) ◽

pp. 484-485

Author(s):

N.V. Belov ◽

U.I. Papiashwili ◽

B.E. Yudovich

Keyword(s):

Liquid Phase ◽

Grain Boundaries ◽

Benzoyl Peroxide ◽

Phase Contrast ◽

Active Role ◽

Point Of View ◽

Hardened Cement ◽

Hydrated Cement ◽

Hardened Cement Paste

It has been almost universally adopted that dissolution of solids proceeds with development of uniform, continuous frontiers of reaction.However this point of view is doubtful / 1 /. E.g. we have proved the active role of the block (grain) boundaries in the main phases of cement, these boundaries being the areas of hydrate phases' nucleation / 2 /. It has brought to the supposition that the dissolution frontier of cement particles in water is discrete. It seems also probable that the dissolution proceeds through the channels, which serve both for the liquid phase movement and for the drainage of the incongruant solution products. These channels can be appeared along the block boundaries.In order to demonsrate it, we have offered the method of phase-contrast impregnation of the hardened cement paste with the solution of methyl metacrylahe and benzoyl peroxide. The viscosity of this solution is equal to that of water.

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