Oxidative Conversion of Light Alkanes on Silver Catalysts

1992 ◽  
pp. 155-163 ◽  
Author(s):  
A.G. Anshits ◽  
S.N. Vereshchagin ◽  
A.N. Shigapov ◽  
H.D. Gesser
Keyword(s):  
Oxidative Conversion ◽  
Light Alkanes ◽  
Silver Catalysts

Preparation of the MoVTeNbBiO catalysts for selective oxidative conversion of light alkanes

2019 ◽  
Vol 19 (4) ◽  
pp. 299-306
Author(s):  
E. V. Lazareva ◽  
V. M. Bondareva ◽  
D. A. Svintsitskiy ◽  
T. Yu. Kardash
Keyword(s):  
Acrylic Acid ◽  
Physicochemical Properties ◽  
Oxide Catalyst ◽  
Lower Content ◽  
Oxidative Conversion ◽  
Light Alkanes ◽  
Bismuth Compound ◽  
Maximal Yield ◽  
Inactive Phase ◽  
Practicable Method

Physicochemical properties of modified MoVTeNbО catalysts are shown to depend strongly on the preparation procedure and the source of bismuth. Addition of a pH-neutral organic bismuth-containing compound at the stage of mixing initial component solutions is accompanied by precipitation and formation of inactive phase but not the necessary phase M1. Irrespectively of the nature of the initial bismuth compound, the introduction of it to the dry MoVTeNb precursor results in destruction of the latter and, as a consequence, in a lower content of phase M1 and the formation of binary V-Mo and Te-Mo oxides. In the reaction of oxidative dehydrogenation of ethane (ODE), the maximal yield of ethylene (76.5 %) is observed with the catalyst obtained by impregnation of calcined MoVTeNb oxide catalyst with a solution of an organobismuth compound. The same catalyst provides the yield of acrylic acid of ca. 48 %. Nevertheless, a more practicable method for preparation of bismuthcontaining catalysts is the addition of bismuth nitrate to the solution of the initial components; such an ODE catalyst provides the maximal yield of ethylene of ca. 76 %.

Oxidative conversion of light alkanes diluted by nitrogen, helium or methane

2014 ◽  
Vol 238 ◽  
pp. 9-16 ◽  
Author(s):  
V.S. Arutyunov ◽  
R.N. Magomedov ◽  
A.Yu. Proshina ◽  
L.N. Strekova
Keyword(s):  
Oxidative Conversion ◽  
Light Alkanes

Oxidative conversion of light alkanes to olefins over alkali promoted oxide catalysts

2002 ◽  
Vol 227 (1-2) ◽  
pp. 287-297 ◽  
Author(s):  
László Leveles ◽  
Stefan Fuchs ◽  
Kulathuiyer Seshan ◽  
Johannes A Lercher ◽  
Leon Lefferts
Keyword(s):  
Oxide Catalysts ◽  
Oxidative Conversion ◽  
Light Alkanes

Preparing MoVTeNbBiO Catalysts for the Selective Oxidative Conversion of Light Alkanes

2020 ◽  
Vol 12 (1) ◽  
pp. 39-46 ◽  
Author(s):  
E. V. Lazareva ◽  
V. M. Bondareva ◽  
D. A. Svintsitskii ◽  
T. Yu. Kardash
Keyword(s):  
Oxidative Conversion ◽  
Light Alkanes

Recent advances in the Silver catalysed synthesis of furan and its applications

2020 ◽  
Vol 09 ◽  
Author(s):  
C M A Afsina ◽  
Mohan Neetha ◽  
Thaipparambil Aneeja ◽  
Gopinathan Anilkumar
Keyword(s):  
Organic Synthesis ◽  
Oxidation Potential ◽  
Silver Complexes ◽  
Wide Spread ◽  
Silver Catalysts ◽  
Recent Advances ◽  
High Oxidation ◽  
Furan Moiety ◽  
Anti Fungal ◽  
Fragrance Compounds

: Furan and its derivatives find wide-spread application as pharmaceuticals, pigments, dyes, brighteners, flavour & fragrance compounds and insecticides. They also exhibit anti-hyperglycemic, analgesic, anti-inflammatory, antibacterial, anti-fungal and anti-tumour activities. Silver catalysts are nowadays commonly used in organic synthesis due to the high oxidation potential and versatile nature of silver complexes. In this review, we summarise the recent advances in the synthesis and applications of furan moiety using silver catalysis and covers literature from 2015-2020.

Decomposition of hydrogen peroxide on nickel-silver two-component catalyst

1984 ◽  
Vol 49 (10) ◽  
pp. 2222-2230 ◽  
Author(s):  
Viliam Múčka ◽  
Rostislav Silber
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Properties ◽  
Silver Ions ◽  
Surface Concentration ◽  
Chloride Ions ◽  
Nickel Silver ◽  
Silver Catalysts ◽  
Physico Chemical ◽  
Low Degree ◽  
Defective Crystal

The catalytic and physico-chemical properties of low-temperature nickel-silver catalysts with nickel oxide concentrations up to 43.8% (m/m) are examined via decomposition of hydrogen peroxide in aqueous solution. The mixed catalysts prepared at 250°C are composed of partly decomposed silver carbonate or oxide and nickel carbonate or hydroxide decomposed to a low degree only and exhibiting a very defective crystal structure. The activity of these catalysts is determined by the surface concentration of silver ions, which is affected by the nickel component present. The latter also contributes to the thermal stability of the catalytic centres of the silver component, viz. the Ag+ ions. The concentration of these ions varies with the temperature of the catalyst treatment, the activity varies qualitatively in the same manner, and the system approaches the Ag-NiO composition. The catalytic centres are very susceptible to poisoning by chloride ions. A previous exposition of the catalyst to a gamma dose of 10 kGy from a 60Co source has no measurable effect on the physico-chemical properties of the system.

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