16 Result(s)

Article

Homogeneous catalysts of redox reactions based on heteropoly acid solutions. II. Synthesis of catalyst for pilot industrial production of methylethylketone

The homogeneous catalyst used in the 2005–2006 scale-up of the oxidation of n-butylenes into methylethylketone to the industrial level is a chloride-free aqueous solution of palladium complexes in a modified 0.25...

V. F. Odyakov, E. G. Zhizhina, K. I. Matveev, V. N. Parmon in Catalysis in Industry (2015)

Article

Homogeneous redox catalysts based on heteropoly acid solutions: I. Pilot testing of a catalyst and methyl ethyl ketone synthesis

The pilot experiments on methyl ethyl ketone (MEK) synthesis in 2005–2006 were aimed at develo** a technology for highly selective n-butylene oxidation with oxygen into MEK in the presence of a new homogeneous ...

K. I. Matveev, E. G. Zhizhina, V. F. Odyakov, V. N. Parmon in Catalysis in Industry (2014)

Article

Kinetics and mechanism of the homogeneous oxidation of n-butenes to methyl ethyl ketone in a solution of Mo-V-phosphoric heteropoly acid in the presence of palladium pyridine-2,6-dicarboxylate

In catalytic two-step n-butene oxidation with dioxygen to methyl ethyl ketone, the first step is the oxidation of n-C₄H₈ with an aqueous solution of Mo-V-P heteropoly acid in the presence of Pd(II) complexes. The...

V. F. Odyakov, E. G. Zhizhina in Kinetics and Catalysis (2011)

Article

Physicochemical and corrosive properties of oxidation catalysts based on solutions of Mo-V-phosphoric heteropoly acids

Modified aqueous solutions of Mo-V-phosphoric heteropoly acids (HPAs) are used as high-performance catalysts for the oxidation of substrates from different classes with oxygen. The oxidation of n-butenes to methy...

E. G. Zhizhina, V. F. Odyakov in Catalysis in Industry (2010)

Article

Precipitation of phosphorus as NH₄[MgPO₄] · xH₂O in the presence of citrates, d,l-tartaric acid, and their complexes with vanadium and molybdenum

For determination of phosphorus in Mo-V-phosphoric heteropoly acid solutions, it must be separated from considerable amounts of vanadium and molybdenum by precipitation as NH₄[MgPO₄] · xH₂O. It is shown that the ...

V. F. Odyakov, E. G. Zhizhina in Russian Journal of Inorganic Chemistry (2010)

Article

New process for preparing aqueous solutions of Mo-V-phosphoric heteropoly acids

A new ecofriendly process is proposed for the synthesis of aqueous solutions of Mo-V-phosphoric Keggin heteropoly acids H_{3 + x} PV _x Mo_{12 − x ...}

V. F. Odyakov, E. G. Zhizhina in Russian Journal of Inorganic Chemistry (2009)

Article

Catalytic oxidation of organic compounds with oxygen in the presence of Mo-V-phosphoric heteropoly acid solutions

The studies carried out at the Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, on the selective catalytic oxidation of organic compounds with oxygen in the presence of aqueous solutions o...

E. G. Zhizhina, V. F. Odyakov, M. V. Simonova in Kinetics and Catalysis (2008)

Article

Kinetics of Oxidation of Reduced Phosphorus-Molybdenum-Vanadium Heteropoly Acid Species with Dioxygen in Aqueous Solutions

The kinetics of dioxygen oxidation of the reduced heteropoly acid H_{7 + m} PV _m ^IV V _{4 − m} ^V Mo₈O⁴⁰ (H_mHPA-4)...

E. G. Zhizhina, V. F. Odyakov, M. V. Simonova, K. I. Matveev in Kinetics and Catalysis (2005)

Article

Kinetics of oxidation of butene-1 to butanone in aqueous solution in the presence of ions Pd²⁺ and Mo-V-phosphoric heteropoly acid

Oxidation of butene-1 to butanone in the presence of homogeneous catalysts (PdSO₄ + HPA-x), where HPA-x = H_3+xPV_xMo_12-xO₄₀, 1 £ x £ 4, was investigated. This reaction is found to be of the 1st order with respect ...

E.G. Zhizhina, M.V. Simonova, V.F. Odyakov… in Reaction Kinetics and Catalysis Letters (2003)

Article

Kinetics of the oxidation of reduced mo-v-phosphoric heteropoly acid species with dioxygen in concentrated aqueous solutions

Concentrated (0.2 M) aqueous solutions of HP-acids, such as H_3+x+mPV^IV _mV^V _x-mMo_12-xO₄₀ and their analogues with an excess VO²⁺ cation, are oxidized by dioxygen at 343 K and atmosp...

E.G. Zhizhina, V.F. Odyakov, M.V. Simonova… in Reaction Kinetics and Catalysis Letters (2003)

Article

New Route to Vicasol, a Water-Soluble Form of Vitamin K3

A procedure was suggested for preparing vicasol in an approximately 85% yield in a two-phase system consisting of concentrated (∼5-6 M) aqueous solution of NaHSO₃ and a solution of 2-methyl-1,4-naphthoquinone in ...

K. I. Matveev, V. F. Odyakov, E. G. Zhizhina in Russian Journal of Applied Chemistry (2001)

Article

New catalytic methods for the synthesis of vitamins K: K₃, K₄ and Vikasol

A series of catalysts is developed for synthesis of vitamins K from easily available l-naphthol. The corresponding catalytic reactions compose the background of VIKASIB technology, which is friendly to the env...

K. I. Matveev, E. G. Zhizhina, V. F. Odyakov… in Reaction Kinetics and Catalysis Letters (1996)

Article

New potentiometric method for vikasol determination

V. F. Odyakov, E. G. Zhizhina, K. I. Matveev in Pharmaceutical Chemistry Journal (1996)

Article

New catalytic method for the synthesis of vitamins K

A new catalytic method for the synthesis of vitamins of the K family is suggested. In this method 2-methyl-1-naphthol is oxidized by dioxygen in the presence of Mo-V-P heteropoly acids or their salts in a two-...

K. I. Matveev, E. G. Zhizhina, V. F. Odyakov in Reaction Kinetics and Catalysis Letters (1995)

Article

Phase-transfer oxidation of 2-methyl-1-naphthol into 2-methyl-1,4-naphthoquinone in the presence of vanadomolybdophosphoric heteropolyacids

2-Methyl-1-naphthol is oxidized into 2-methyl-1,4-naphthoquinone (menadione) by air in the presence of vanadomolybdophosphoric heteropolyacids and their salts. The reaction proceeds in a biphasic system, and t...

K. I. Matveev, E. G. Zhizhina, V. F. Odyakov, V. N. Parmon in Russian Chemical Bulletin (1994)

Article

Vitamin k₃, synthesis, properties, and analysis (review)

V. F. Odyakov, T. F. Titova, K. I. Matveev… in Pharmaceutical Chemistry Journal (1992)