Wyniki wyszukiwania - BazTech

1

Application of Ti/PbO2 anodes for electrochemical regeneration of chromium

Nazarov A., Prezhdo O., Tulskii G., Zubkowa W., Prezhdo V.

Polish Journal of Applied Chemistry

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2008

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nr 3-4/07,1-2/08

71-76

EN

Application of a novel anodic material with an active layer of lead dioxide to electrochemical regeneration of recycled industrial chromiumbearing solutions is investigated. The regeneration is understood as oxidation of Cr3+ ions retained in the recycled industrial waste to the Cr(VI) state. The developed material is inexpensive, resists corrosion and exhibits excellent operational characteristics.

2

Application of industrial monitoring to investigation of technological processes

Gryn G., Prezhdo O., Trusov N., Prezhdo V.

Polish Journal of Applied Chemistry

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2002

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Vol. 46, nr 2

95-109

EN

A new technique for processing of industrial monitoring data is developed and used to study the production of hydrogen cyanide via oxidative ammonolysis of methane by the Andrussov method. A mathematical model of the ammonolysis process is developed, based on the Brandon method. Analysis of the industrial monitoring data by means of the developed technique leads to conclusions not available from laboratory experiments. Based on the obtained results a new technological regime for hydrogen cyanide production by the Andrussov method is proposed and tested under industrial conditions.

3

Polarity, Polarizability and Molecular Structure of Autocomplexes on the Basic of 1,4-Naphthoquinone

Prezhdo V.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 10

1521-1531

EN

Experimental and theoretical investigation of molecular dipole moments and molar Kerr constants of 1,4-naphthoquinone based autocomplexes has been carried out. The results indicate the presence of intramolecular charge transfer of the n-_* type. A correlation of the experimental values of molar Kerr constants with the _0-constants of substituents to the arylamine fragment of the autocomplexes has been established. Substituents to the electron donor fragment of the autocomplexes systematically affect the angle between the donor and acceptor fragments. Ab initio quantum-chemical calculations support the n-_*-charge transfer structure and show notable changes in the charge on the nitrogen atom of the donor fragment due to complex formation.

4

Dipole Moment, Molar Kerr Constant, Crystal and Molecular Structure of 3-Chloro-N-methyl-N-nitroaniline

Prezhdo V., Bykova A. S., Głowiak T., Prezhdo O. V., Daszkiewicz Z., Kyzioł J. B.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 5

707-718

EN

Dipole moment, molar Kerr constant, crystal and molecular structure of m- ClC6H4N(CH3)NO2 (or C7H7ClN2O2) are studied. Comparison the data obtained by dipole moment and molar Kerr constant measurement, X-ray crystallographic investigation and quantum-chemical calculation show that the molecule contains a planar NNO2 nitroamino group which is twisted around the N-Cphenyl bond by ca 61.4_ from the plane of the aromatic ring. The structural data are compared with the data for p- ClC6H4N(CH3)NO2 and the influence of the substituent on the structural parameters of the molecule is established.