Chemistry

2005, No. 3

A.V. Bulanova, I.V. Gretskova, O.V. Muratova

SORPTION PROPERTIES OF SORBENTS USED FOR CLEANING UP SOILS FROM OIL POLLUTION

In the paper the basic stages of cleaning up soil from oil and mineral oil are considered. Sorption properties of the sorbents (grail, moss, expanded clay, sawdust) used for cleaning up soil from oil and mineral oil are studied. The results show that sawdust have the best sorption properties.

A.G. Golikov, A.P. Krivenko, A.A. Morozova

SYNTHESIS AND STRUCTURE OF POLYREPLACED DEKALONES-2

In the present study is found that the reaction between benzylidenfurfurylidencyclohexanone with ethyl acetoacetate proceeds regioselectivity like Michael’s condensation with formation 8а-hydroxy-4-phenyl-8-furfuryliden-3etoxycarbonildekalone-2. The formed compound has trans-coupling, axial orientation hydroxyl group and equatorial arrangement of other substitutes. The results are obtained by 13С–NMR spectrum.

Y.A. Lyabina, P.P. Purygin

RADIALLY OPENLOOP VORTEX STREAM IN AERODYNAMICS OF ROOMS

In the present study a technique for refinement of aerial environment characteristics based on the usage of stable vortex structures is proposed. These structures afford preset air velocities, separation of contaminating impurities near the center of the vortex stream and their transportation to neutralizing systems.

L.A.Onuchak, G.M. Sizonenko, S.Yu.Kudryashov, Yu.I. Arutyunov, O.V. Deynego

SODIUM FLUORESCEINE OBSERVATION IN MODELLING-SALT WATERS BY FLUORIMETER "FLUORAT 02-3M"

Mineralization, solution рН and inflorescent tracers (KCNS, KNO₃, carbamide) effect on fluorescence of sodium fluoresceine are studied. It is found that quantum yield of fluorescence is increasing with рН of solution and increasing of mineralization. Over tracers (KCNS in concentrations 4–20 mg/l, KNO₃ in concentrations 0.2–2 mg/l and carbamide in concentrations 20–100 mg/l) is practically no influences on line graphic I=f(C) obtained for sodium fluoresceine solution in water. Application of indicator methods to oil production allows to check installations for allocation of filtration streams, to reveal highly porous and fissured sections of a layer, to realize the check of water-supply development of oil wells, etc. In the capacity of indicators (tracers) ecologically safe inorganic and organic water-soluble compounds which are practically not sorbed and missing in edge waters are used. The special value has application of fluorescent indicators, in particular sodium fluoresceine which quantitative discovery in edge waters of mining holes can be carried out at low detection limits and rather selectively. The purpose of the work is to study the effect of mineralization and рН an aqueous medium on intensity of sodium fluoresceine fluorescence.

A.P. Shevchenko

STEREOCHEMISTRY FEATURES OF sp²-HYBRID CARBON ATOMS IN UNSATURATED HYDROCARBON CRYSTALS

The stereoatomic model is used to perform a crystal chemical analysis of 242 hydrocarbons containing only sp² hybrid carbon atoms. The characteristics of the Voronoi—Dirichlet polyhedra of 5831 kinds of carbon atoms and 3840 kinds of hydrogen or deuterium atoms are determined. The mean the Voronoi—Dirichlet polyhedron volumes for C and H are used to calculate the densities of the crystals studied. It is proposed that the intra- and intermolecular nonvalent contacts that formed faces of the Voronoi—Dirichlet polyhedra could be classified according to their rank, which is equal to the minimum number of valence bonds between the atoms that formed a contact. It is shown that the mean length of contacts with rank zero is close to the equilibrium distance of the corresponding atom–atom potential.