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L. V. Sheheeva
L. V. Sheheeva

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Articles

Article
  • Date submitted
    1972-09-27
  • Date accepted
    1972-11-06

Distribution in the Te(IѴ) system--HCl—H20—TBF—hexane

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The distribution of the extracted substance between the aqueous and organic phases, among other factors, depends on the diluent chosen. It has already been noted in many works that dilution with alkanes usually increases the extraction capacity of TBP.

How to cite: Shikheeva L.V. Distribution in the Te(IѴ) system--HCl—H20—TBF—hexane // Journal of Mining Institute. 1973. Vol. 54. Iss. 3. p. 138-144.
Article
  • Date submitted
    1972-09-19
  • Date accepted
    1972-11-19

Spectrophotometric determination of small amounts of tellurium in hydrochloric acid solutions

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Tellurium in the tetravalent state in hydrochloric acid solutions forms moderately strong complexes that absorb in the ultraviolet region. The spectrum consists of a number of bands characterizing various tellurium-containing particles. Solutions with high HCl content (5-10 mol/l) and low tellurium content (10-6-10-3 mol/l) have buffering properties. The proportion of different forms of tellurium-containing particles depends little on the total concentration of tellurium and is determined by the concentration of hydrochloric acid.

How to cite: Shikheeva L.V. Spectrophotometric determination of small amounts of tellurium in hydrochloric acid solutions // Journal of Mining Institute. 1973. Vol. 54. Iss. 3. p. 148-153.
Article
  • Date submitted
    1969-12-26
  • Date accepted
    1970-02-25

Специфическая сольватация в процессах экстракции триалкилфосфатами

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Распределение экстрагируемого вещества между водной и органической фазами зависит от характера используемого раз­бавителя. Если в качестве разбавителя используются керосин или индивидуальные алканы, т. е. соединения, мало полярные и не обладающие способностью образовывать донорно-акцепторные связи, то их взаимодействие с трибутилфосфатом (ТБФ) и сольватом, по-видимому, ограничивается возникнове­нием дисперсионных сил без образования молекулярных соеди­нений с растворенными веществами. В таких системах очень часто наблюдается ограниченная растворимость сольватов экстрагируемых соединений ...

How to cite: Shikheeva L.V. // Journal of Mining Institute. 1970. Vol. 50. Iss. 3. p. 86.
Article
  • Date submitted
    1969-12-26
  • Date accepted
    1970-02-11

Влияние температуры на распределение соляной кислоты в системе НС1—Н20 — ТБФ — толуол

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Влияние температуры на распределение вещества в процес­сах экстракции рассматривалось неоднократно. Распределе­ние координационно-сольватированных соединений обычно ставят в большую зависимость от температуры, чем распреде­ление гидрато-сольватов ...

How to cite: Shikheeva L.V., Kosheleva T.A. // Journal of Mining Institute. 1970. Vol. 50. Iss. 3. p. 173.
Article
  • Date submitted
    1965-09-30
  • Date accepted
    1965-11-09

Complexation of copper (II) ions with naphthenic acids in organic solutions

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Naphthenic acids are good extractants for heavy non-ferrous metal ions, with each metal ion being extracted in a specific region of pH values. It has been shown that Cu2+ copper ions begin to be extracted at a pH of 3.2-3.7, depending on the concentration of copper in the aqueous phase, the concentration of naphthenic acid in the organic phase, and the ratio.

How to cite: Sheheeva L.V. Complexation of copper (II) ions with naphthenic acids in organic solutions // Journal of Mining Institute. 1966. Vol. 46. Iss. 3. p. 110-114.
Article
  • Date submitted
    1962-09-08
  • Date accepted
    1962-11-16

Extraction of some nonferrous metal ions by naphthenic acids

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Naphthenic acids are a component of oils, mainly naphthenic ones. The latter contain alicyclic hydrocarbons with five- and six-membered cycles. The composition and structure of naphthenic acids change from one oil fraction to another. Naphthenic acids obtained by alkaline treatment of gasoil and kerosene distillates contain mainly cyclopentane derivatives.

How to cite: Shikheeva L.V. Extraction of some nonferrous metal ions by naphthenic acids // Journal of Mining Institute. 1963. Vol. 42. Iss. 3. p. 71.