Effect of polymeric additives on properties of compound oils

Kuliev, A. B.; Kuliev, F. A.; Imanova, G. I.

doi:10.1007/bf00730993

Cited by 5 publications

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“…Thus, the water addition to the reaction medium leads to the dissociation (“increases” the strength) of organic acids formed at the initial stage of oxidation. As a result, intermediate rearrangement with the tertiary peroxide formation becomes possible; some oxidation reactions proceed according to the scheme shown in Figure , with the formation of phenols and/or higher alcohols, the presence of which in the hydrocarbon medium, even in small amounts (0.0005–0.1 wt %), significantly inhibits the oxidation rate of hydrocarbons. − That is, the inhibitory effect of water is shown not only in the stages of growth and chain branching, as described by many authors, but also due to a partial change in the oxidation mechanism.…”

Section: Resultsmentioning

confidence: 88%

“…For example, for phenolsulfonic acid (HOC 6 H 4 SO 3 H), p K a = 0.39; for HNO 3 , p K a = −1.64. 63 …”

Section: Resultsmentioning

confidence: 99%

“…It should also be noted that the p K a of sulfur-containing organic acids (possible oxidation products of sulfur compounds) in aqueous solution are very close to the p K a of inorganic acids. For example, for phenolsulfonic acid (HOC 6 H 4 SO 3 H), p K a = 0.39; for HNO 3 , p K a = −1.64 …”

Section: Resultsmentioning

confidence: 99%

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Influence of Water on Noncatalytic Oxidative Desulfurization of High-Sulfur Straight-Run Oil Fractions

et al. 2022

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The noncatalytic oxidative desulfurization process of straight-run kerosene and diesel fractions with high sulfur contents due to their treatment with air without using expensive catalysts and strong oxidants is considered. The research was carried out in a periodic mode in a bubble-type reactor with a volume of 1 × 10 –3 m 3 under the following conditions: 180–200 °C; 2.5–3.0 MPa; the process lasted for 20–30 min; the air/raw material ratio was 1.6–2.2 m 3 /min per 1 m 3 of raw material. The process can be used to obtain industrial jet fuels and diesel fuel components with good lubricating properties. The possibility and expediency of carrying out the process in the presence of water have been studied. The ratio of water/raw materials (vol.) varied from 0:1 to 2:1. It was proven that the water presence in the reaction medium has a positive effect on the studied process and decreases the oxidation intensity of hydrocarbon medium by 2–4 times. This is due to both the slowing of oxidation reactions by water during peroxide decomposition and chain growth and branching and the partial change in chemical oxidation with the formation of phenols and/or tertiary alcohols, which are inhibitors of oxidation reactions. On the other hand, water has almost no effect on the removal degree of sulfur compounds.

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Section: Resultsmentioning

confidence: 88%

“…For example, for phenolsulfonic acid (HOC 6 H 4 SO 3 H), p K a = 0.39; for HNO 3 , p K a = −1.64. 63 …”

Section: Resultsmentioning

confidence: 99%