Study of phosphorus-containing compounds as anti-seize and anti-wear additives for transmission and engine oils

2021 ◽  
Vol 05 ◽  
pp. 15-22
Author(s):  
N.N. Novotrozhina ◽  
◽  
Yu.B. Ramazanova ◽  
G.A. Gakhramanova ◽  
B.I. Musayeva ◽  
...  
Keyword(s):  
Functional Groups ◽  
Dithiophosphoric Acid ◽  
Lubricating Oils ◽  
Engine Oils ◽  
Phosphorus Containing ◽  
Acid Esters ◽  
Petroleum Oils

Dithiophosphoric acid esters containing various functional groups have been synthesized. On the basis of allyloxybenzyl- and allyloxymethylbenzylchlorides, as well as sodium diisopropyldithiophosphate, allyloxybenzyl- and allyloxymethylbenzyldialkyldithiophosphates were obtained, respectively. 5-methyl-2-hydroxyphenylcarbonylmethyldiisopropyldithiophosphate was synthesized by the interaction of 5-methyl-2-hydroxy-chloroacetophenone and sodium diisopropyldithiophosphate. The synthesized compounds were studied as anti-wear and anti-seize additives for lubricating oils. Were also investigated their thermo-oxidative and anticorrosive properties. It was found that all synthesized compounds provide an improvement in the anti-wear and anti-seize properties of petroleum oils, and the efficiency depends on the presence of certain functional groups in the molecules of additives.

scholarly journals Development of variously functionalized nitrile oxides

2015 ◽  
Vol 11 ◽  
pp. 1241-1245 ◽  
Author(s):  
Haruyasu Asahara ◽  
Keita Arikiyo ◽  
Nagatoshi Nishiwaki
Keyword(s):  
Carboxylic Acid ◽  
Nucleophilic Substitution ◽  
Functional Groups ◽  
Grignard Reagent ◽  
Cycloaddition Reaction ◽  
Chemical Transformations ◽  
Nitrile Oxides ◽  
Weinreb Amide ◽  
Isoxazole Derivatives ◽  
Acid Esters

N-Methylated amides (N,4-dimethylbenzamide and N-methylcyclohexanecarboxamide) were systematically subjected to chemical transformations, namely, N-tosylation followed by nucleophilic substitution. The amide function was converted to the corresponding carboxylic acid, esters, amides, aldehyde, and ketone upon treatment with hydroxide, alkoxide, amine, diisobutylaluminium hydride and Grignard reagent, respectively. In these transformations, N-methyl-N-tosylcarboxamides behave like a Weinreb amide. Similarly, N-methyl-5-phenylisoxazole-3-carboxamide was converted into 3-functionalized isoxazole derivatives. Since the amide was prepared by the cycloaddition reaction of ethynylbenzene and N-methylcarbamoylnitrile oxide, the nitrile oxide served as the equivalent of the nitrile oxides bearing a variety of functional groups such as carboxy, alkoxycarbonyl, carbamoyl, acyl and formyl moieties.

Effect of magnetic field on tribological performances of two lubricating oils with phosphorus-containing additives

2017 ◽  
Vol 30 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Zeqi Jiang ◽  
Jianhua Fang ◽  
Boshui Chen ◽  
Kecheng Gu
Keyword(s):  
Magnetic Field ◽  
Lubricating Oils ◽  
Phosphorus Containing

TRENDS IN THE PROCESS OF GREENING LUBRICANTS

Tribologia ◽  
2020 ◽  
Vol 290 (2) ◽  
pp. 91-98
Author(s):  
Wiesław ZWIERZYCKI ◽  
Kasper GÓRNY
Keyword(s):  
Global Warming ◽  
Environmentally Friendly ◽  
Technological Medium ◽  
Lubricating Oils ◽  
Engine Oils ◽  
Exchange Program ◽  
Production Processes ◽  
Harmful Substances ◽  
Global Exchange ◽  
The Impact

In this article, the authors have characterized the main activities that reduce the impact of lubricants on the environment. To begin with, new solutions in the area of engine oils that reduce the emission of harmful substances in exhaust gases (“Low SAPS” oils) were discussed. Next, the activities concerning the improvement of biodegradability of lubricating oils used in devices in Nature Reserves, as well as in all of the “open lubrication systems” were characterized. Another problem was related to the non-toxicity (and other derivative features) of lubricants that may have incidental contact with a sensitive technological medium in production processes (in the food, pharmaceutical, and cosmetics industries). The last issue that was discussed concerns the compatibility of compressor oils with refrigerants in connection with the global exchange program of Freon for more environmentally friendly substances (currently, mainly affecting global warming to a lesser extent).

A Novel Fluorocarbon Elastomer for High-Temperature Sealing Applications in Aggressive Motor-Oil Environments

1990 ◽  
Vol 63 (4) ◽  
pp. 516-522 ◽  
Author(s):  
W. M. Grootaert ◽  
R. E. Kolb ◽  
A. T. Worm
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Automotive Industry ◽  
Corrosion Inhibitors ◽  
Vinylidene Fluoride ◽  
Motor Oil ◽  
Aging Behavior ◽  
Lubricating Oils ◽  
Engine Oils ◽  
Operating Temperatures

Abstract The tendency in the automotive industry to use smaller engines has resulted in a situation where lubricating oils are exposed to higher operating temperatures. This is especially the case in countries where there is no restriction on highway speed. Amine-based additives present in the oils (e.g., as dispersants and corrosion inhibitors) tend to slowly attack the conventional fluorocarbon elastomer seals under these conditions. As a result of that attack, the seal becomes brittle and eventually fails. A novel fluorocarbon elastomer of vinylidene fluoride, tetrafluoroethylene, and propylene has shown excellent aging behavior in the laboratory toward many aggressive engine oils at elevated temperature. Its improved resistance as compared to conventional fluorocarbon elastomers is attributed to the replacement of hexafluoropropylene with propylene.

scholarly journals Comparative Study of Biochar Modified with Different Functional Groups for Efficient Removal of Pb(II) and Ni(II)

2021 ◽  
Author(s):  
Chengchen Liu ◽  
Jiaxin Lin ◽  
Haojia Chen ◽  
Wanjun Wang ◽  
Yan Yang
Keyword(s):  
Adsorption Capacity ◽  
Functional Groups ◽  
Ethylenediaminetetraacetic Acid ◽  
X Ray Diffraction ◽  
Modified Biochar ◽  
Hierarchical Porous ◽  
Phosphorus Containing ◽  
Removal Of Heavy Metals ◽  
Pseudo Second Order ◽  
Ft Ir

Abstract The potential application of biochar in water treatment is attracting interest due to its sustainability and low production cost. In the present study, H3PO4-modified biochar (H-PBC), ethylenediaminetetraacetic acid-modified biochar (E-PBC), and NaOH-modified biochar (O-PBC) were prepared for Ni(II) and Pb(II) adsorption in an aqueous solution. Scanning electron microscopy (SEM), X-ray diffraction analysis, Brunauer–Emmett–Teller analysis, and Fourier transform infrared (FT-IR) spectroscopy were employed to characterize the as-obtained samples, and their capacities for Ni(II) and Pb(II) adsorption were determined. SEM showed that H-PBC retained the hierarchical porous structure of pristine biochar, and projections were observed on its surface. FT-IR showed that H-PBC possessed abundant oxygen-containing and phosphorus-containing functional groups on the surface. H-PBC, E-PBC, and O-PBC all exhibited excellent performance at Ni(II) and Pb(II) adsorption with qmax values of 64.94 mg/g, 47.17 mg/g, and 60.24 mg/g, and 243.90 mg/g, 156.25 mg/g, and 192.31 mg/g, respectively, which were significantly higher than the adsorption capacity (19.80 mg/g and 38.31 mg/g) of pristine biochar. Pseudo-second order models suggested that the adsorption process was controlled by chemical adsorption. Regeneration analysis showed that H-PBC had superior reusability characteristics. H-PBC had a greater adsorption capacity than other adsorbents due to its large specific surface area, and abundant oxygen-containing and phosphorus-containing functional groups. The results obtained in this study suggest that H-PBC is a promising adsorbent for the removal of heavy metals from aqueous solutions.

Acidification of Gas Engine Oils: Characterisation by Sensors

2007 ◽  
Author(s):  
N. Doerr ◽  
C. Schneidhofer
Keyword(s):  
Combustion Process ◽  
Chemical Properties ◽  
Corrosive Wear ◽  
Thin Metal Film ◽  
Acid Number ◽  
Total Acid ◽  
Material Loss ◽  
Gas Engine ◽  
Lubricating Oils ◽  
Engine Oils

Recently, a number of sensor principles to measure physical and chemical properties of lubricating oils were investigated. The crucial property of lubricating oils for some applications is the degree of acidification as there is a correlation to corrosive wear of engine components. Corrosiveness is of particular importance for biogas engines due to the fact that bio-fuels are forming more aggressive components during the combustion process as in comparison with conventional fuels. Recent research showed that the corrosiveness of oil cannot be described sufficiently by conventional oil parameters such as total acid number and neutralization number. We propose a sensor concept using the effect of material loss of a thin metal film due to corrosion. The signal of the sensor being immersed in used gas engine oils with corrosive compounds showed good correlation with selected oil properties determined in the laboratory.

Comparative DFT study of structure, reactivity and IR spectra of phosphorus-containing dendrons with PNPS linkages, vinyl and azide functional groups

2015 ◽  
Vol 1091 ◽  
pp. 6-15 ◽  
Author(s):  
V.L. Furer ◽  
A.E. Vandyukov ◽  
J.P. Majoral ◽  
A.M. Caminade ◽  
S. Gottis ◽  
...  
Keyword(s):  
Ir Spectra ◽  
Functional Groups ◽  
Dft Study ◽  
Phosphorus Containing
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