Simultaneous thermal analysis-mass spectrometry on lubricant systems and additives

Ohrbach, K.-H.; Matuschek, G.; Kettrup, A.; Joachim, A.

doi:10.1016/0040-6031(90)80188-5

Cited by 14 publications

(6 citation statements)

References 5 publications

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“…The following weight loss of ∼15 wt % between 100 and 250°C may be attributed to vaporization of mineral spirits (13.5 wt % in starting solution). The subsequent mass loss of ∼11 wt %, which is accompanied by a large exothermic DSC signal around 400°C is ascribed to naphthenate decomposition/oxidation leading to ZnO. Again, the final residual weight of 4.0 wt % compares well with expected 4.5 wt % ZnO.…”

Section: Resultsmentioning

confidence: 77%

The role of microexplosions in flame spray synthesis for homogeneous nanopowders from low‐cost metal precursors

et al. 2015

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One of the most versatile and rapid manufacturing processes for a variety of nanopowders is flame spray pyrolysis (FSP). The production costs of this scalable process are largely controlled by the raw materials, pushing for the utilization of lowcost metal precursors. These, however, typically yield inhomogeneous products containing large particles up to micrometer size along with fine nanoparticles. Here, the release mechanism of nitrate and carboxylate precursors from spray droplets has been investigated by single-droplet combustion experiments and thermogravimetric analysis. The results show that neither precursor evaporation nor choice of solvents is prerequisite for homogeneous nanopowders but droplet microexplosions with continuing combustion. It is shown that even low-cost metal nitrates yield homogeneous nanopowders if precursors are formulated such that droplet microexplosions occur by internal superheating. The proposed precursor release mechanisms are verified with lab-and pilot-scale FSP, demonstrating that single-droplet combustion experiments can be employed to predict the product quality.

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Section: Resultsmentioning

confidence: 77%

The role of microexplosions in flame spray synthesis for homogeneous nanopowders from low‐cost metal precursors

et al. 2015

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“…Temperature-programmed aqueous liquefaction of lignite has been extended to supercritical conditions (258). Thermal analysis have proved efficient in characterizing lubricating oils (259,260). DSC has also been shown to be efficient in determining the volatility characteristics of petroleum fractions (261).…”

Section: Minerals and Energy-related Topicsmentioning

confidence: 99%

Thermal analysis

Dollimore¹

1992

Anal. Chem.

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“…Due to the synthesis and purifying challenges of long chains dialkyldithiophosphoric acids, their use in experiments was rare [2,4], although long chains dialkyldithiophosphoric acids are more easily transferred into the organic phase [5] and more stable against hydrolysis than the short-chain ones [6]. The well-known lubricant zinc dialkyldithiophosphate (ZDDTP) has been extensively investigated [7], but only a few articles have been published on the thermal properties of the other heavy metal dialkyldithiophosphates [8,9]. Similarly, there are only a few studies on Cd(II) dialkyldithiophosphates for its removal from aqueous solutions [10][11][12][13][14], but there are no articles on Cd(II) dinonyldithiophosphate.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Thermogravimetric Investigation of Cd(II) Dinonyldithiophosphate: Removal of Cadmium from Aqueous Solutions

Bırıcık

Gümgüm

2015

Journal of Chemistry

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Dinonyldithiophosphoric acid (HDDTP) was synthesised from the reaction of phosphorus pentasulphide and nonyl alcohol. Dinonyldithiophosphate complex of cadmium [Cd(DDTP)2] was prepared by mixing solutions of Cd(II) with HDDTP in ethanol at room temperature. The acid and its complex were characterised by elemental analysis and spectroscopy. The thermal behaviour of Cd(DNDTP)2was investigated by thermogravimetric analysis. Removal of Cd(II) from aqueous media by HDDTP solution was also studied. The optimum conditions for removal of Cd(II) were investigated for effects of solvent, pH, contact time, concentration, and inorganic anions. Cd(II) was quantitatively removed from aqueous solutions at the pH range of0.5<pH<6, under the conditions that the stoichiometric ratio of HDDTP/Cd(II) ≥2/1. It can be stated that contact of the Cd(II) with HDDTP was sufficient for quantitative removing of cadmium from acidic aqueous solutions.

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Simultaneous thermal analysis-mass spectrometry on lubricant systems and additives

Cited by 14 publications

References 5 publications

The role of microexplosions in flame spray synthesis for homogeneous nanopowders from low‐cost metal precursors

The role of microexplosions in flame spray synthesis for homogeneous nanopowders from low‐cost metal precursors

Thermal analysis

Spectroscopic and Thermogravimetric Investigation of Cd(II) Dinonyldithiophosphate: Removal of Cadmium from Aqueous Solutions

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