63 research outputs found
TG study of the Li[0.4]Fe[2.4]Zn[0.2]O[4] ferrite synthesis
In this paper, the kinetic analysis of Li-Zn ferrite synthesis was studied using thermogravimetry (TG) method through the simultaneous application of non-linear regression to several measurements run at different heating rates (multivariate non-linear regression). Using TG-curves obtained for the four heating rates and Netzsch Thermokinetics software package, the kinetic models with minimal adjustable parameters were selected to quantitatively describe the reaction of Li-Zn ferrite synthesis. It was shown that the experimental TG-curves clearly suggest a two-step process for the ferrite synthesis and therefore a model-fitting kinetic analysis based on multivariate non-linear regressions was conducted. The complex reaction was described by a two-step reaction scheme consisting of sequential reaction steps. It is established that the best results were obtained using the Yander three-dimensional diffusion model at the first stage and Ginstling-Bronstein model at the second step. The kinetic parameters for lithium-zinc ferrite synthesis reaction were found and discussed
Synthesis of Sulphanylamides from New Derivatives of Aminopyrazoles
ΠΠ»Ρ Π½Π΅Π΄Π°Π²Π½ΠΎ ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
3-Π°ΡΠΈΠ»-5-ΠΌΠ΅ΡΠΎΠΊΡΠΈΠΌΠ΅ΡΠΈΠ»-4-Π°ΠΌΠΈΠ½ΠΎ-1Π-ΠΏΠΈΡΠ°Π·ΠΎΠ»ΠΎΠ² ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π°
ΡΠ΅Π°ΠΊΡΠΈΡ ΡΡΠ»ΡΡΠΎΠ½ΠΈΠ»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΠΎ Π°ΠΌΠΈΠ½ΠΎΠ³ΡΡΠΏΠΏΠ΅ ΠΏ-Π°ΡΠ΅ΡΠ°ΠΌΠΈΠ΄ΠΎΠ±Π΅Π½Π·ΠΎΠ»ΡΡΠ»ΡΡΠΎΡ
Π»ΠΎΡΠΈΠ΄ΠΎΠΌ. Π
ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ Π²ΠΏΠ΅ΡΠ²ΡΠ΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ ΡΡΠ»ΡΡΠ°Π½ΠΈΠ»Π°ΠΌΠΈΠ΄Π½ΡΠ΅ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΠ΅ Π·Π°ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
Π°ΠΌΠΈΠ½ΠΎΠΏΠΈΡΠ°Π·ΠΎΠ»ΠΎΠ²,
ΠΈΠ΄Π΅Π½ΡΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΠ-, Π―ΠΠ 1Π-ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΠΈ ΠΈ ΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΠΈFor the newly synthesized 3-aryl-5-methoxymethyl-4-amino-1H-pyrazoles the sulfonylation reaction
of the amino group by p-acetamidobenzenesulfonyl chloride was carried out. As a result, sulfanilamide
derivatives of substituted aminopyrazoles identified using NMR1H, IR spectroscopy and mass
spectrometry were obtained for the first tim
New Sulfamides Based on 1-Izopropil-3-Ξ±-Naftyl-5- Methoxymethyl-4-Aminopyrazole and Determination of Their Structure
ΠΠ»Ρ ΡΠ°Π½Π΅Π΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Π½ΠΎΠ³ΠΎ 1-ΠΈΠ·ΠΎΠΏΡΠΎΠΏΠΈΠ»-3-Ξ±-Π½Π°ΡΡΠΈΠ»-5-ΠΌΠ΅ΡΠΎΠΊΡΠΈΠΌΠ΅ΡΠΈΠ»-4-Π½ΠΈΡΡΠΎΠ·ΠΎΠΏΠΈΡΠ°Π·ΠΎΠ»Π°
ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½Π° ΡΠ΅Π°ΠΊΡΠΈΡ Π²ΠΎΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΈΡ Π³ΠΈΠ΄ΡΠ°Π·ΠΈΠ½Π³ΠΈΠ΄ΡΠ°ΡΠΎΠΌ. ΠΠΏΠ΅ΡΠ²ΡΠ΅ Π±ΡΠ» ΡΠΈΠ½ΡΠ΅Π·ΠΈΡΠΎΠ²Π°Π½
1-ΠΈΠ·ΠΎΠΏΡΠΎΠΏΠΈΠ»-3-Ξ±-Π½Π°ΡΡΠΈΠ»-5-ΠΌΠ΅ΡΠΎΠΊΡΠΈΠΌΠ΅ΡΠΈΠ»-4-Π°ΠΌΠΈΠ½ΠΎΠΏΠΈΡΠ°Π·ΠΎΠ», ΠΊΠΎΡΠΎΡΡΠΉ Π·Π°ΡΠ΅ΠΌ ΡΡΠ»ΡΡΠΎΠ½ΠΈΠ»ΠΈΡΠΎΠ²Π°Π»ΠΈ
ΠΏ-Π°ΡΠ΅ΡΠ°ΠΌΠΈΠ΄ΠΎΠ±Π΅Π½Π·ΠΎΠ»ΡΡΠ»ΡΡΠΎΡ
Π»ΠΎΡΠΈΠ΄ΠΎΠΌ ΠΈ ΠΏ-ΡΠΎΠ»ΡΠΎΠ»ΡΡΠ»ΡΡΠΎΡ
Π»ΠΎΡΠΈΠ΄ΠΎΠΌ. Π ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠ΅ ΠΏΠΎΠ»ΡΡΠ΅Π½Ρ
ΡΠ°Π½Π΅Π΅ Π½Π΅ΠΈΠ·Π²Π΅ΡΡΠ½ΡΠ΅ ΡΡΠ»ΡΡΠΎΠ½ΠΈΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄Π½ΡΠ΅ N-Π°Π»ΠΊΠΈΠ»ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
Π°ΠΌΠΈΠ½ΠΎΠΏΠΈΡΠ°Π·ΠΎΠ»ΠΎΠ².
Π‘ΠΎΡΡΠ°Π² ΠΈ ΡΡΡΠΎΠ΅Π½ΠΈΠ΅ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π΅Π½Ρ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌΠΈ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌΠΈ Π°Π½Π°Π»ΠΈΠ·Π°, ΡΠ°ΠΊΠΈΠΌΠΈ ΠΊΠ°ΠΊ ΠΠ-, Π―ΠΠ
1Π-ΡΠΏΠ΅ΠΊΡΡΠΎΡΠΊΠΎΠΏΠΈΡ ΠΈ ΠΌΠ°ΡΡ-ΡΠΏΠ΅ΠΊΡΡΠΎΠΌΠ΅ΡΡΠΈΡFor the previously obtained 1-isopropyl-3-Ξ±-naphthyl-5-methoxymethyl-4-nitrosopyrazole, a reduction
reaction with hydrazine hydrate was performed. It was first synthesized by 1-isopropyl-3-Ξ±-naphthyl-
5-methoxymethyl-4-aminopyrazole which was then sulfonylated by p-acetamidobenzenesulfonyl
chloride and p-toluenesulfonic chloride. As a result previously unknown sulfonylated derivatives of
N-alkylated aminopyrazoles were obtained. The composition and structure are confirmed by modern
methods of analysis such as IR, 1H NMR spectroscopy and mass spectrometr
Flow-Accelerated Corrosion Wear of Power-Generating Equipment: Investigations, Prediction, and Prevention: 1. Flow-Accelerated Corrosion Processes and Regularities
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