TY  - JOUR
AU  - Milentijević, Goran
AU  - Marinković, Aleksandar D.
AU  - Rančić, Milica
AU  - Bogdanović, Aleksandra
AU  - Prlainović, Nevena
AU  - Marković, Smiljana
AU  - Milosavljević, Milutin
PY  - 2021
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/1193
AB  - The specific objectives of the presented study were related to the optimization of the production process of N-alkyl-, N,N-dialkyl-, and N-cycloalkyl-O-isobutyl thiocarbamate; trial industrial production of N-ethyl-O-isobutyl thiocarbamate; and the evaluation of flotation efficiency of N-ethyl-O-isobutyl thiocarbamate using a real ore sample. The optimization of thiocarbamate syntheses were performed by varying the molar ratio of isobutyl alcohol, carbon disulfide, potassium hydroxide, reaction time, and reaction temperature. In the first step, one-pot reaction took place to produce alkyl xanthate and was followed with chlorination to give alkyl chloroformate (O-alkyl carbonochloridothioate); finally, thiocarbamates were obtained by the reaction with corresponding amines. N-alkyl-O-ethyl thiocarbamate was synthesized as a comparative flotation agent. The structure of the synthesized compounds was confirmed by IR, H-1 and C-13 NMR, and MS instrumental methods, and the purity was determined by gas chromatographic method and elemental analysis. The optimized methods gave high-purity products in a significant yield that was also confirmed by semi-industrial production of N-ethyl-O-isobutyl thiocarbamate. The optimized thiocarbamate synthesis, without isolation of intermediates, is of great importance from the aspect of green technologies. Flotation efficiency test results, using real copper and zinc ores, showed the highest activity of N-ethyl-O-isobutyl thiocarbamate. The optimal one-pot thiocarbamate synthesis provides a simple procedure with a high conversion degree, and, thus, offers valuable technology applicable at the industrial scale.
T2  - Minerals
T1  - New Facile One-Pot Synthesis of Isobutyl Thiocarbamate in Recycling Solvent Mixture
IS  - 12
VL  - 11
DO  - 10.3390/min11121346
UR  - conv_1605
ER  - 

@article{
author = "Milentijević, Goran and Marinković, Aleksandar D. and Rančić, Milica and Bogdanović, Aleksandra and Prlainović, Nevena and Marković, Smiljana and Milosavljević, Milutin",
year = "2021",
abstract = "The specific objectives of the presented study were related to the optimization of the production process of N-alkyl-, N,N-dialkyl-, and N-cycloalkyl-O-isobutyl thiocarbamate; trial industrial production of N-ethyl-O-isobutyl thiocarbamate; and the evaluation of flotation efficiency of N-ethyl-O-isobutyl thiocarbamate using a real ore sample. The optimization of thiocarbamate syntheses were performed by varying the molar ratio of isobutyl alcohol, carbon disulfide, potassium hydroxide, reaction time, and reaction temperature. In the first step, one-pot reaction took place to produce alkyl xanthate and was followed with chlorination to give alkyl chloroformate (O-alkyl carbonochloridothioate); finally, thiocarbamates were obtained by the reaction with corresponding amines. N-alkyl-O-ethyl thiocarbamate was synthesized as a comparative flotation agent. The structure of the synthesized compounds was confirmed by IR, H-1 and C-13 NMR, and MS instrumental methods, and the purity was determined by gas chromatographic method and elemental analysis. The optimized methods gave high-purity products in a significant yield that was also confirmed by semi-industrial production of N-ethyl-O-isobutyl thiocarbamate. The optimized thiocarbamate synthesis, without isolation of intermediates, is of great importance from the aspect of green technologies. Flotation efficiency test results, using real copper and zinc ores, showed the highest activity of N-ethyl-O-isobutyl thiocarbamate. The optimal one-pot thiocarbamate synthesis provides a simple procedure with a high conversion degree, and, thus, offers valuable technology applicable at the industrial scale.",
journal = "Minerals",
title = "New Facile One-Pot Synthesis of Isobutyl Thiocarbamate in Recycling Solvent Mixture",
number = "12",
volume = "11",
doi = "10.3390/min11121346",
url = "conv_1605"
}

Milentijević, G., Marinković, A. D., Rančić, M., Bogdanović, A., Prlainović, N., Marković, S.,& Milosavljević, M.. (2021). New Facile One-Pot Synthesis of Isobutyl Thiocarbamate in Recycling Solvent Mixture. in Minerals, 11(12).
https://doi.org/10.3390/min11121346
conv_1605

Milentijević G, Marinković AD, Rančić M, Bogdanović A, Prlainović N, Marković S, Milosavljević M. New Facile One-Pot Synthesis of Isobutyl Thiocarbamate in Recycling Solvent Mixture. in Minerals. 2021;11(12).
doi:10.3390/min11121346
conv_1605 .

Milentijević, Goran, Marinković, Aleksandar D., Rančić, Milica, Bogdanović, Aleksandra, Prlainović, Nevena, Marković, Smiljana, Milosavljević, Milutin, "New Facile One-Pot Synthesis of Isobutyl Thiocarbamate in Recycling Solvent Mixture" in Minerals, 11, no. 12 (2021),
https://doi.org/10.3390/min11121346 .,
conv_1605 .

TY  - JOUR
AU  - Milosavljević, Milutin M.
AU  - Marinković, Aleksandar D.
AU  - Rančić, Milica
AU  - Milentijević, Goran
AU  - Bogdanović, Aleksandra
AU  - Cvijetić, Ilija N.
AU  - Guresić, Dejan
PY  - 2020
UR  - https://omorika.sfb.bg.ac.rs/handle/123456789/1151
AB  - An optimal laboratory two-step procedure was developed for sodium/potassium O-alkyl carbonodithioate (sodium/potassium alkyl xanthates) production in the form of aqueous solutions. Sodium isopropyl xanthate (Na-iPrX), as the most effective salt in a real ore flotation process, was also produced at an industrial level and introduced as a collector for copper ores. In order to reduce toxicity of the flotation process and improve sustainability by minimising environmental impacts, collector efficiency and selectivity in the flotation process were studied in relation to possible synergism of xanthates combined with the derived biomass and biodegradable green reagents levulinic acid, 5-hydroxymethyl-2-furanacrylic acid (HMFA), and condensation product of hydroxymethylfurfural and levulinic acid. Optimal content of 30% of HMFA in the collector pointed to the possibility of substitution of commercial xanthate collector without significantly affecting its efficiency/selectivity. The density functional theory (DFT) calculations provided insights into the interaction mechanism of Na-iPrX and HMFA with cooper. The benefits of the presented method highlight production simplicity, mild reaction conditions, high purity and yield of products, no by-products, and technological applicability on an industrial scale.
T2  - Minerals
T1  - New Eco-Friendly Xanthate-Based Flotation Agents
IS  - 4
VL  - 10
DO  - 10.3390/min10040350
UR  - conv_1491
ER  - 

@article{
author = "Milosavljević, Milutin M. and Marinković, Aleksandar D. and Rančić, Milica and Milentijević, Goran and Bogdanović, Aleksandra and Cvijetić, Ilija N. and Guresić, Dejan",
year = "2020",
abstract = "An optimal laboratory two-step procedure was developed for sodium/potassium O-alkyl carbonodithioate (sodium/potassium alkyl xanthates) production in the form of aqueous solutions. Sodium isopropyl xanthate (Na-iPrX), as the most effective salt in a real ore flotation process, was also produced at an industrial level and introduced as a collector for copper ores. In order to reduce toxicity of the flotation process and improve sustainability by minimising environmental impacts, collector efficiency and selectivity in the flotation process were studied in relation to possible synergism of xanthates combined with the derived biomass and biodegradable green reagents levulinic acid, 5-hydroxymethyl-2-furanacrylic acid (HMFA), and condensation product of hydroxymethylfurfural and levulinic acid. Optimal content of 30% of HMFA in the collector pointed to the possibility of substitution of commercial xanthate collector without significantly affecting its efficiency/selectivity. The density functional theory (DFT) calculations provided insights into the interaction mechanism of Na-iPrX and HMFA with cooper. The benefits of the presented method highlight production simplicity, mild reaction conditions, high purity and yield of products, no by-products, and technological applicability on an industrial scale.",
journal = "Minerals",
title = "New Eco-Friendly Xanthate-Based Flotation Agents",
number = "4",
volume = "10",
doi = "10.3390/min10040350",
url = "conv_1491"
}

Milosavljević, M. M., Marinković, A. D., Rančić, M., Milentijević, G., Bogdanović, A., Cvijetić, I. N.,& Guresić, D.. (2020). New Eco-Friendly Xanthate-Based Flotation Agents. in Minerals, 10(4).
https://doi.org/10.3390/min10040350
conv_1491

Milosavljević MM, Marinković AD, Rančić M, Milentijević G, Bogdanović A, Cvijetić IN, Guresić D. New Eco-Friendly Xanthate-Based Flotation Agents. in Minerals. 2020;10(4).
doi:10.3390/min10040350
conv_1491 .

Milosavljević, Milutin M., Marinković, Aleksandar D., Rančić, Milica, Milentijević, Goran, Bogdanović, Aleksandra, Cvijetić, Ilija N., Guresić, Dejan, "New Eco-Friendly Xanthate-Based Flotation Agents" in Minerals, 10, no. 4 (2020),
https://doi.org/10.3390/min10040350 .,
conv_1491 .