TY  - JOUR
AU  - Kodrić, Marija
AU  - Đorđević, Dragan
AU  - Konstantinović, Sandra
AU  - Kostić, Mirjana
AU  - Šarac, Tatjana
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5899
AB  - The results of the research on the ability of adsorption of dye on polyester fibers at a temperature of 98 °C are presented in this paper. The fibers were previously modified in aqueous solutions of NaOH, KOH or Al(OH)3. Typically, the dyeing of the fibers takes place at high temperatures and under pressure in the presence of the carrier. Previous processing before adsorption-dyeing, alkali hydrolysis, changes the surface morphology of polyester fibers. Based on dye exhaustion results, it was found that the dye adsorption on modified polyester fibers (degree of exhaustion 18.2 %, for a dye concentration of 200 mgdm-3 and adsorption time of 5 min) has been bigger than adsorption to unmodified fibers (degree of exhaustion 10 %, for a dye concentration of 200 mgdm-3 and adsorption time of 5 min). The five-parameter nonlinear model of Fritz-Schlunder is the most efficient in simulating isothermal adsorption of disperse dye on polyester fibers (the correlation coefficient is 0.995). Other adsorption models, Dubinin-Radushkevich, Marczewski-Jaroniec and Hill give poorer results and cannot be used to explain the adsorption of the disperse dye for polyester fibers (the correlation coefficients are 0.891, 0.922 and 0.973, respectively).
PB  - University of Novi Sad, Faculty of Technology
T2  - Acta Periodica Technologica
T1  - Modeling of disperse dye adsorption on modified polyester fibers
EP  - 7
SP  - 1
VL  - 51
DO  - 10.2298/APT2051001K
ER  - 

@article{
author = "Kodrić, Marija and Đorđević, Dragan and Konstantinović, Sandra and Kostić, Mirjana and Šarac, Tatjana",
year = "2020",
abstract = "The results of the research on the ability of adsorption of dye on polyester fibers at a temperature of 98 °C are presented in this paper. The fibers were previously modified in aqueous solutions of NaOH, KOH or Al(OH)3. Typically, the dyeing of the fibers takes place at high temperatures and under pressure in the presence of the carrier. Previous processing before adsorption-dyeing, alkali hydrolysis, changes the surface morphology of polyester fibers. Based on dye exhaustion results, it was found that the dye adsorption on modified polyester fibers (degree of exhaustion 18.2 %, for a dye concentration of 200 mgdm-3 and adsorption time of 5 min) has been bigger than adsorption to unmodified fibers (degree of exhaustion 10 %, for a dye concentration of 200 mgdm-3 and adsorption time of 5 min). The five-parameter nonlinear model of Fritz-Schlunder is the most efficient in simulating isothermal adsorption of disperse dye on polyester fibers (the correlation coefficient is 0.995). Other adsorption models, Dubinin-Radushkevich, Marczewski-Jaroniec and Hill give poorer results and cannot be used to explain the adsorption of the disperse dye for polyester fibers (the correlation coefficients are 0.891, 0.922 and 0.973, respectively).",
publisher = "University of Novi Sad, Faculty of Technology",
journal = "Acta Periodica Technologica",
title = "Modeling of disperse dye adsorption on modified polyester fibers",
pages = "7-1",
volume = "51",
doi = "10.2298/APT2051001K"
}

Kodrić, M., Đorđević, D., Konstantinović, S., Kostić, M.,& Šarac, T.. (2020). Modeling of disperse dye adsorption on modified polyester fibers. in Acta Periodica Technologica
University of Novi Sad, Faculty of Technology., 51, 1-7.
https://doi.org/10.2298/APT2051001K

Kodrić M, Đorđević D, Konstantinović S, Kostić M, Šarac T. Modeling of disperse dye adsorption on modified polyester fibers. in Acta Periodica Technologica. 2020;51:1-7.
doi:10.2298/APT2051001K .

Kodrić, Marija, Đorđević, Dragan, Konstantinović, Sandra, Kostić, Mirjana, Šarac, Tatjana, "Modeling of disperse dye adsorption on modified polyester fibers" in Acta Periodica Technologica, 51 (2020):1-7,
https://doi.org/10.2298/APT2051001K . .

TY  - JOUR
AU  - Kodrić, Marija
AU  - Đorđević, Dragan
AU  - Konstantinović, Sandra
AU  - Kostić, Mirjana
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3509
AB  - This article discusses the process of modification of the polyester knitted fabric as a prerequisite for successful dyeing at a lower temperature and without the presence of the carrier. The processing preceding dyeing, alkali-alcohol hydrolysis with ultrasound, changes the surface morphology causing the peeling and cracks on the surface of polyester fibres of the knitted fabric, decreases the mass and thickness of the knitted fabric, improves the sorption features, capillarity and absorption of water and soaking. The process of dyeing of the modified polyester knitted fabric in the presence of ultrasound at the lower temperature gives much better results than dyeing without ultrasound, and it is very close to the standard process of dyeing of a raw sample at the higher temperature. By increasing the concentration, the level of dye exhaustion per mass unit of the knitted fabric decreases. At the highest applied dye concentrations and the longest dyeing, the biggest dye adsorption happens.
AB  - U ovom članku se govori o procesu modifikacije poliestarske pletenine kao preduslova za uspešno bojenje na nižim temperaturama i bez prisustva kerijera. Prethodna obrada pre bojenja, alkalno-alkoholna hidroliza sa ultrazvukom, menja površinsku morfologiju, izaziva piling i pukotine na površini poliestarskih vlakana pletenine, smanjuje masu i debljinu, poboljšava svojstva sorpcije, kapilarnost i apsorpciju vode kao i kvašenje pletenine. Proces bojenja modifikovane poliesterske pletenine u prisustvu ultrazvuka na nižim temperaturama daje mnogo bolje rezultate od bojenja bez ultrazvuka i veoma je blizu standardnom procesu bojenja sirovog uzorka na višoj temperaturi. Povećanjem koncentracije smanjuje se iscrpljenje boje po jedinici mase pletenine. Kod najviše primenjene koncentracije boje i najdužeg bojenja, dešava se najveća adsorpcija boje.
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Advanced Technologies
T1  - The modification of the polyester knitted fabric for more economic dyeing
T1  - Modifikacija poliestarske pletenine za ekonomičnije bojenje
EP  - 66
IS  - 2
SP  - 60
VL  - 6
DO  - 10.5937/savteh1702060K
ER  - 

@article{
author = "Kodrić, Marija and Đorđević, Dragan and Konstantinović, Sandra and Kostić, Mirjana",
year = "2017",
abstract = "This article discusses the process of modification of the polyester knitted fabric as a prerequisite for successful dyeing at a lower temperature and without the presence of the carrier. The processing preceding dyeing, alkali-alcohol hydrolysis with ultrasound, changes the surface morphology causing the peeling and cracks on the surface of polyester fibres of the knitted fabric, decreases the mass and thickness of the knitted fabric, improves the sorption features, capillarity and absorption of water and soaking. The process of dyeing of the modified polyester knitted fabric in the presence of ultrasound at the lower temperature gives much better results than dyeing without ultrasound, and it is very close to the standard process of dyeing of a raw sample at the higher temperature. By increasing the concentration, the level of dye exhaustion per mass unit of the knitted fabric decreases. At the highest applied dye concentrations and the longest dyeing, the biggest dye adsorption happens., U ovom članku se govori o procesu modifikacije poliestarske pletenine kao preduslova za uspešno bojenje na nižim temperaturama i bez prisustva kerijera. Prethodna obrada pre bojenja, alkalno-alkoholna hidroliza sa ultrazvukom, menja površinsku morfologiju, izaziva piling i pukotine na površini poliestarskih vlakana pletenine, smanjuje masu i debljinu, poboljšava svojstva sorpcije, kapilarnost i apsorpciju vode kao i kvašenje pletenine. Proces bojenja modifikovane poliesterske pletenine u prisustvu ultrazvuka na nižim temperaturama daje mnogo bolje rezultate od bojenja bez ultrazvuka i veoma je blizu standardnom procesu bojenja sirovog uzorka na višoj temperaturi. Povećanjem koncentracije smanjuje se iscrpljenje boje po jedinici mase pletenine. Kod najviše primenjene koncentracije boje i najdužeg bojenja, dešava se najveća adsorpcija boje.",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Advanced Technologies",
title = "The modification of the polyester knitted fabric for more economic dyeing, Modifikacija poliestarske pletenine za ekonomičnije bojenje",
pages = "66-60",
number = "2",
volume = "6",
doi = "10.5937/savteh1702060K"
}

Kodrić, M., Đorđević, D., Konstantinović, S.,& Kostić, M.. (2017). The modification of the polyester knitted fabric for more economic dyeing. in Advanced Technologies
Univerzitet u Nišu - Tehnološki fakultet, Leskovac., 6(2), 60-66.
https://doi.org/10.5937/savteh1702060K

Kodrić M, Đorđević D, Konstantinović S, Kostić M. The modification of the polyester knitted fabric for more economic dyeing. in Advanced Technologies. 2017;6(2):60-66.
doi:10.5937/savteh1702060K .

Kodrić, Marija, Đorđević, Dragan, Konstantinović, Sandra, Kostić, Mirjana, "The modification of the polyester knitted fabric for more economic dyeing" in Advanced Technologies, 6, no. 2 (2017):60-66,
https://doi.org/10.5937/savteh1702060K . .

TY  - JOUR
AU  - Milosavljević, Milutin M.
AU  - Mijin, Dušan
AU  - Konstantinović, Sandra
AU  - Elezović, Nataša M.
AU  - Takić, Ljiljana
AU  - Dražević, Ljubinka
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2628
AB  - Flotation reagents can be transformed to industrial waste if they are stored for a long period of time. Also, if synthesis or drying process is not performed under defined conditions in industrial plants, which produce flotation reagents, batch of waste may arise and be stored as a waste. The chemical composition of this waste depends on the phase in which it was created, but typically includes: unreacted alkali hydroxide, solvent - alcohol and trithiocarbonate and oxidation product - dixanthogenate. In this paper a new laboratory procedure for the treatment of such wastes is described. the identification and separation of industrial waste components is also included. From the separated dixantogenate and xanthate a laboratory synthesis of thioncarbamates is given. In addition, a semi-industrial treatment of waste xanthate is presented. Synthesis of N-alkyl and N,N-dialkyl-O-isobutylthioncarbamates were obtained from the filtrate obtained in the first step. As a by-product, sodium thioglycolate was produced. This by-product is transformed to a thioglycolic acid by the addition of an acid. Also, the synthesis of thioncarbamates from dixanthogenates, isolated from industrial waste as a cake, is desribed. Described waste treatment is additionally interesting due to the production of sulphur as another by-product. laboratory synthesis gave thioncarbamates in yields from 69.7 to 87.7%, while the semi-industrial process for the selected batches produced thioncarbamates in yields from 74.2 to 80.5%. Taking into account the importance of the synthesized compounds as selective flotation reagents, a new procedure of their synthesis from industrial waste is characterized by good yields and purity of the obtained compounds, the simplicity of process, low environmental impact and short reaction times of synthesis.
AB  - U ovom radu je opisan novi laboratorijski postupak prerade industrijskog otpada na bazi ksantata i dat poluindustrijski postupak prerade sa definisanim tehnološkim parametrima. U prvoj fazi prerade se izdvajaju komponente koje ulaze u sastav otpadnog ksantata. Druga faza prerade predstavlja tretman izdvojenih komponenata u prvoj fazi, pri čemu se izdvojeni ksantati i diksantogenati upotrebljavaju za sintezu alkiltionkarbamata, koji nalaze primenu u flotaciji kao selektivni flotoreagensi. Laboratorijskim postupkom prerade dobijeni su tionkarbamati u prinosu od 69,7-87,7%, dok se poluindustrijskim postupkom, za odabrane šarže odgovarajućeg sastava, tionkarbamati dobijaju u prinosu od 74,2-80,5%.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - A new procedure for the treatment of an industrial waste containing flotation reagents
T1  - Novi postupak prerade industrijskog otpada koji sadrži flotoreagense na bazi ksantata
EP  - 339
IS  - 3
SP  - 331
VL  - 68
DO  - 10.2298/HEMIND130618059M
ER  - 

@article{
author = "Milosavljević, Milutin M. and Mijin, Dušan and Konstantinović, Sandra and Elezović, Nataša M. and Takić, Ljiljana and Dražević, Ljubinka",
year = "2014",
abstract = "Flotation reagents can be transformed to industrial waste if they are stored for a long period of time. Also, if synthesis or drying process is not performed under defined conditions in industrial plants, which produce flotation reagents, batch of waste may arise and be stored as a waste. The chemical composition of this waste depends on the phase in which it was created, but typically includes: unreacted alkali hydroxide, solvent - alcohol and trithiocarbonate and oxidation product - dixanthogenate. In this paper a new laboratory procedure for the treatment of such wastes is described. the identification and separation of industrial waste components is also included. From the separated dixantogenate and xanthate a laboratory synthesis of thioncarbamates is given. In addition, a semi-industrial treatment of waste xanthate is presented. Synthesis of N-alkyl and N,N-dialkyl-O-isobutylthioncarbamates were obtained from the filtrate obtained in the first step. As a by-product, sodium thioglycolate was produced. This by-product is transformed to a thioglycolic acid by the addition of an acid. Also, the synthesis of thioncarbamates from dixanthogenates, isolated from industrial waste as a cake, is desribed. Described waste treatment is additionally interesting due to the production of sulphur as another by-product. laboratory synthesis gave thioncarbamates in yields from 69.7 to 87.7%, while the semi-industrial process for the selected batches produced thioncarbamates in yields from 74.2 to 80.5%. Taking into account the importance of the synthesized compounds as selective flotation reagents, a new procedure of their synthesis from industrial waste is characterized by good yields and purity of the obtained compounds, the simplicity of process, low environmental impact and short reaction times of synthesis., U ovom radu je opisan novi laboratorijski postupak prerade industrijskog otpada na bazi ksantata i dat poluindustrijski postupak prerade sa definisanim tehnološkim parametrima. U prvoj fazi prerade se izdvajaju komponente koje ulaze u sastav otpadnog ksantata. Druga faza prerade predstavlja tretman izdvojenih komponenata u prvoj fazi, pri čemu se izdvojeni ksantati i diksantogenati upotrebljavaju za sintezu alkiltionkarbamata, koji nalaze primenu u flotaciji kao selektivni flotoreagensi. Laboratorijskim postupkom prerade dobijeni su tionkarbamati u prinosu od 69,7-87,7%, dok se poluindustrijskim postupkom, za odabrane šarže odgovarajućeg sastava, tionkarbamati dobijaju u prinosu od 74,2-80,5%.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "A new procedure for the treatment of an industrial waste containing flotation reagents, Novi postupak prerade industrijskog otpada koji sadrži flotoreagense na bazi ksantata",
pages = "339-331",
number = "3",
volume = "68",
doi = "10.2298/HEMIND130618059M"
}

Milosavljević, M. M., Mijin, D., Konstantinović, S., Elezović, N. M., Takić, L.,& Dražević, L.. (2014). A new procedure for the treatment of an industrial waste containing flotation reagents. in Hemijska industrija
Association of Chemical Engineers of Serbia., 68(3), 331-339.
https://doi.org/10.2298/HEMIND130618059M

Milosavljević MM, Mijin D, Konstantinović S, Elezović NM, Takić L, Dražević L. A new procedure for the treatment of an industrial waste containing flotation reagents. in Hemijska industrija. 2014;68(3):331-339.
doi:10.2298/HEMIND130618059M .

Milosavljević, Milutin M., Mijin, Dušan, Konstantinović, Sandra, Elezović, Nataša M., Takić, Ljiljana, Dražević, Ljubinka, "A new procedure for the treatment of an industrial waste containing flotation reagents" in Hemijska industrija, 68, no. 3 (2014):331-339,
https://doi.org/10.2298/HEMIND130618059M . .

TY  - JOUR
AU  - Sovrlić, Milica
AU  - Milosavljević, Milutin M.
AU  - Marinković, Aleksandar
AU  - Đukanović, Jasmina S.
AU  - Brković, Danijela V.
AU  - Konstantinović, Sandra
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1795
AB  - An optimized synthesis of N-alkyl, N,N-dialkyl- and N-cycloalkyl-O-isobutyl thioncarbamates by aminolysis of sodium isobutylxanthogenic acid (NaiBXAc) and primary, secondary and cycloalkyl amines was developed at laboratory scale and applied at semi-industrial level. Studies on dependence of N-n-propyl-O-isopropylthiocarbamate yield and purity with respect to reaction parameters: reaction time and molar ratio of n-propylamine and NaiBXAc, were performed. In such way, optimal reaction conditions for synthesis of N-alkyl, N,N-dialkyl- and N-cycloalkyl- O-isobutyl thioncarbamates, by aminolysis of NaiBXAc, were established. Also, comparative results of thioncarbamates synthesis starting from potassium isobutyl xanthate (KiBX) and corresponding amines in presence of different oxidants (hydrogen peroxide, sodium hypochlorite and new oxidative agent potassium peroxodisulfate) were evaluated. The synthesized compounds have been fully characterized by FTIR, 1H- and 13C-NMR and MS data, elemental analysis and purity have been determined by gas chromatographic method (GC). To our knowledge, ten synthesized thioncarbamates are here characterized for the first time. The synthesized compounds could be used as selective reagents for flotation of copper and zinc ores. The presented methods offer several benefits, namely, high product yields and purity, simple operation, mild reaction conditions without use of hazardous organic solvents, while some of them could be implemented on industrial scale production.
AB  - U radu je prikazana optimizovana sinteza N-alkil-, N,N-dialkil- i N-cikloalkil-O-izobutiltionkarbamata reakcijom aminolize natrijum-izobutilksantogenacetata (NaiBXAc) i primarnih, sekundarnih i cikloalkilamina. Takođe, dat je pregled uporednih postupaka sinteze tionkarbamata polazeći od kalijum-izobutilksantata (KiBX) i odgovarajućih amina u prisustvu različitih oksidacionih sredstava: vodonik-peroksida, natrijum-hipohlorita i kalijum-peroksodisulfata kao novog oksidacionog sredstva. Struktura sintetisanih jedinjenja potvrđena je FTIR, 1H- i 13C-NMR i MS instrumentalnim metodama i elementarnom analizom, a čistoća je određena gasnom hromatografskom metodom. Deset sintetisanih tionkarbamata su prvi put okarakterisani i predstavljaju nova jedinjenja. Sintetisana jedinjenja mogu naći primenu kao selektivni reagensi za flotaciju rude bakra i cinka. Opisane postupke karakteriše visok stepen konverzije i čistoća proizvoda, blagi reakcioni uslovi bez upotrebe organskih rastvarača kao reakcionog medijuma, a neki su tehnološki primenljivi na industrijskom nivou proizvodnje.
PB  - Association of Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Comparative analysis of oxidative synthesis of N-alkyl, N,N-dialkyl and N-cykloalkyl-O-isobutyl thioncarbamate
T1  - Uporedna analiza oksidativnih postupaka sinteze N-alkil, N,N-dialkil i N-cikloalkil-O-izobutil tionkarbamata
EP  - 549
IS  - 5
SP  - 541
VL  - 65
DO  - 10.2298/HEMIND110504038S
ER  - 

@article{
author = "Sovrlić, Milica and Milosavljević, Milutin M. and Marinković, Aleksandar and Đukanović, Jasmina S. and Brković, Danijela V. and Konstantinović, Sandra",
year = "2011",
abstract = "An optimized synthesis of N-alkyl, N,N-dialkyl- and N-cycloalkyl-O-isobutyl thioncarbamates by aminolysis of sodium isobutylxanthogenic acid (NaiBXAc) and primary, secondary and cycloalkyl amines was developed at laboratory scale and applied at semi-industrial level. Studies on dependence of N-n-propyl-O-isopropylthiocarbamate yield and purity with respect to reaction parameters: reaction time and molar ratio of n-propylamine and NaiBXAc, were performed. In such way, optimal reaction conditions for synthesis of N-alkyl, N,N-dialkyl- and N-cycloalkyl- O-isobutyl thioncarbamates, by aminolysis of NaiBXAc, were established. Also, comparative results of thioncarbamates synthesis starting from potassium isobutyl xanthate (KiBX) and corresponding amines in presence of different oxidants (hydrogen peroxide, sodium hypochlorite and new oxidative agent potassium peroxodisulfate) were evaluated. The synthesized compounds have been fully characterized by FTIR, 1H- and 13C-NMR and MS data, elemental analysis and purity have been determined by gas chromatographic method (GC). To our knowledge, ten synthesized thioncarbamates are here characterized for the first time. The synthesized compounds could be used as selective reagents for flotation of copper and zinc ores. The presented methods offer several benefits, namely, high product yields and purity, simple operation, mild reaction conditions without use of hazardous organic solvents, while some of them could be implemented on industrial scale production., U radu je prikazana optimizovana sinteza N-alkil-, N,N-dialkil- i N-cikloalkil-O-izobutiltionkarbamata reakcijom aminolize natrijum-izobutilksantogenacetata (NaiBXAc) i primarnih, sekundarnih i cikloalkilamina. Takođe, dat je pregled uporednih postupaka sinteze tionkarbamata polazeći od kalijum-izobutilksantata (KiBX) i odgovarajućih amina u prisustvu različitih oksidacionih sredstava: vodonik-peroksida, natrijum-hipohlorita i kalijum-peroksodisulfata kao novog oksidacionog sredstva. Struktura sintetisanih jedinjenja potvrđena je FTIR, 1H- i 13C-NMR i MS instrumentalnim metodama i elementarnom analizom, a čistoća je određena gasnom hromatografskom metodom. Deset sintetisanih tionkarbamata su prvi put okarakterisani i predstavljaju nova jedinjenja. Sintetisana jedinjenja mogu naći primenu kao selektivni reagensi za flotaciju rude bakra i cinka. Opisane postupke karakteriše visok stepen konverzije i čistoća proizvoda, blagi reakcioni uslovi bez upotrebe organskih rastvarača kao reakcionog medijuma, a neki su tehnološki primenljivi na industrijskom nivou proizvodnje.",
publisher = "Association of Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Comparative analysis of oxidative synthesis of N-alkyl, N,N-dialkyl and N-cykloalkyl-O-isobutyl thioncarbamate, Uporedna analiza oksidativnih postupaka sinteze N-alkil, N,N-dialkil i N-cikloalkil-O-izobutil tionkarbamata",
pages = "549-541",
number = "5",
volume = "65",
doi = "10.2298/HEMIND110504038S"
}

Sovrlić, M., Milosavljević, M. M., Marinković, A., Đukanović, J. S., Brković, D. V.,& Konstantinović, S.. (2011). Comparative analysis of oxidative synthesis of N-alkyl, N,N-dialkyl and N-cykloalkyl-O-isobutyl thioncarbamate. in Hemijska industrija
Association of Chemical Engineers of Serbia., 65(5), 541-549.
https://doi.org/10.2298/HEMIND110504038S

Sovrlić M, Milosavljević MM, Marinković A, Đukanović JS, Brković DV, Konstantinović S. Comparative analysis of oxidative synthesis of N-alkyl, N,N-dialkyl and N-cykloalkyl-O-isobutyl thioncarbamate. in Hemijska industrija. 2011;65(5):541-549.
doi:10.2298/HEMIND110504038S .

Sovrlić, Milica, Milosavljević, Milutin M., Marinković, Aleksandar, Đukanović, Jasmina S., Brković, Danijela V., Konstantinović, Sandra, "Comparative analysis of oxidative synthesis of N-alkyl, N,N-dialkyl and N-cykloalkyl-O-isobutyl thioncarbamate" in Hemijska industrija, 65, no. 5 (2011):541-549,
https://doi.org/10.2298/HEMIND110504038S . .