Autor: Milchert, E. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Adsorption of 1,2-dichloropropane from aqueous solution
Autorzy:: Pełech, R.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/779982.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: 1,2-dichloropropan
węgiel aktywny
adsorpcja
adsorbent polimerowy
ścieki
1,2-dichloropropane
activated carbon
adsorption
polymeric adsorbents
waste
Opis:: In this study dependences of the adsorption equilibrium of 1,2-dichloropropane in aqueous solution for six activated carbons (A, AG, AG5, DTO, WD-ekstra, CWZ-22) and four polymeric adsorbents (XE-563, XE-572, XE-340, XE-348) were presented. All the adsorption isotherms onto activated carbons were described by the Freundlich equation. To analyze the isotherms on the polymeric adsorbents the Langmuir-Freundlich equation was used. It was found that in the low range of the concentrations the adsorptive properties of the activated carbons are reduced in the following direction DTO>WD-ekstra>CWZ-22>AG>A>AG5. Reducing the adsorptive properties of the polymeric adsorbents states was carried out in the following order: XE-340> XE-572>XE-563>XE-348. The adsorbents XE-340, XE-572 and XE-563 have much more higher adsorptive properties than the applied activated carbons. Lower adsorptive properties of XE-348 are the result of its high surface polarity.
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 2; 34-36
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Epoxidation of 2-buten-1-ol over Ti-MCM-41 and Ti-MCM-48 titanium silicalite catalysts
Autorzy:: Wróblewska, A.
Ławro, E.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/777986.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: epoksydacja
2,3-epoksybutan-1-ol
Ti-MCM-41
Ti-MCM-48
epoxidation
2,3-epoxybutan-1-ol
Opis:: The results of the epoxidation of 2-buten-1-ol with 30 wt% hydrogen peroxide have been presented. As a solvent methanol was used. The process was carried out over the titanium silicalite catalysts: Ti-MCM-41 and Ti-MCM-48. The influence of temperature (20 - 120°C). the molar ratio of CRA/H2O2 (5:1 - 5:1), methanol concentration (5 - 90 wt%), catalyst concentration (0.1 - 5.0 wt%) and the reaction time (30 -300 min) was investigated. The obtained results were used for the determination of optimum conditions of running the epoxidation process of 2-buten-1-ol.
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 3; 1-4
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Mg(OTf)2 + ionic liquid – recyclable catalytic system in diels-alder reaction
Autorzy:: Bittner, B.
Milchert, E.
Janus, E.
Powiązania:: https://bibliotekanauki.pl/articles/779322.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: reakcja Dielsa-Aldera
ciecze jonowe
kwasy Lewisa
pochodne norbornenu
Diels-Alder reaction
ionic liquids
Lewis acids
norbornene derivatives
Opis:: A comparative study of Diels-Alder reaction between cyclopentadiene and dimethyl maleate in catalytic system is reported. The catalytic system was formed from ionic liquid which was made of N-hexylpyridinium bis(trifluoromethylsulfonyl)imide and magnesium trifluoromethanesulfonate. The yields, TONs, TOFs and endo:exo ratios were calculated. The optimal catalyst concentration was found in order to obtain the mixture of endo, exo isomers with the highest yields. Moreover recycling of the catalytic system consisting of Mg(OTf)2 (2 mol%) and ionic liquid was performed. The distillation was noticed to be a better product removal method than extraction by organic solvent, taking into consideration both the TON and TOF values.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 3; 3-5
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Changes in the composition of wastewater as a result of dehydrochlorination of 1,3-dichloropropan-2-ol under different process conditions
Autorzy:: Krzyżanowska, A.
Milchert, E.
Bartkowiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/778349.pdf
Data publikacji:: 2014
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: epichlorohydrin
dehydrochlorination
dichloropropanols
1,3-dichloropropan-2-ol
wastewater
Opis:: The results of dehydrochlorination of 1,3-dichloropropan-2-ol to epichlorohydrin are reported. The process ran in the reaction-stripping column system with a continuous removal of epichlorohydrin in a steam stream. The influence of 10 wt% alkali solution (NaOH, Ca(OH)₂) and the method of distillate collection on the 1,3-dichloropropan-2-ol conversion, selectivity of transformation to epichlorohydrin and by-products, and the composition of wastewater have been analysed.
Źródło:: Polish Journal of Chemical Technology; 2014, 16, 1; 92-96
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Synthesis and characteristics of titanium silicalite TS-1, Ti-Beta and Ti-MWW catalysts
Autorzy:: Wróblewska, A.
Fajdek, A.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/779396.pdf
Data publikacji:: 2009
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: TS-1
Ti-Beta
Ti-MWW
titanium-silicalite catalysts
Opis:: The synthesis methods of the following titanium-silicalite catalysts: TS-1, Ti-Beta and Ti-MWW were presented. The results of the analyses of the catalysts by XRD, SEM and IR, UV-vis methods were also shown. A brief description of the catalytic performances of these catalysts in the oxidation process of olefins, alkenes, alcohols and aromatic compounds was presented.
Źródło:: Polish Journal of Chemical Technology; 2009, 11, 1; 64-71
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Epoxidation of crotyl alcohol in the presence of titanium silicalite Ti-MWW catalyst – the new and friendly method of 2,3-epoxybutane-1-ol synthesis
Autorzy:: Wróblewska, A.
Fajdek, A.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/779457.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Ti-MWW
krotyl epoksydacji alkoholu
2,3-epoksybutan-1-ol
crotyl alcohol epoxidation
2,3-epoxybutane-1-ol
Opis:: Epoxidation of crotyl alcohol (CA) with 30 wt% hydrogen peroxide over Ti-MWW catalyst has been studied with methanol as a solvent and at autogenic pressure. The influence of temperature in the range of 20 – 120oC, the molar ratio of CA/H2O21:1-5:1, methanol concentration 5 – 90 wt%, Ti-MWW catalyst concentration 0.0 – 5.0 wt% and the reaction time 5 – 300 min have been studied. The main product of CA epoxidation is 2,3-epoxybutane-1-ol (2,3EB1O), a compound with many applications.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 2; 57-61
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Optimization of the epoxidation process of (1Z,5E,9E)-1,5,9-cyclododecatriene to 1,2-epoxy-(5Z,9E)-5,9-cyclododecadiene with tert-buthyl hydroperoxide — the influence of technological parameters on the hydroperoxide conversion
Autorzy:: Lewandowski, G.
Rytwińska, E.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/778202.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: epoksydowanie
wodoronadtlenek tert-butylu
(1Z,5E,9E)-1,5,9-cyklododekatrien
1,2-epoksy-(Z,E)-5,9-cyklododekadien
planowanie doświadczeń
optymalizacja
epoxidation
tert-butyl hydroperoxide
(1Z,5E,9E)-1,5,9-cyclododecatriene
1,2-epoxy-(5Z,9E)-5,9-cyclododecadiene
design of experiments
optimization
Opis:: The optimization studies of the epoxidation process of (1Z,5E,9E)-1,5,9-cyclododecatriene (CDT) with tert-buthyl hydroperoxide (TBHP) over the molybdenum catalyst Mo(CO)6 were performed. The reaction was examined in terms of a uniform-rotatable design. Three factors were analyzed: the reaction time, CDT:TBHP molar ratio, and the molar concentration of the catalyst (Mo(CO)6). According to the design 20 experiments were performed at the constant temperature of 70°C.
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 3; 105-107
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Topical and prospective processes of acetoxylation
Autorzy:: Lewandowski, G.
Bartkowiak, M.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/778851.pdf
Data publikacji:: 2009
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: acetoksylowanie
octan allilowy
nadtlenek wodoru
octan tert-butylu
acetoxylation
allyl acetate
hydrogen peroxide
propene glycol monoacetate
tert-butyl acetate
2-cyclohexenyl acetate
tetrahydrofuran
benzyl acetate
Opis:: The latest acetoxylation processes have been described in this work: oxidative acetoxylation of propene to allyl acetate, acetoxylation of propene to propene glycol and its acetates, acetoxylation of methyl tert-butyl ether and oxidative acetoxylation of cyclohexene by hydrogen peroxide. Acetoxylation of 1,3-butadiene, isobutene and toluene were presented together with a short description of the acetoxylation catalysts.
Źródło:: Polish Journal of Chemical Technology; 2009, 11, 4; 46-51
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Dehydrochlorination of 1,3-dichloropropan-2-ol by calcium and sodium hydroxide solutions
Autorzy:: Krzyżanowska, A
Milchert, E.
Bartkowiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/779937.pdf
Data publikacji:: 2014
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: epichlorohydrin
dehydrochlorination
dichloropropanols
1,3-dichloropropan-2-ol
Opis:: The results of dehydrochlorination of 88 wt% aqueous solution of 1,3-dichloropropan-2-ol to epichlorohydrin are reported. The process was carried out in the reaction-stripping column system with a continuous removal of epichlorohydrin in the steam stream. Aqueous solutions of sodium and calcium hydroxides at concentrations in the range of 3–14 wt% were used for the dehydrochlorination. The infl uence of the type and concentration of dehydrochlorination agent on 1,3-dichloropropan-2-ol conversion, the selectivity of transformation to epichlorohydrin and by-products, and the composition of distillate and wastewater were studied.
Źródło:: Polish Journal of Chemical Technology; 2014, 16, 3; 86-90
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Technological parameters of epoxidation of sesame oil with performic acid
Autorzy:: Musik, M.
Milchert, E.
Malarczyk-Matusiak, K.
Powiązania:: https://bibliotekanauki.pl/articles/778421.pdf
Data publikacji:: 2018
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: sesame oil
epoxidation
performic acid
hydrogen peroxide
Opis:: The course of epoxidation of sesame oil (SO) with performic acid formed „in situ” by the reaction of 30 wt% hydrogen peroxide and formic acid in the presence of sulfuric acid(VI) as a catalyst was studied. The most advantageous of the technological independent parameters of epoxidation are as follows: temperature 80°C, H₂O₂ C=C 3.5:1, HCOOH/C=C 0.8:1, amount of catalyst as H₂SO₄ /(H₂O₂ +HCOOH) 1 wt%, stirring speed at least 700 rpm, reaction time 6 h. The iodine number (IN), epoxy number (EN), a relative conversion to oxirane (RCO) and oxirane oxygen content (EOe) were determined every hour during the reaction. Under optimal conditions the sesame oil conversion amounted to 90.7%, the selectivity of transformation to epoxidized sesame oil was equal to 93.2%, EN = 0.34 mol/100 g, IN = 0.04 mol/100 g oil (10.2 g/100 g oil), a relative conversion to oxirane RCO = 84.6%, and oxirane oxygen content of EOe = 5.5%.
Źródło:: Polish Journal of Chemical Technology; 2018, 20, 3; 53-59
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Technological aspects of vegetable oils epoxidation in the presence of ion exchange resins: a review
Autorzy:: Milchert, E.
Malarczyk-Matusiak, K.
Musik, M
Powiązania:: https://bibliotekanauki.pl/articles/779147.pdf
Data publikacji:: 2016
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: acidic ion exchange resins
epoxidation
review
vegetable oils
Opis:: A review paper of the technology basics of vegetable oils epoxidation by means of peracetic or performic acid in the presence of acidic ion exchange resins has been presented. The influence of the following parameters: temperature, molar ratio of acetic acid and hydrogen peroxide to ethylenic unsaturation, catalyst loading, stirring intensity and the reaction time on a conversion of ethylenic unsaturation, the relative percentage conversion to oxirane and the iodine number was discussed. Optimal technological parameters, mechanism of epoxidation by carboxylic peracids and the possibilities of catalyst recycling have been also discussed. This review paper shows the application of epoxidized oils.
Źródło:: Polish Journal of Chemical Technology; 2016, 18, 3; 128-133
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Formation of environmentally friendly chloroorganic compounds technology by sewage and by-products utilization
Autorzy:: Myszkowski, J.
Milchert, E.
Paździoch, W.
Pełech, R.
Powiązania:: https://bibliotekanauki.pl/articles/778194.pdf
Data publikacji:: 2007
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: recykling
związki chloroorganiczne
chlorek winylu
tlenek propylenu
recycling
chloroorganic compounds
vinyl chloride
propylene oxide
Opis:: The processes presented in the study enables the separation and disposal of the chloroorganic compounds as by-products from the vinyl chloride plant by using the dichlorethane method and also from the production of propylene oxide by the chlorohydrine method. The integrated purification method of steam stripping and adsorption onto activated carbon allows a complete removal and recovery of the chloroorganic compounds from waste water. Waste distillation fraction is formed during the production of vinyl chloride. 1,1,2-trichloroethane separated from the above fraction, can be processed to vinylidene chloride and further to 1,1,1-trichloroethane. 2,3-Dichloropropene, 2-chloroallyl alcohol, 2-chloroallylamine, 2-chlorothioallyl alcohol or bis(2-chloroallylamine) can be obtained from 1,2,3-trichloropropane. In the propylene oxide plant the waste 1,2-dichloropropane is formed, which can be ammonolysed to 1,2-diaminopropane or used for the production of β-methyltaurine. Other chloroorganic compounds are subjected to chlorinolysis which results in the following compounds: perchloroethylene, tetrachloromethane, hexachloroethane, haxachlorobutadiene and hexachlorobenzene. The substitution of the milk of lime by the soda lye solution during the saponification of chlorohydrine eliminates the formation of the CaCl2 waste.
Źródło:: Polish Journal of Chemical Technology; 2007, 9, 3; 118-121
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Utilization of waste chloroorganic compounds
Autorzy:: Myszkowski, J.
Milchert, E.
Bartkowiak, M.
Pełech, R.
Powiązania:: https://bibliotekanauki.pl/articles/779232.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: adsorpcja
amonolizy
związki chloroorganiczne
izomeryzacja
chloroliza
adsorption
amonolysis
chloroorganic compounds
isomerization
chlorolysis
Opis:: Efficient methods of utilization of waste chloroorganic compounds coming from waste water and the waste streams formed e.g. in the production of vinyl chloride by dichloroethane method and in the production of propylene oxide by chlorohydrin method have been presented. First the separation of chloroorganic wastes by the adsorption methods has been described in the article. Three valuable methods of hlorocompounds utilization have been then discussed. The first one is isomerization of 1,1,2-trichloroethane to 1,1,1- trichloroethane as the valuable product with less toxicity than a substrate. The second method is ammonolysis of waste 1,2-dichloropropane and 1,2,3-trichloropropane. The third described method is chlorolysis. This method can be used for the utilization of all types of waste chloroorganics.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 3; 36-39
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: The Ti-MWW catalyst - its characteristic and catalytic properties in the epoxidation of allyl alcohol by hydrogen peroxide
Autorzy:: Wróblewska, A.
Fajdek, A.
Milchert, E.
Grzmil, B.
Powiązania:: https://bibliotekanauki.pl/articles/778365.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: Ti-MWW
katalizatory tytanowo-silikalitowe
glicydol
epoksydacja w fazie ciekłej
nadtlenek wodoru
titanium-silicalites
glycidol
liquid phase epoxidation
hydrogen peroxide
Opis:: Ti-MWW, one of the latest titanium-silicalite catalysts, has been prepared by direct hydrothermal synthesis using hexamethyleneimine as a structure-directing agent. The characteristic of the catalyst was performed by means of the following methods: XRD, SEM, IR, UV-vis and X'Ray microanalysis. The catalytic properties of Ti-MWW have been compared with those of the conventional titanium-silicalites TS-1 and TS-2 in the epoxidation of allyl alcohol with hydrogen peroxide. The process has been described by the following main functions: the selectivity of the transformation to glycidol in relation to allyl alcohol consumed, the conversions of the substrates (allyl alcohol and hydrogen peroxide) and the selectivity of the transformation to organic compounds in relation to hydrogen peroxide consumed.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 1; 29-34
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Isolation of 1,2-epoxybutane-3-ol and 2,3-epoxybutane-1-ol from post-reaction mixtures
Autorzy:: Wróblewska, A.
Wajzberg-Prokowska, J.
Ławro, E.
Milchert, E.
Powiązania:: https://bibliotekanauki.pl/articles/779569.pdf
Data publikacji:: 2010
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: cienka powłoka destylacyjna
izolacja epoksydowa
thin film distillation
isolation of epoxides
Opis:: Attempts were made to isolate 1,2-epoxybutane-3-ol and 2,3-epoxybutane-1-ol from post-reaction mixtures left after the epoxidation of 1-butene-3-ol and 2-butene-1-ol with hydrogen peroxide by thin film distillation. From the raw mixture containing about 8.3 wt% of the epoxide at the first stage the concentration of epoxide is increased to 32 wt%. At the second stage of distillation the epoxide fraction is concentrated to about 76 wt%. After the third stage of thin film distillation the epoxide fraction of 99.6% purity can be obtained. The concentration of this fraction by azeotropic distillation with n-propanol as an azeotropic agent permits obtaining epoxide of 99.6 wt% purity.
Źródło:: Polish Journal of Chemical Technology; 2010, 12, 2; 29-32
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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