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1
Content available Technological parameters of epoxidation of sesame oil with performic acid
Musik M., Milchert E., Malarczyk-Matusiak K.
Polish Journal of Chemical Technology
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2018
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Vol. 20, nr 3
53--59
EN
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%.
2
Content available Technological aspects of vegetable oils epoxidation in the presence of ion exchange resins: a review
Milchert E., Malarczyk-Matusiak K., Musik M
Polish Journal of Chemical Technology
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2016
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Vol. 18, nr 3
128--133
EN
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.
3
Content available remote Investigation of fluid dynamics in an unbaffled stirred vessel with an eccentrically located Rushton turbine
Musik M., Talaga J.
Czasopismo Techniczne. Mechanika
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2016
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Y. 113, iss. 2-M
191--198
EN
The paper presents the results of experimental investigation of the hydrodynamics in unbaffled stirred vessel with eccentric Rushton turbine configuration. Basing on flow visualisation. the main flow features were determined. Laser Doppler Anemometry measurements provided radial and axial components of the mean flow velocity vectors. The obtained data of power consumption allowed to determine the impact of the impeller eccentricity ratio e/R on the power number Ne.
PL
W artykule przedstawiono wyniki badań doświadczalnych hydrodynamiki mieszania w zbiorniku bez przegród z niecentrycznie usytuowanym mieszadłem turbinowym tarczowym. Dokonano wizualizacji przepływu. W oparciu o wyniki pomiarów z wykorzystaniem anemometru laserowego wyznaczono rozkłady promieniowej i osiowej składowej średniej prędkości przepływu cieczy. Określono doświadczalnie wpływ niecentryczności e/R usytuowania mieszadła na liczbę mocy mieszania Ne.
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