16 Result(s)
within
Agnieszka Wróblewska
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Article
Biomass-based activated carbons produced by chemical activation with H3PO4 as catalysts for the transformation of α-pinene to high-added chemicals
In the era of ecology and careful care for the environment, it becomes important to use renewable raw materials of plant origin, which are often more easily available and cheaper. One of the important and rapi...
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Open AccessClinoptilolite as a natural, active zeolite catalyst for the chemical transformations of geraniol
This work presented the studies with the natural zeolite—clinoptilolite as the catalyst for the isomerization of geraniol. During the research, it turned out that the studied process is much more complicated, ...
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Open AccessPolysaccharide films modified by compounds of natural origin and silver having potential medical applications
In the first stage, seven polysaccharide films were prepared with varying compositions of starch, carboxymethyl starch (CMS), and carboxymethyl cellulose (CMC), together with glycerol and citric acid. From the...
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Article
Open AccessEpoxidation of 1,5,9-cyclododecatriene with hydrogen peroxide under phase-transfer catalysis conditions: influence of selected parameters on the course of epoxidation
This work presents the studies on the epoxidation of 1,5,9-cyclododecatriene (CDT) with hydrogen peroxide as the oxidizing agent, under conditions of the phase transfer catalysis (PTC), and with the following ...
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Open AccessThe isomerization of S-carvone over the natural clinoptilolite as the catalyst: the influence of reaction time, temperature and catalyst content
This work describes the isomerization of S-carvone using a natural zeolite—clinoptilolite as the catalyst. The isomerization of S-carvone was carried out at the catalyst content in the reaction mixture from 5 ...
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Article
Open AccessCarbonaceous catalysts from orange pulp for limonene oxidation
The possibility of orange pulp utilization for nanoporous carbons production was investigated. Moreover, processing the obtained materials as limonene oxidation catalysts was studied as well. Limonene was sepa...
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Open AccessInfluence of Technological Parameters on the Isomerization of Geraniol Using Sepiolite
In the current study, the isomerization of geraniol over a natural sepiolite as a catalyst was investigated and optimized. Prior to application in the isomerization process, the physical and chemical propertie...
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Article
Open AccessOxidation of limonene over molybdenum dioxide-containing nanoporous carbon catalysts as a simple effective method for the utilization of waste orange peels
A new method of the oxidation of natural limonene, obtained from waste orange peels, using relatively inexpensive MoO2-containing activated carbon catalysts is presented. The contents of molybdenum in the catalys...
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Article
Open AccessLimonene oxidation over Ti-MCM-41 and Ti-MWW catalysts with t-butyl hydroperoxide as the oxidant
This paper presents the method of limonene epoxidation over Ti-MCM-41 and Ti-MWW catalysts in the presence of t-butyl hydroperoxide as an oxidant. Natural limonene used in the epoxidation process was obtained ...
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Article
Open AccessFe/Nanoporous Carbon Catalysts Obtained from Molasses for the Limonene Oxidation Process
Iron/nanoporous carbon catalysts (Fe/NPC) were used in the studies on limonene oxidation employing methanol as a solvent and aqueous hydrogen peroxide as an oxidizing agent. The nanoporous carbon support of th...
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Article
The isomerization of α-pinene over the Ti-SBA-15 catalyst—the influence of catalyst content and temperature
The Ti-SBA-15 catalyst, which was prepared according to the literature by the hydrothermal method, was used in the isomerization of α-pinene to: camphene and limonene. In this work, the influence of: Ti-SBA-15...
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Article
Open AccessAcetonitrile and water as solvents for the epoxidation of allylic compounds over the Ti-SBA-15 catalyst
Research studies on the epoxidation of allyl alcohol, methallyl alcohol, crotyl alcohol and 1-butene-3-ol over the titanosilicate catalysts—Ti-SBA-15 have been conducted. The studies were carried out in an ace...
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Article
Open AccessWater as the solvent for the process of phenol hydroxylation over the Ti-MWW catalyst
This work presents the studies on the process of phenol hydroxylation over the Ti-MWW catalyst. The medium of the reaction was water, whose amount was a sum of water introduced into the reactor with the 30 wt%...
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Article
Open AccessThe utilization of Ti-SBA-15 catalyst in the epoxidation of allylic alcohols
Ti-SBA-15, one of the latest titanium silicalite catalysts, has been prepared according to the literature by the direct hydrothermal synthesis using Pluronic 123 as structure-directing agent. The characterizat...
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Article
Open AccessSelective liquid-phase oxidation of allyl alcohol to glycidol over MWW type titanosilicalite
The results of the epoxidation of allyl alcohol with 30% hydrogen peroxide over the Ti-MWW catalyst have been presented. The studies were carried out under atmospheric pressure and in the presence of methanol ...
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Article
Influence of process parameters on the epoxidation of 2-buten-1-ol over titanium silicalite TS-1 catalyst
The influence of process parameters on the epoxidation of 2-buten-1-ol with 30 % hydrogen peroxide using the titanium silicalite TS-1 is presented. The studies were carried out under autogenic pressure (in aut...
