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    Wyświetlanie 1-5 z 5
    Tytuł:
    The impact of reagents concentration on the efficiency of obtaining high-purity magnesium hydroxide
    Autorzy:
    Radomski, Piotr
    Jarosiński, Andrzej
    Wzorek, Zbigniew
    Nowak, Anna K.
    Powiązania:
    https://bibliotekanauki.pl/articles/778842.pdf
    Data publikacji:
    2020
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    magnesium hydroxide
    precipitation method
    inorganic flame retardants
    Opis:
    The work presents the impact of reagents concentration and the drying process on the efficiency of obtaining magnesium hydroxide and its specific surface area. Magnesium sulphate(VI) within the concentration range of 0.7–2.0 mol/dm3  was used in the research as magnesium feedstock and sodium hydroxide was used as a precipitating agent within the same concentration range. The process of obtaining magnesium hydroxide was carried out with a 25% excess of the precipitating agent in relation to the reaction stoichiometry. The obtained suspension was separated by way of multi-stage sedimentation with the use of acetone and freezing samples. Depending on the concentration of reagents the efficiency of obtaining magnesium hydroxide fell within the range of 88–99%, whereas the specific surface area – within 115–609 m2 /g, while the high purity of samples above 99% of magnesium hydroxide was maintained.
    Źródło:
    Polish Journal of Chemical Technology; 2020, 22, 2; 73-77
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological Evaluation of Variously Intercalated Pre-baked Clay
    Autorzy:
    Ullah, H.
    Imtiaz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778613.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    clay
    alkali metal intercalation
    inorganic modifier
    scanning electron microscopy
    Opis:
    The use of porous materials is enjoying tremendous popularity and attention of the advance scientific communities due to their excellent adsorptive and catalytic activities. Clays are one of the most important candidates in the porous community which shows the above mentioned activities after modifing with a different intercalating agent. The paper is focused on the infiuence of some inorganic intercalating agents (NaOH) on the morphology of the variously intercalated clay samples. The alkali metal was used as the inorganic intercalating agent. The effect of intercalation temperature, intercalation agent concentration and intercalation time on the pre-baked clay morphology were also part of the study. Scanning electron microscopy (SEM) study was performed to evaluate the morphological changes of the resultant intercalates. Different morphological properties were improved significantly in the case of the inorganically modified clay samples. Thus, such intercalations are suggested to be effective if the clays under study are to be used for different industrial process at elevated conditions.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 2; 5-11
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The oily wastewater treatment using the nanofiltration process
    Autorzy:
    Orecki, A.
    Tomaszewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778647.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    nanofiltracja
    odolejanie ścieków
    związki nieorganiczne
    nanofiltration
    oily wastewater
    inorganic compounds
    Opis:
    The objective of this work was to investigate the possibility of oily wastewater treatment using the nanofiltration (NF) process. The NF studies were carried out with a permeate obtained from ultrafiltration (UF) (used for the treatment of the oily wastewater from metal industry). The influence of transmembrane pressure on a permeate flux, the degree of the rejection of oil and inorganic compounds was investigated. The studies on the NF treatment of oily wastewater demonstrated a high effectiveness of the rejection of oil and inorganic compounds. The permeate obtained from the treatment was free of oil. Moreover, the retention coefficient of the inorganic compounds was higher than 75% for all the cations examined (Na+, K+, Mg2+, Ca2+, Zn2+, Cu2+) and higher than 95% for sulphates. Therefore, the permeate obtained in the NF process can be reused for fresh emulsion preparation.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 4; 40-42
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modified acrylamide copolymers as flocculants for model aqueous suspensions
    Autorzy:
    Drzycimska, A.
    Szmidt, B.
    Spychaj, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/779960.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    flokulanty anionowe
    flokulanty kationowe
    kopolimery akryloamidowe
    modyfikatory nieorganiczne
    anionic flocculants
    cationic flocculants
    acrylamide copolymers
    inorganic modifier
    Opis:
    Two groups of acrylamide copolymers have been obtained by inverse microemulsion polymerization using: (i) acrylamide (AAm) with [2-(acryloyloxy)ethyl]trimethylammonium chloride (AETAC) in the presence of sodium montmorillonite (MMT), and (ii) acrylamide with acrylic acid (AA) in the presence of aluminum sulphate. The received materials were characterised by capillary viscometry and the DSC methods, as well as the flocculation performances of the modified copolymers in the treatment of aqueous model suspensions of talc and calcium montmorillonite have been investigated. The effectiveness of the acrylamide flocculants was evaluated on the basis of the suspension extinction reduction and the sludge volume. The obtained results have been compared while using the modified materials and appropriate anionic and cationic AAm copolymers.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 10-14
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Degradability of organic-inorganic cellulose acetate butyrate hybrids in sea water
    Autorzy:
    Wojciechowska, P.
    Heimowska, A.
    Foltynowicz, Z.
    Rutkowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/779260.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    degradacja
    octanomaślan celulozy
    hybrydy organiczno-nieorganiczne
    woda morska
    degradation
    cellulose acetate butyrate
    organic-inorganic hybrids
    sea water
    Opis:
    Environmental degradability of novel organic-inorganic cellulose acetate butyrate hybrids obtained via solgel process was investigated. The degradation of hybrids was studied under marine exposure conditions in the Baltic Sea for a period of 25 weeks. The influence of characteristic parameters of sea water on the degree of degradation monitored by changes of weight and optical microscopy was discussed. The degraded samples were also examined by FT-IR spectroscopy. It has been established that the CAB/silica hybrids are more susceptible to biodegradation in sea water environment than pure cellulose acetate butyrate.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 2; 29-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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