Investigation of the influence of MgO and CaO content on the quality of technical ceramics

In this paper, the influence of MgO and CaO content on the quality of technical ceramics (which originally represents the  Al2O3 - SiO2 - CaO - MgO system) has been investigated. Therefore, quality tests were performed on samples where the contents of CaO and MgO were taken as variable values. Based on the obtained test results and their analysis, certain characteristics of ceramics are defined with the different percentages of individual oxides content in 98.2 - 99% Al2O3

Possibility of bleaching sunflower oil with synthetic zeolite

In this paper, the possibilities and effects of using domestic industrially produced zeolite for bleaching crude sunflower oil, compared to imported commercial bleaching earth, were examined. The parameters of the bleaching process in laboratory conditions were: temperature 95°C, contact time 30 min, and mass fractions of bleaching agent in oil: 0.2, 1, 2 and 3%. The following methods were used to characterize the bleaching agents: XRD, FTIR, BET and SEM/EDS. The bleaching efficiency parameters were determined by laboratory methods prescribed by the relevant ordinance on edible vegetable oils, and included: soap content, peroxide value and fatty acid composition. The results of the research showed that the effects of bleaching sunflower oil with synthetic zeolite are similar to the effects of bleaching with imported commercial bleaching earth, with the former showing a slightly higher effectiveness in reducing the peroxide value