Author:Vildan Çakın ÖNEM, M.Kemal GÖKAY
Publishing Date: 2006
Volume 21 Issue 1_2
The uses of clay and its derivatives as raw material increase rapidly. The sunflower oil bleaching properties of sepiolite mineral were investigated in this study since sepiolite gains importance in terms of its industrial utilization in time due to its distinctive physical and chemical characteristics. Experimental studies were re-performed under the same conditions that carried out for industrially used Tonsile optimum 210 FF and the obtained results were compared with each other . Two different bleaching temperatures (90 and 100oC), four different bleaching times (15, 30, 45 and 60 min.) and seven different oil/clay rations (0.5, 0.65, 0.8, 0.95, 1.1, 1.25 and 1.4 %) have been used as variable parameters in the experimental study. At the end of the tests, the color of oil and FFA (Free fatty acid) % values as quality parameter fort he bleached oil have been examined. Experimantal studies showed that raw sepiolite and Tonsile provide close belaching values, however the adsorbtion rate for sepiolite was slower. In addition, it was determined that FFA values obtained with sepiolite decreased with increasing bleaching time and earth ratio. However, these values for Tonsile started to increase after a particular bleaching time and earth ratio.
Key Words: Sepiolite; Sunflower oil; Bleaching.