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In this study oils used direct influence sodium metallic on oxidation products and refining with the Mesoporous silicate material (MCM-41) and also silicate absorbents was synthesized and functionalized with aluminum salt through wet impreghation method (18wt%Al-MCM-41) (36wt% Al-MCM-41). Physical and structural properties has been investigated by FT-IR, BET,XRD and FESEM methods which shows a succful synthesis of the nano porous material. First step for reducing acid number oil we used direct reaction beetwen sodium metalic and used oil, after this step refining used oil by MCM-41 abosrbent has done. The effect of some parameters such as contact time, temperature and the dosage  has been determined and optimized by respons surface method (RSM). The results show that acid number decrease obtained 150 ,60min and 200% of dosage. Optimum condation for absorbent reaction products and new oxidation products by MCM-41 obtained contact time of 120min temperature (120oC) and dosage 200% .

Combination of reduction with metallic sodium and adsorption with mesoporous materials for re-refining of used insulating oil via experimental design