Abstract

• The chromite ores from Thabaitgine (Mandalay Region) and West Mindon (Magway Region) were analyzed and characterized by using conventional and modern instrumental analytical techniques. It was found that the chromite ore from Thabaitgine showed higher chromium content (Cr 63. 13 % of Cr2O3) as compared to West Mindon (Cr 41.33 % of Cr2 O3) chromite ore. Sodium dichromate was so prepared from Thabitgine chromite ore by leaching and pyrolysis method. The extracted compound was characterized by conventional and modern instrumental analytical techniques. The effects of raising temperature and duration of fusion time were studied to achieve maximum yield and purity. The optimal conditions, viz. the temperature at 900 ºC and leaching time of 7h, resulted in the yield of 89.30 % and purity % of 95.47.