بررسی اثر اتانول و اسید آسکوربیک بر استخراج دی اکسید تیتانیم از ایلمنیت توسط اسید اگزالیک

نویسندگان

دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران

چکیده

در مطالعه حاضر، از تشویه قلیایی و لیچینگ به‌وسیله اسید اگزالیک به‌منظور استخراج دی اکسید  تیتانیم از ایلمنیت استفاده شده و اثر اتانول و اسید آسکوربیک بر مقدار خلوص و بازیابی دی اکسید  تیتانیم بررسی شده  است. روند انجام مراحل شامل تشویه قلیایی ایلمنیت توسط نمک کربنات سدیم به مدت چهار ساعت در دمای 900 درجه سانتیگراد، لیچینگ ایلمنیت تشویه شده توسط آب مقطر به مدت یک ساعت در دمای اتاق و لیچینگ توسط مخلوطی از اسید اگزالیک 47/0 مولار و مقادیر متفاوتی از اسید آسکوربیک و اتانول در دمای 65 درجه سانتی‌گراد بوده  است. نتایج نهایی نشان داد که استفاده از اتانول باعث افزایش میزان بازیابی و به‌کار بردن اسید آسکوربیک سبب افزایش میزان خلوص دی اکسید  تیتانیم استخراج شده می‌شود و حضور توأم این دو عامل سبب افزایش هم‌زمان میزان خلوص و بازیابی محصول نهایی می شود. درنهایت پس از انتخاب اسید اگزالیک 47/0 مولار، اسید آسکوربیک 005/0 مولار و اتانول 48 درصد به‌عنوان شرایط مناسب برای محیط لیچینگ، با افزایش زمان و دمای لیچینگ به 16 ساعت و 80 درجه سانتی‌گراد، امکان رسیدن به دی اکسید  تیتانیم با خلوص 3/93 درصد و 9/90 درصد میسر شد

کلیدواژه‌ها

عنوان مقاله [English]

Investigating the Effect of Ethanol and Ascorbic Acid on Titanium Dioxide Extraction from Ilmenite by Oxalic Acid

نویسندگان [English]

  • V. Mohammadpour
  • M. Soltanieh
  • M. Adeli
School of Metallurgy & Materials Engineering, Iran University of Science and Technology.
چکیده [English]

In the present study, alkali roasting and oxalic acid leaching were used to extract titanium dioxide from ilmenite, and the effect of ethanol and ascorbic acid on the purity and recovery of titanium dioxide was investigated. In this research, ilmenite was alkali roasted with sodium carbonate for 4 hours at 900˚C. Then, the roasted ilmenite was leached with distilled water for 1 hour at room temperature. Finally, leaching with a mixture of 0.47M oxalic acid and different amounts of ascorbic acid and ethanol was performed at 65˚C. The results showed that using ethanol caused an increase in the amount of recovery and ascorbic acid increased the purity of the extracted titanium dioxide; also, the presence of these two factors at the same time simultaneously increased the amount of purity and recovery of the final product. Eventually, by choosing 0.47M oxalic acid, 0.005M ascorbic acid, and 48% ethanol as the appropriate conditions for leaching media and increasing the leaching time and temperature to 16 hours and 80˚C, it was possible to get titanium dioxide purities which were as high as 93.3% and 90.9%, respectively.

کلیدواژه‌ها [English]

  • titanium dioxide
  • Ilmenite
  • Alkali Roasting
  • Oxalic Acid
  • Ascorbic Acid
  • Ethanol

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مواد پیشرفته در مهندسی
دوره 37، شماره 1
خرداد 1397
صفحه 11-25

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