نویسندگان
1 مرکز تحقیقات سیاست علمی کشور ،تهران
2 تهران، دانشگاه صنعتی امیرکبیر- دانشکده معدن و متالورژی
چکیده
هدف از ارائه این مقاله بررسی عوامل مختلفی چون غلظت استخراج کننده، دما و غلظت اصلاح کننده بر میزان جذب پروتون اسید سولفوریک توسط حلال آلی تری اکتیل آمین در بازیابی آنیون های فلزاتی از قبیل وانادیوم می باشد. برای این منظور با تغییر پارامترهای دما، غلظت اسید سولفوریک، غلظت حلال آلی TOA واصلاح کننده اکتانول، به بررسی درصد استخراج اسید پرداخته شده است. این بررسی ها نشان داده اند واکنش جذب پروتون توسط TOA گرمازا بوده، افزایش غلظت استخراج کننده باعث افزایش درصد استخراج می شود. از طرفی تغییرات غلظت اصلاح کننده بر استخراج بی اثر است و صرفا جدایش دو فاز را تسهیل می کند. واکنش استوکیومتریک جذب پروتون همراه با استخراج دو مول اسید و سه مول آب است.
کلیدواژه‌ها
عنوان مقاله [English]
Protonation of Trioctylamine(TOA) With Sulfuric Acid
نویسندگان [English]
- N. Bigdelou 1
- S. Mahmoudi 2
- E. Keshavarz Alamdari 2
- Z. Moshefi Shabestari 2
1 National Research Institute for Science Polic, Tehran, Iran
2 Department of mining and metallurgical engineering , university of Amirkabir, Tehran, Iran
چکیده [English]
Separation of sulfuric acid with TOA from acidic solution for many metals ion recovery through solvent extraction method has been investigated . The effect of concentration of TOA as an extractant and octanol as modifier has been studied. Also the effect of temperature and water adsorption has been studied. An organic phase containing TOA as extractant, octanol as modifier and Kerosene as diluent. Increase in the TOA concentration leads to an increase of the amount of acid extracted in the organic phase. Adsorption of sulfuric acid with TOA is an exothermic reaction.stoichiometric coefficients of sulfuric acid in this reaction has been determinated by slope analysis method. It has been shown that 3 moles of TOA extracts 2moles of sulfuric acid and 3 moles of water.
کلیدواژه‌ها [English]
- Solvent extraction
- TOA
- Octanol
- Sulfuric acid
- Protonation
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