3510

3316

كارشناسي ارشد

مهندسي شيمي

اصفهان:دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي

1385

[پانزده] ، 132 ،[II] ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

محمد چالكش اميري، اصغر صديق زاده

13/3/86

محمد قريشي، بيژن نجفي

1396/02/30

كتابنامه

مهندسي شيمي

مهندسي شيمي

ID3316

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractZirconium and hafnium co exist in nature but they have opposite nuclearcharacteristics Thus they have to be separated prior to their transformationinto pure metals Solvent extraction is a commercial method for production of pure materialssuch as zirconium and hafnium and their compounds from multi componentscrubber solution Many organic extractants have the ability to selectivelyextract the ions dissolved in a dilute acid solution Determination ofdistribution factors of the ions present in the solution is therefore animportant parameter in selection of the appropriate extractant In the extraction of zirconium and hafnium salts from HNO3 HCl HClO4 andH2SO4 into Neutral rganophosphorus compounds NOPC such as TBP incase using mixtures of inorganic acids NOPC extracts zirconium andhafnium with separation factor considerably exceeding the correspondingvalue for extraction from solution of individual acids a still higher separationis obtained when using mixture of acids especially those of nitric hydrochloric acids In this work the modified conditions of zirconiumextraction from solution containing nitric hydrochloric acids using TBP intreated kerosene as diluent has been investigated The following parametershave been studied mixing time the extractant nitric hydrochloric acids andzirconium concentrations acidification of organic phase the organic aqueousphase ratio and temperature and nitric acid extraction by TBP

محمد چالكش اميري، اصغر صديق زاده

محمد قريشي، بيژن نجفي