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公开(公告)号：EP1807353A2
公开(公告)日：2007-07-18
申请号：EP05809106.7
申请日：2005-10-07
发明人： DELONS, Laurence , LAGARDE, Stéphane , PORIEL, Ludovic , LEMAIRE, Marc , FAVRE-REGUILLON, Alain , PELLET-ROSTAING, Stéphane
IPC分类号： C01G27/04
CPC分类号： C01G27/003 , B01J41/04 , C01G25/003 , C01G25/04 , C01G27/04
摘要： The invention concerns a method from separating zirconium and hafnium for a mixture of ZrCI4 and HfCI4 containing 3 wt. % or less of Hf based on Zr + Hf, the method including the following steps: 1) hydrolyzing a mixture of ZrCI4 and HfCI4 in an aqueous solution of strong inorganic acid, so as to form an aqueous solution having 7 to 12 moles of acid per liter; 2) passing the solution obtained at step 1) in an anion exchanging resin; 3) optionally eluting a fraction of said aqueous solution having 7 to 12 moles of acid per liter, enriched in hafnium; 4) removing the resin of the acid solution containing Zr and Hf; 5) passing in the resin an aqueous solution to detach the zirconium compounds fixed to the resin, and recovering a zirconium-enriched fraction.
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公开(公告)号：EP1773720A2
公开(公告)日：2007-04-18
申请号：EP05788725.9
申请日：2005-07-07
发明人： DELONS, Laurence , LAGARDE, Stéphane , FAVRE-REGUILLON, Alain , PELLET-ROSTAING, Stéphane , LEMAIRE, Marc , PORIEL, Ludovic
CPC分类号： C01G25/04 , C01G25/003 , C01G27/003 , C01G27/04
摘要： The invention concerns a method for separating hafnium and zirconium from a mixture containing ZrCl4 and HfCl4, the method comprising the following steps: 1) introducing the ZrCl4 and HfCl4 mixture in vapour form into a continuous extractive distillation column; 2) selectively absorbing ZrCl4 and HfCl4 vapours with an extraction solvent circulating counter-current relative to said vapours in the distillation column; 3) drawing a liquid or gaseous ZrCl4 and HfCl4 mixture enriched in ZrCl4; 4) drawing a liquid or gaseous ZrCl4 and HfCl4 mixture enriched in HfCl4; 5) hydrolyzing the mixture obtained at step 4) in an inorganic acid aqueous solution, so as to form an aqueous solution having 7 to 12 acid moles per liter; 6) passing the solution obtained at step 5) through an anion exchanging resin; 7) eluting and recovering a hafnium-enriched fraction.
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公开(公告)号：EP1807353B1
公开(公告)日：2010-08-18
申请号：EP05809106.7
申请日：2005-10-07
发明人： DELONS, Laurence , LAGARDE, Stéphane , PORIEL, Ludovic , LEMAIRE, Marc , FAVRE-REGUILLON, Alain , PELLET-ROSTAING, Stéphane
IPC分类号： C01G27/04
CPC分类号： C01G27/003 , B01J41/04 , C01G25/003 , C01G25/04 , C01G27/04
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