摘要:

The performance of hollow-fiber supported liquid membranes (HFSLM) for Co/Ni separation, utilizing a dialkylphosphinic acid as Co('II) selective carrier, has been studied. The primary objective of the study was to obtain practical information concerning the life-time of HFSLMs and how to extend it by fiber re-impregnation techniques. Results demonstrating the feasibility of concentration/separatlon processes are.alao reported.

ISSN:0736-6299    

DOI:10.1080/07366298608917859

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Stability constants of the 1,4-dimethylimidazole complexes of Co(II),Ni{II),Cu(II),Zn(II), and Cd(II) have been determined in aqueous solution and their structure has been elucidated. Conformational equilibria of the type octahedron-tetrahedron have been found in the case of the Co(II) and Sn(II) complexes. The extraction of all complexes has been shown to be dependent on their'molar contributions, d⊂n⊂ expressed in per cent. The distribution constants have determined for each complex and the composition of the species extracted with organic solvent has been suggested.The measurements were run at 298 K, at the ionic strength of the aqueous phase of 0.5 maintained by means of KNO⊂3⊂.

ISSN:0736-6299    

DOI:10.1080/07366298608917860

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

ISSN:0736-6299    

DOI:10.1080/07366298608917861

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor