Zus a m m e n f a s sung. Ausgehend von 3 a-Acetoxy-l1,12 ,%oxide-cholansaure-methylester (XXV) wurde die noch unbekannte 3 a, 12 a-Dioxy-11-keto-cholansiiure (XXXIII) und der 3a, l2a-Diacetoxy-1 l-keto-cholansauremethylester (XXXV) in Kristallen bereitet. Bur Uberprufung und Erganzung der spez. Dre
Sur la séparation des terres rares à l'aide de l'acide éthylènediamine-tétraacétique. III. Séparation par cristallisation des sels complexes NH4[RY]
✍ Scribed by G. Brunisholz
- Publisher
- John Wiley and Sons
- Year
- 1955
- Tongue
- German
- Weight
- 286 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
Seven hydrates of the ammonium lanthanon ethylenediamine‐tetraacetate complexes have been identified. The well crystallized octahydrates are isomorphous with the previously described sodium salts. Most of the other compounds form very thin needles and have a marked tendency to give supersaturated solutions. Owing to their different structure, the various species form only partly miscible mixed crystals. This fact greatly improves the separation of some of the lanthanons. A cyclic process is outlined by which a mixture of the cerit earths can be separated into two fractions, one containing more than 80% and the other only 25% La~2~O~3~.
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Sur la separation des terres rares A l'aide de l'acide bthylbnediamine-tktraacktique. VII. Proc6d6 en cycle pour le fractionnement des terres cbriques par G. Brunisholz et R. Cahen. (24 158) RCcemment nous avons dCcrit l'isotherme de solubilit6 de 0" du systkme NH,[La-Cdta] -NH,[Sm-Cdta] -H,O (Cdta