Extraktion des Caesiums aus wässrigen Lösungen durch Nitrobenzol-Lösung von Dipikrylamin

Salt waste volume reduction by sodium removal

“…These m a t e r i a l s a r e l a r g e l y water and t h e i r volume (and p a r t i c u l a r l y weight) a r e reduced c o n s i d e r a b l y by d r y i n g . The combined waste i n s o l u b l e s and aluminum hydroxide f i l t e r cake a f t e r d r y i n g a t 14,0°C ,and c r u s h i n g have a volume about 50% t h a t of t h e o r i g i n a l d r i e d . s a l t cake o r 2-112 t i m e s t h a t , ' proposed by H i l l .…”

Crystal structure of the high-energy-density material guanylurea dipicrylamide

“…A related study carried out with a mixture of K + , Rb + , and Cs + ions revealed that the Cs + ion shows maximum selectivity towards DPA À (Bray et al, 1962). In fact, it has been reported that DPA À can be used for the recovery of Cs + from radioactive wastes (Kyrš et al, 1960). Only in recent years has the structural chemistry of alkali metal and alkaline earth metal as well as ammonium and azolium dipicrylamides been investigated in detail.…”

Extraction

“…The anion of dipicrylamine forms extractable complexes with quaternary ammonium ions from basic solution into chloroform or dichloromethane (445,446). Cesium may be extracted from alkaline solutions as the dipicrylamine salt into nitrobenzene (269).…”