Editing Nuclear reprocessing (section)

===== Hexone or REDOX =====
This is a liquid-liquid extraction process which uses [[methyl isobutyl ketone]] codenamed hexone as the extractant. The extraction is by a ''solvation'' mechanism. This process has the disadvantage of requiring the use of a [[salting-out]] reagent ([[aluminium nitrate]]) to increase the nitrate concentration in the aqueous phase to obtain a reasonable distribution ratio (D value). Also, hexone is degraded by concentrated nitric acid. This process was used in 1952-1956 on the [[Hanford Site#Separation facilities|Hanford S plant (REDOX plant)]] and has been replaced by the PUREX process.<ref>{{Cite patent|country=US|number=2950166|pubdate=1960-08-23|title=Method for separation of plutonium from uranium and fission products by solvent extraction|assign1=[[United States Atomic Energy Commission]]|inventor1-last=Seaborg|inventor1-first=Glenn T.|inventorlink1=Glenn_T._Seaborg|inventor2-last=Blaedel, Jr.|inventor2-first=Walter J.|inventor3-last=Walling|inventor3-first=Matthew T.}}</ref><ref>{{cite web |url=http://www.llnl.gov/tid/lof/documents/pdf/235702.pdf |title=From separations to reconstitution—a short history of plutonium in the U.S. and Russia (UCRL-JC-133802) |author=L.W. Gray |date=15 April 1999 |publisher=Lawrence Livermore National Laboratory preprint |access-date=7 January 2006 |archive-date=29 November 2007 |archive-url=https://web.archive.org/web/20071129121200/http://www.llnl.gov/tid/lof/documents/pdf/235702.pdf |url-status=live }}</ref>

{{chem2|Pu(4+) + 4NO3(−) + 2S → [Pu(NO3)4S2]}}