Global Patent Index - EP 3652355 A1

EP 3652355 A1 20200520 - METHOD FOR OBTAINING CAESIUM FROM AQUEOUS STARTING SOLUTIONS

Title (en)

METHOD FOR OBTAINING CAESIUM FROM AQUEOUS STARTING SOLUTIONS

Title (de)

VERFAHREN ZUR CÄSIUM-GEWINNUNG AUS WÄSSRIGEN AUSGANGSLÖSUNGEN

Title (fr)

PROCÉDÉ POUR LA PRODUCTION DE CÉSIUM À PARTIR DE SOLUTIONS DE DÉPART AQUEUSES

Publication

EP 3652355 A1 20200520 (DE)

Application

EP 18753059 A 20180709

Priority

  • DE 102017211796 A 20170711
  • EP 2018068575 W 20180709

Abstract (en)

[origin: WO2019011876A1] The invention relates to a method for obtaining caesium from aqueous starting solutions having caesium contents in the range of 50 ppm to 5000 ppm, in which method the caesium ions in the aqueous solution are, in a first step, precipitated as a double salt having divalent cations with the aid of an at least 1.1-times overstoichiometric amount of solutions containing prussiate of potash, in a pH range of 2 to 12 and a temperature range of 10 to 80°C, the divalent cations either already being present in the starting solutions in an amount at least equimolar to the caesium content or being added as a water-soluble salt, and, in a second step, converted back into a water-soluble form by thermal decomposition and, in a third step, separated from the insoluble residues.

IPC 8 full level

C22B 26/10 (2006.01); C22B 3/22 (2006.01)

CPC (source: EP KR US)

C22B 3/22 (2013.01 - EP KR US); C22B 26/10 (2013.01 - EP KR US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

WO 2019011876 A1 20190117; AU 2018299849 A1 20200206; BR 112020000290 A2 20200714; CA 3068780 A1 20190117; CN 110869524 A 20200306; CN 110869524 B 20220705; EP 3652355 A1 20200520; KR 20200029438 A 20200318; US 11155895 B2 20211026; US 2020208239 A1 20200702

DOCDB simple family (application)

EP 2018068575 W 20180709; AU 2018299849 A 20180709; BR 112020000290 A 20180709; CA 3068780 A 20180709; CN 201880046430 A 20180709; EP 18753059 A 20180709; KR 20207000447 A 20180709; US 201816629361 A 20180709