EP3652355A1 - Verfahren zur cäsium-gewinnung aus wässrigen ausgangslösungen - Google Patents
Verfahren zur cäsium-gewinnung aus wässrigen ausgangslösungenInfo
- Publication number
- EP3652355A1 EP3652355A1 EP18753059.7A EP18753059A EP3652355A1 EP 3652355 A1 EP3652355 A1 EP 3652355A1 EP 18753059 A EP18753059 A EP 18753059A EP 3652355 A1 EP3652355 A1 EP 3652355A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- salt
- amount
- range
- cesium
- ppm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
Definitions
- the invention relates to a process for cesium recovery from aqueous
- the object of the invention has been found to provide a process for the economic recovery of cesium, which can continue to ensure compliance with environmental wastewater limits by Cs removal for the discharge of waste water into water and largely tolerated many interfering ions and impurities.
- the object is achieved by a process for cesium recovery from aqueous starting solutions with cesium ion contents in the range of 50 ppm to 5000 ppm, wherein the cesium ions contained in the aqueous solution with the aid of an at least 1, 1-fold überstöichiometrischen amount of blood lye salt selected from the group consisting of K 4 [Fe (CN) 6 ], Na 4 [Fe (CN) 6 ], Ca 2 [Fe (CN) 6 ] or mixtures thereof solutions in a first stage in the pH range of 2 to 12 are precipitated as a double salt with divalent cations in the temperature range of 10 to 80 ° C, wherein the divalent cations either in the starting solutions in a for
- water-soluble salt are added at least until reaching the equimolar amount and in a second stage by thermal decomposition back into a
- the invention features the use of typical "impurities" in aqueous solutions, such as magnesium and calcium, to remove the cesium present by adding yellow blood lye salt as a mixture of various sparingly soluble double salts of the exemplary composition
- Particularly preferred is a method in which a superstoichiometric amount of blood lye salt-containing solutions in the range of 1, 15 to 1, 5 times amount is used, which shifts the precipitation equilibrium far on the product side.
- the precipitation of the double salt is carried out in a first stage in the pH range of 4 to 1 1.
- the process can be advantageously designed by the precipitation of the double salt is carried out with the addition of inorganic filter aids such as diatomaceous earth or diatomaceous earth.
- a very particularly advantageous variant of the method consists in precipitating the superstoichiometric amount of alkali-blood lye salt remaining in the starting solution by adding a water-soluble iron (III) salt in the pH range from 4 to 7 to the already formed double salt.
- the excess of blood lye salt used is precipitated by addition of iron (III) salts and separated.
- the existing Cs 2 Mg [Fe (CN) 6 ] crystals act as "seed crystals" for the blue of Berlin, which is easier to remove by filtration, and surprisingly the Berlin blue binds further cesium from the solution by adsorption, so that the residual solubility of Cs in the solution of 20 ppm (only by precipitation of Cs 2 Mg [Fe (CN) 6 ] and Cs 2 Ca [Fe (CN) 6 ]) can be reduced to about 10 ppm
- This step not only removes the necessary excess of yellow blood lye salt from the solution, but also achieves further and improved Cs depletion, which increases the Cs yield with optimal utilization of the precipitating reagent used and thus makes it possible to economically produce water To use sources with low cesium levels.
- the process can be further improved by using iron (III) sulfate in excess of the amount of blood-lye salt remaining in the starting solution of up to 100% by weight.
- the process is particularly advantageous because the thermal digestion in the second stage is carried out in a calcining step under oxidative conditions at temperatures of 400 ° C. to 800 ° C.
- the cesium salts contained in the solution are further purified by recrystallization.
- the precipitation is preferably carried out in a reaction vessel without intermediate filtration at room temperature.
- the reaction is fast with about 1 hour reaction time and tolerant to other impurities.
- the filter residue consists of a mixture of various sparingly soluble Cs salts, which contain about 40 to 50 wt .-% of cesium based on the weight after separation of the mother liquor.
- the wet precipitated salt mixture is converted in a calcining step in air at 600 ° C into insoluble oxides and soluble Cs compounds.
- cesium constituents and Na / K all other elements form water insoluble hydroxides, oxides or
- the calcination residue is leached with water and a Cs salt solution is obtained, from which the insoluble constituents are filtered off. By washing or resuspending the residue in water, the Cs yield can be increased to about 90%.
- the present invention has the following advantages:
- Na 4 [Fe (CN) 6 ] x 10 H 2 O is added at room temperature as an aqueous solution or as a solid and stirred for 30 minutes. The precipitation occurs spontaneously. Subsequently, Fe 2 (SO 4 ) 3 is added as an aqueous solution or as a solid and stirred for 30 minutes. The further precipitation is spontaneous. It is then filtered through a paper fold filter and the residue is unwashed dried at 100 ° C.
- Residue of leaching oxides / hydroxides / carbonates of Fe, Ca, Mg, Sr and K.
- the residue of the thermal decomposition is leached with at least the necessary amount for the complete solution of deionized water and filtered off from insoluble constituents.
- the aqueous solution contains 1.4 g of Cs (100% of theory).
- composition of the solution 3.8% by weight CsCl / 1, 7% by weight CsOH / 2.3% by weight NaCl / ⁇ 0.1% by weight KCl
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Removal Of Specific Substances (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017211796 | 2017-07-11 | ||
PCT/EP2018/068575 WO2019011876A1 (de) | 2017-07-11 | 2018-07-09 | Verfahren zur cäsium-gewinnung aus wässrigen ausgangslösungen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3652355A1 true EP3652355A1 (de) | 2020-05-20 |
Family
ID=63168358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18753059.7A Withdrawn EP3652355A1 (de) | 2017-07-11 | 2018-07-09 | Verfahren zur cäsium-gewinnung aus wässrigen ausgangslösungen |
Country Status (8)
Country | Link |
---|---|
US (1) | US11155895B2 (ko) |
EP (1) | EP3652355A1 (ko) |
KR (1) | KR20200029438A (ko) |
CN (1) | CN110869524B (ko) |
AU (1) | AU2018299849A1 (ko) |
BR (1) | BR112020000290A2 (ko) |
CA (1) | CA3068780A1 (ko) |
WO (1) | WO2019011876A1 (ko) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR9604937A (pt) * | 1995-04-06 | 2000-10-24 | Cabot Corposation | Método de produção de compostos de césio |
FI111765B (fi) * | 1996-06-26 | 2003-09-15 | Fortum Nuclear Services Oy | Menetelmä cesiumin erottamiseksi ydinjäteliuoksista sekä menetelmä heksasyanoferraattien valmistamiseksi |
-
2018
- 2018-07-09 CN CN201880046430.3A patent/CN110869524B/zh active Active
- 2018-07-09 CA CA3068780A patent/CA3068780A1/en not_active Abandoned
- 2018-07-09 US US16/629,361 patent/US11155895B2/en active Active
- 2018-07-09 WO PCT/EP2018/068575 patent/WO2019011876A1/de unknown
- 2018-07-09 KR KR1020207000447A patent/KR20200029438A/ko not_active Application Discontinuation
- 2018-07-09 EP EP18753059.7A patent/EP3652355A1/de not_active Withdrawn
- 2018-07-09 AU AU2018299849A patent/AU2018299849A1/en not_active Abandoned
- 2018-07-09 BR BR112020000290-9A patent/BR112020000290A2/pt not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CN110869524B (zh) | 2022-07-05 |
AU2018299849A1 (en) | 2020-02-06 |
CA3068780A1 (en) | 2019-01-17 |
KR20200029438A (ko) | 2020-03-18 |
US11155895B2 (en) | 2021-10-26 |
WO2019011876A1 (de) | 2019-01-17 |
CN110869524A (zh) | 2020-03-06 |
US20200208239A1 (en) | 2020-07-02 |
BR112020000290A2 (pt) | 2020-07-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20180320247A1 (en) | Process for producing lithium carbonate from concentrated lithium brine | |
AU2015330958B2 (en) | Recovery process | |
DE69820304T2 (de) | Verfahren zur isolierung und herstellung von produkten auf magnesiumbasis | |
EP3589763B1 (de) | Verfahren zur herstellung von lithiumhydroxid aus lithiumhaltigem erz | |
RU2408534C2 (ru) | Способ получения растворов гидроксида цезия | |
KR20190084081A (ko) | 리튬 회수 방법 | |
DE2722615A1 (de) | Verfahren zur reinigung von molybdaenoxidkonzentraten | |
JP2015519474A (ja) | 希土類抽出のシステムおよび方法 | |
WO1988003911A1 (en) | Process for recovering metal values from jarosite solids | |
EP3589762B1 (de) | Verfahren zur herstellung von lithiumhydroxid aus lithiumhaltigem erz mittels chlorierung und chloralkali-prozess | |
DE3509373A1 (de) | Verfahren zum entfernen von vanadium bzw. konzentrationen anderer metalle | |
DE2807850A1 (de) | Verfahren zur herstellung reiner tonerde | |
DE60004406T2 (de) | Verfahren zur elektrolytischen herstellung von hochreinem zink oder zinkverbindungen aus primärem oder sekundärem zinkrohmaterial | |
DE2841271B2 (de) | Verfahren zur Aufarbeitung von Buntmetallhydroxidschlammrückständen | |
EP3652355A1 (de) | Verfahren zur cäsium-gewinnung aus wässrigen ausgangslösungen | |
NO146957B (no) | Fremgangsmaate ved utvinning av krominnholdet fra et kromholdig raamateriale. | |
DE3425582A1 (de) | Verfahren zur verbesserung der ausbeute an soda bei dem solvay-prozess | |
JP7284596B2 (ja) | 二水石膏の製造方法 | |
DE102011106864B4 (de) | Verfahren zur selektiven Abtrennung von Vanadium aus Rückständen der Titandioxidherstellung (Chloridverfahren) | |
DE102005045055A1 (de) | Verfahren zur Kaliumsulfatherstellung aus Kaliumchlorid und Schwefelsäure ohne Anfall von Chlorwasserstoff | |
DE2701710C3 (de) | Kontinuierliches Verfahren zum Gewinnen sehr reiner Tonerde aus titan- und eisenhaltigen, kaliumfreien aluminiumsilicatischen Stoffen | |
DE1099509B (de) | Verfahren zur kontinuierlichen Herstellung von Kryolith | |
US1912332A (en) | Recovery of zinc compounds from technical zinc liquors | |
DE10154004A1 (de) | Verfahren zur Gewinnung von Magnesiumhydroxid, Gips und weiteren Produkten aus natürlichen und technischen Salzsolen, insbesondere aus Endlaugen der Kaliwerke | |
JPS589820B2 (ja) | アルミニウム含有鉱石の処理から得られるアルミン酸アルカリ溶液からガリウムを回収する方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20200211 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): 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 |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C22B 3/22 20060101ALI20210929BHEP Ipc: C22B 26/10 20060101AFI20210929BHEP |
|
INTG | Intention to grant announced |
Effective date: 20211026 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20230201 |