SE428704B - Forfarande vid elektrolys av natriumklorid - Google Patents
Forfarande vid elektrolys av natriumkloridInfo
- Publication number
- SE428704B SE428704B SE7810490A SE7810490A SE428704B SE 428704 B SE428704 B SE 428704B SE 7810490 A SE7810490 A SE 7810490A SE 7810490 A SE7810490 A SE 7810490A SE 428704 B SE428704 B SE 428704B
- Authority
- SE
- Sweden
- Prior art keywords
- sodium chloride
- solution
- iron
- ppm
- content
- Prior art date
Links
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 title claims description 154
- 239000011780 sodium chloride Substances 0.000 title claims description 77
- 238000000034 method Methods 0.000 title claims description 16
- 239000000243 solution Substances 0.000 claims description 54
- -1 iron ions Chemical class 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- PANJMBIFGCKWBY-UHFFFAOYSA-N iron tricyanide Chemical compound N#C[Fe](C#N)C#N PANJMBIFGCKWBY-UHFFFAOYSA-N 0.000 claims description 26
- 239000007864 aqueous solution Substances 0.000 claims description 25
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 238000005868 electrolysis reaction Methods 0.000 claims description 22
- 239000012528 membrane Substances 0.000 claims description 22
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 19
- 238000005341 cation exchange Methods 0.000 claims description 19
- 239000000460 chlorine Substances 0.000 claims description 19
- 229910052801 chlorine Inorganic materials 0.000 claims description 18
- 238000006864 oxidative decomposition reaction Methods 0.000 claims description 16
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 238000005342 ion exchange Methods 0.000 claims description 4
- 239000007858 starting material Substances 0.000 claims description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 57
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- NAVJNPDLSKEXSP-UHFFFAOYSA-N Fe(CN)2 Chemical class N#C[Fe]C#N NAVJNPDLSKEXSP-UHFFFAOYSA-N 0.000 description 8
- 239000003957 anion exchange resin Substances 0.000 description 8
- 239000000276 potassium ferrocyanide Substances 0.000 description 8
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 238000004090 dissolution Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 229910001424 calcium ion Inorganic materials 0.000 description 5
- 229920001429 chelating resin Polymers 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 229910001425 magnesium ion Inorganic materials 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 4
- 239000000347 magnesium hydroxide Substances 0.000 description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000005349 anion exchange Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000013522 chelant Substances 0.000 description 3
- 239000003014 ion exchange membrane Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- 235000010265 sodium sulphite Nutrition 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 235000014413 iron hydroxide Nutrition 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- UETZVSHORCDDTH-UHFFFAOYSA-N iron(2+);hexacyanide Chemical compound [Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] UETZVSHORCDDTH-UHFFFAOYSA-N 0.000 description 2
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 125000000542 sulfonic acid group Chemical group 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- BVYFGGZPLVYOQU-UHFFFAOYSA-N [K].N#C[Fe]C#N Chemical class [K].N#C[Fe]C#N BVYFGGZPLVYOQU-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
- ABDBNWQRPYOPDF-UHFFFAOYSA-N carbonofluoridic acid Chemical compound OC(F)=O ABDBNWQRPYOPDF-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- JFBJUMZWZDHTIF-UHFFFAOYSA-N chlorine chlorite Inorganic materials ClOCl=O JFBJUMZWZDHTIF-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006298 dechlorination reaction Methods 0.000 description 1
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- 125000001453 quaternary ammonium group Chemical group 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003335 secondary amines Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 125000000565 sulfonamide group Chemical group 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
- C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12051277A JPS5454998A (en) | 1977-10-08 | 1977-10-08 | Electrolysis of sodium chloride with ion exchange membrane |
| JP52142061A JPS58515B2 (ja) | 1977-11-26 | 1977-11-26 | 食塩水のイオン交換膜電解方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7810490L SE7810490L (sv) | 1979-04-09 |
| SE428704B true SE428704B (sv) | 1983-07-18 |
Family
ID=26458082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7810490A SE428704B (sv) | 1977-10-08 | 1978-10-06 | Forfarande vid elektrolys av natriumklorid |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4190505A (it) |
| BR (1) | BR7806644A (it) |
| CA (1) | CA1128459A (it) |
| DE (1) | DE2843479B2 (it) |
| FR (1) | FR2405310A1 (it) |
| GB (1) | GB2005723B (it) |
| IT (1) | IT1099790B (it) |
| NL (1) | NL177504C (it) |
| SE (1) | SE428704B (it) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5698487A (en) * | 1980-01-10 | 1981-08-07 | Asahi Glass Co Ltd | Purification method of potassium chloride brine |
| JPS5831394B2 (ja) * | 1980-04-30 | 1983-07-05 | 旭硝子株式会社 | 水酸化アルカリの製造方法 |
| US4303624A (en) * | 1980-09-12 | 1981-12-01 | Olin Corporation | Purification of alkali metal chloride brines |
| US4323437A (en) * | 1981-02-09 | 1982-04-06 | Fmc Corporation | Treatment of brine |
| FR2679221B1 (fr) * | 1991-07-19 | 1994-07-01 | Solvay | Procede de fabrication d'une solution aqueuse de chlorure de sodium et son utilisation. |
| BE1005291A3 (fr) * | 1991-09-10 | 1993-06-22 | Solvay | Procede de fabrication d'une solution aqueuse industrielle de chlorure de sodium et utilisation de la solution aqueuse de chlorure de sodium ainsi obtenue pour la fabrication electrolytique d'une solution aqueuse d'hydroxyde de sodium, pour la fabrication de carbonate de sodium et pour la fabrication de cristaux de chlorure de sodium. |
| DE19721449C2 (de) * | 1997-05-22 | 2002-04-25 | Zf Sachs Ag | Tragestruktur zum Tragen eines Elektromotors und Stellantrieb, umfassend eine derartige Tragestruktur |
| BRPI0918096B1 (pt) * | 2008-12-17 | 2019-05-28 | Thyssenkrupp Uhde Chlorine Engineers (Italia) S.R.L. | Processo de produção de cloro, hidróxido de metal alcalino e hidrogênio e dispositivo controlado por computador para conduzir um processo |
| JP5628403B1 (ja) * | 2013-11-22 | 2014-11-19 | 株式会社テックコーポレーション | 気泡電解水生成装置及び自動洗浄装置 |
| JP5840238B2 (ja) * | 2014-01-28 | 2016-01-06 | 京楽産業．株式会社 | 遊技機 |
| NL2014542B1 (nl) * | 2015-03-27 | 2017-01-06 | Van Den Heuvel Watertechnologie B V | Werkwijze en inrichting voor het behandelen van een effluentstroom afkomstig van een of meer elektrolysecellen. |
| CN106367778B (zh) * | 2016-08-29 | 2018-11-09 | 金川集团股份有限公司 | 一种回收高温湿氯气中热量的装置及方法 |
| CN115233234B (zh) * | 2022-06-27 | 2025-08-29 | 深圳氢致能源有限公司 | 一种抗电解海水阴极表面氯化钠结晶的方法 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4038365A (en) * | 1975-12-03 | 1977-07-26 | Basf Wyandotte Corporation | Removal of low level hardness impurities from brine feed to chlorine cells |
| DE2609828A1 (de) * | 1976-03-10 | 1977-09-15 | Bayer Ag | Verfahren zur reinigung von elektrolysesolen fuer diaphragmazellen |
-
1978
- 1978-09-29 CA CA312,394A patent/CA1128459A/en not_active Expired
- 1978-10-03 US US05/948,659 patent/US4190505A/en not_active Expired - Lifetime
- 1978-10-03 GB GB7839160A patent/GB2005723B/en not_active Expired
- 1978-10-05 DE DE2843479A patent/DE2843479B2/de not_active Ceased
- 1978-10-06 SE SE7810490A patent/SE428704B/sv not_active IP Right Cessation
- 1978-10-06 IT IT28532/78A patent/IT1099790B/it active
- 1978-10-06 BR BR7806644A patent/BR7806644A/pt unknown
- 1978-10-06 FR FR7828619A patent/FR2405310A1/fr active Granted
- 1978-10-06 NL NLAANVRAGE7810124,A patent/NL177504C/xx not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US4190505A (en) | 1980-02-26 |
| BR7806644A (pt) | 1979-05-02 |
| FR2405310A1 (fr) | 1979-05-04 |
| SE7810490L (sv) | 1979-04-09 |
| IT1099790B (it) | 1985-09-28 |
| DE2843479A1 (de) | 1979-04-12 |
| IT7828532A0 (it) | 1978-10-06 |
| GB2005723A (en) | 1979-04-25 |
| CA1128459A (en) | 1982-07-27 |
| DE2843479B2 (de) | 1980-04-03 |
| NL177504B (nl) | 1985-05-01 |
| FR2405310B1 (it) | 1983-07-18 |
| NL177504C (nl) | 1985-10-01 |
| NL7810124A (nl) | 1979-04-10 |
| GB2005723B (en) | 1982-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SE428704B (sv) | Forfarande vid elektrolys av natriumklorid | |
| RU1837950C (ru) | Способ очистки водного раствора сульфата цинка | |
| JPS60106583A (ja) | 沈殿可能な材料と酸及び／又は塩基を含む水性流の処理方法 | |
| SE448473B (sv) | Forfarande for elektrolys av en vattenhaltig natriumkloridlosning i en elektrolyscell med katjonbytarmembran | |
| EP0110033B1 (en) | Processing of sodium chloride brines for chlor-alkali membrane cells | |
| JPH08512099A (ja) | 硫化物を含有する白液の電解による多硫化物の製造 | |
| EP0098500B1 (en) | Removal of chlorate from electrolyte cell brine | |
| SE511003C2 (sv) | Förfarande och apparat för framställning av svavelsyra och alkalimetallhydroxid | |
| US4049519A (en) | Carbonate reduction | |
| US5578181A (en) | Method for treating waste water containing neutral salts comprising monovalent ions | |
| JPS63247387A (ja) | 塩素酸ナトリウムの連続的製造方法 | |
| US4483754A (en) | Electrolysis of sodium chloride with the use of ion exchange membranes | |
| US4397720A (en) | Removal of chlorate and hypochlorite from electrolyte cell brine | |
| US4636288A (en) | Electrodialytic conversion of multivalent metal salts | |
| JPH033747B2 (it) | ||
| KR850001577B1 (ko) | 막(膜)전해조 염수 공급액의 처리 방법 | |
| EP0103356A2 (en) | Method of making and color stabilization of choline base | |
| JPH01123087A (ja) | 隔膜セル内で塩化アルカリ水溶液を電気分解することにより水酸化アルカリと塩素と水素とを製造する方法 | |
| US4190508A (en) | Process for removing chalcophile elements from aqueous solutions by electrolysis | |
| SE461227B (sv) | Foerfarande foer avlaegsnande av dikromat fraan en loesning innehaallande klorat-, hypoklorit- och dikromatjoner | |
| SK49793A3 (en) | Process for preparing alkali metal chlorate (v) and device for its executing | |
| US3998710A (en) | Process for electrolytically purifying a photographic waste solution | |
| US4323436A (en) | Purification of aqueous solution of potassium chloride | |
| JP2011161365A (ja) | ヒドラジン含有排水の処理方法 | |
| DE4109434C2 (de) | Verfahren zum Aufarbeiten von chromathaltigen Abwässern und/oder Prozeßlösungen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NAL | Patent in force |
Ref document number: 7810490-8 Format of ref document f/p: F |
|
| NUG | Patent has lapsed |
Ref document number: 7810490-8 Format of ref document f/p: F |