CA1163419A - Methode pour separer des composes chromes d'halates de metaux alcalins - Google Patents

Methode pour separer des composes chromes d'halates de metaux alcalins

Info

Publication number: CA1163419A
Authority: CA; Canada
Prior art keywords: chromium; iron; alkali metal; compound; halate
Prior art date: 1981-05-15
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.): Expired

Application number

CA000401678A

Other languages

English (en)

Inventor

Theodore H. Dexter

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Occidental Chemical Corp

Original Assignee

Occidental Chemical Corp

Priority date (The priority date 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 date listed.)

1981-05-15

Filing date

1982-04-26

Publication date

1984-03-13

1982-04-26 Application filed by Occidental Chemical Corp filed Critical Occidental Chemical Corp

1984-03-13 Application granted granted Critical

1984-03-13 Publication of CA1163419A publication Critical patent/CA1163419A/fr

Status Expired legal-status Critical Current

Links

229910052783 alkali metal Inorganic materials 0.000 title claims abstract description 37
150000001340 alkali metals Chemical class 0.000 title claims abstract description 26
150000001845 chromium compounds Chemical class 0.000 title claims abstract description 22
238000000034 method Methods 0.000 title claims description 53
230000008569 process Effects 0.000 title claims description 46
OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims abstract description 51
VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 41
BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 claims abstract description 39
XTEGARKTQYYJKE-UHFFFAOYSA-M Chlorate Chemical compound [O-]Cl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-M 0.000 claims abstract description 38
JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical class [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims abstract description 24
239000002244 precipitate Substances 0.000 claims abstract description 19
239000007800 oxidant agent Substances 0.000 claims abstract description 16
239000000047 product Substances 0.000 claims abstract description 15
238000006243 chemical reaction Methods 0.000 claims abstract description 14
UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 9
239000011790 ferrous sulphate Substances 0.000 claims abstract description 8
235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 8
229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 8
NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 7
238000004064 recycling Methods 0.000 claims abstract description 5
239000007844 bleaching agent Substances 0.000 claims abstract description 4
BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract 5
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 38
-1 iron (II) compound Chemical class 0.000 claims description 33
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 32
239000002002 slurry Substances 0.000 claims description 27
CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 26
239000007787 solid Substances 0.000 claims description 23
WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 19
229910052742 iron Inorganic materials 0.000 claims description 19
238000004519 manufacturing process Methods 0.000 claims description 16
239000000203 mixture Substances 0.000 claims description 16
239000011780 sodium chloride Substances 0.000 claims description 16
239000005708 Sodium hypochlorite Substances 0.000 claims description 14
SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical group [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 14
150000003839 salts Chemical class 0.000 claims description 13
XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical compound OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 claims description 12
239000003638 chemical reducing agent Substances 0.000 claims description 8
239000013078 crystal Substances 0.000 claims description 5
230000003647 oxidation Effects 0.000 claims description 5
238000007254 oxidation reaction Methods 0.000 claims description 5
VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
239000003513 alkali Substances 0.000 claims description 4
229910002651 NO3 Inorganic materials 0.000 claims description 3
NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 3
CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 3
238000011109 contamination Methods 0.000 claims description 3
230000007613 environmental effect Effects 0.000 claims description 3
229960002089 ferrous chloride Drugs 0.000 claims description 3
150000002429 hydrazines Chemical class 0.000 claims description 3
NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 3
FPNCFEPWJLGURZ-UHFFFAOYSA-L iron(2+);sulfite Chemical compound [Fe+2].[O-]S([O-])=O FPNCFEPWJLGURZ-UHFFFAOYSA-L 0.000 claims description 3
229910001508 alkali metal halide Inorganic materials 0.000 claims description 2
150000008045 alkali metal halides Chemical class 0.000 claims description 2
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
239000007795 chemical reaction product Substances 0.000 claims description 2
SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 claims description 2
239000001301 oxygen Substances 0.000 claims description 2
229910052760 oxygen Inorganic materials 0.000 claims description 2
229940099408 Oxidizing agent Drugs 0.000 claims 6
229940124024 weight reducing agent Drugs 0.000 claims 6
229960005076 sodium hypochlorite Drugs 0.000 claims 3
150000008044 alkali metal hydroxides Chemical class 0.000 claims 1
229910017053 inorganic salt Inorganic materials 0.000 claims 1
150000002978 peroxides Chemical class 0.000 claims 1
239000012535 impurity Substances 0.000 abstract description 11
238000000926 separation method Methods 0.000 abstract description 6
159000000014 iron salts Chemical class 0.000 abstract description 3
239000000243 solution Substances 0.000 description 45
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 32
239000011651 chromium Substances 0.000 description 26
229910052804 chromium Inorganic materials 0.000 description 24
238000007792 addition Methods 0.000 description 13
239000000706 filtrate Substances 0.000 description 12
OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 10
235000011121 sodium hydroxide Nutrition 0.000 description 10
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
238000001914 filtration Methods 0.000 description 9
HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 9
229910052788 barium Inorganic materials 0.000 description 7
DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 7
239000012267 brine Substances 0.000 description 7
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
239000000460 chlorine Substances 0.000 description 6
SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 6
238000001556 precipitation Methods 0.000 description 6
239000011541 reaction mixture Substances 0.000 description 6
239000004155 Chlorine dioxide Substances 0.000 description 5
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
229940099041 chlorine dioxide Drugs 0.000 description 5
235000019398 chlorine dioxide Nutrition 0.000 description 5
150000001875 compounds Chemical class 0.000 description 5
238000005406 washing Methods 0.000 description 5
MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
239000002253 acid Substances 0.000 description 4
QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 4
239000000463 material Substances 0.000 description 4
230000009467 reduction Effects 0.000 description 4
229910052708 sodium Inorganic materials 0.000 description 4
239000011734 sodium Substances 0.000 description 4
239000005909 Kieselgur Substances 0.000 description 3
KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
229910052801 chlorine Inorganic materials 0.000 description 3
229910001902 chlorine oxide Inorganic materials 0.000 description 3
239000012065 filter cake Substances 0.000 description 3
238000011084 recovery Methods 0.000 description 3
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical class [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
239000007864 aqueous solution Substances 0.000 description 2
230000008901 benefit Effects 0.000 description 2
239000004202 carbamide Substances 0.000 description 2
239000003795 chemical substances by application Substances 0.000 description 2
ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical compound [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 2
239000003792 electrolyte Substances 0.000 description 2
238000003754 machining Methods 0.000 description 2
239000012528 membrane Substances 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
150000002739 metals Chemical class 0.000 description 2
238000012986 modification Methods 0.000 description 2
230000004048 modification Effects 0.000 description 2
BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical class [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
PXLIDIMHPNPGMH-UHFFFAOYSA-N sodium chromate Chemical compound [Na+].[Na+].[O-][Cr]([O-])(=O)=O PXLIDIMHPNPGMH-UHFFFAOYSA-N 0.000 description 2
DIIIISSCIXVANO-UHFFFAOYSA-N 1,2-Dimethylhydrazine Chemical compound CNNC DIIIISSCIXVANO-UHFFFAOYSA-N 0.000 description 1
JHWIEAWILPSRMU-UHFFFAOYSA-N 2-methyl-3-pyrimidin-4-ylpropanoic acid Chemical compound OC(=O)C(C)CC1=CC=NC=N1 JHWIEAWILPSRMU-UHFFFAOYSA-N 0.000 description 1
KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
235000008733 Citrus aurantifolia Nutrition 0.000 description 1
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical class [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 1
ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
229910000831 Steel Inorganic materials 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
239000005864 Sulphur Substances 0.000 description 1
235000011941 Tilia x europaea Nutrition 0.000 description 1
230000002378 acidificating effect Effects 0.000 description 1
230000009471 action Effects 0.000 description 1
230000002411 adverse Effects 0.000 description 1
WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
229910001626 barium chloride Inorganic materials 0.000 description 1
159000000009 barium salts Chemical class 0.000 description 1
239000002585 base Substances 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
230000005587 bubbling Effects 0.000 description 1
230000003197 catalytic effect Effects 0.000 description 1
239000003518 caustics Substances 0.000 description 1
238000005119 centrifugation Methods 0.000 description 1
238000001311 chemical methods and process Methods 0.000 description 1
238000012824 chemical production Methods 0.000 description 1
239000003153 chemical reaction reagent Substances 0.000 description 1
229910001919 chlorite Inorganic materials 0.000 description 1
229910052619 chlorite group Inorganic materials 0.000 description 1
QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
229910017052 cobalt Inorganic materials 0.000 description 1
239000010941 cobalt Substances 0.000 description 1
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical class [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
238000001816 cooling Methods 0.000 description 1
229910052802 copper Inorganic materials 0.000 description 1
239000010949 copper Chemical class 0.000 description 1
238000000354 decomposition reaction Methods 0.000 description 1
238000002845 discoloration Methods 0.000 description 1
230000009977 dual effect Effects 0.000 description 1
238000005868 electrolysis reaction Methods 0.000 description 1
230000008030 elimination Effects 0.000 description 1
238000003379 elimination reaction Methods 0.000 description 1
AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
150000004820 halides Chemical class 0.000 description 1
231100000206 health hazard Toxicity 0.000 description 1
LOEUCBBZEHMJQN-UHFFFAOYSA-N hydrazine;oxalic acid Chemical compound NN.OC(=O)C(O)=O LOEUCBBZEHMJQN-UHFFFAOYSA-N 0.000 description 1
239000001257 hydrogen Substances 0.000 description 1
229910052739 hydrogen Inorganic materials 0.000 description 1
229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical class [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
238000011065 in-situ storage Methods 0.000 description 1
150000002506 iron compounds Chemical class 0.000 description 1
229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
239000004571 lime Substances 0.000 description 1
238000011068 loading method Methods 0.000 description 1
238000002156 mixing Methods 0.000 description 1
HDZGCSFEDULWCS-UHFFFAOYSA-N monomethylhydrazine Chemical compound CNN HDZGCSFEDULWCS-UHFFFAOYSA-N 0.000 description 1
230000007935 neutral effect Effects 0.000 description 1
229910052759 nickel Chemical class 0.000 description 1
235000019645 odor Nutrition 0.000 description 1
229910052697 platinum Inorganic materials 0.000 description 1
238000010935 polish filtration Methods 0.000 description 1
238000000247 postprecipitation Methods 0.000 description 1
229910052700 potassium Inorganic materials 0.000 description 1
239000011591 potassium Substances 0.000 description 1
VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
230000003334 potential effect Effects 0.000 description 1
239000000376 reactant Substances 0.000 description 1
230000001105 regulatory effect Effects 0.000 description 1
238000009877 rendering Methods 0.000 description 1
238000010956 selective crystallization Methods 0.000 description 1
DUIOPKIIICUYRZ-UHFFFAOYSA-N semicarbazide Chemical compound NNC(N)=O DUIOPKIIICUYRZ-UHFFFAOYSA-N 0.000 description 1
229910000029 sodium carbonate Inorganic materials 0.000 description 1
YZHUMGUJCQRKBT-UHFFFAOYSA-M sodium chlorate Chemical compound [Na+].[O-]Cl(=O)=O YZHUMGUJCQRKBT-UHFFFAOYSA-M 0.000 description 1
229910052979 sodium sulfide Inorganic materials 0.000 description 1
GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
WLEGVBWDHBDGSY-UHFFFAOYSA-M sodium;chloric acid;chloride Chemical compound [Na+].[Cl-].OCl(=O)=O WLEGVBWDHBDGSY-UHFFFAOYSA-M 0.000 description 1
239000010959 steel Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1
231100000331 toxic Toxicity 0.000 description 1
230000002588 toxic effect Effects 0.000 description 1
231100001234 toxic pollutant Toxicity 0.000 description 1

Landscapes

Treatment Of Water By Oxidation Or Reduction (AREA)

CA000401678A 1981-05-15 1982-04-26 Methode pour separer des composes chromes d'halates de metaux alcalins Expired CA1163419A (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US26415781A	1981-05-15	1981-05-15
US264,157		1981-05-15

Publications (1)

Publication Number	Publication Date
CA1163419A true CA1163419A (fr)	1984-03-13

Family

ID=23004860

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA000401678A Expired CA1163419A (fr)	1981-05-15	1982-04-26	Methode pour separer des composes chromes d'halates de metaux alcalins

Country Status (1)

Country	Link
CA (1)	CA1163419A (fr)

1982
- 1982-04-26 CA CA000401678A patent/CA1163419A/fr not_active Expired

Legal Events

Date	Code	Title	Description
2001-03-13	MKEX	Expiry

Publication	Publication Date	Title
US5746994A (en)	1998-05-05	Method for synthesizing ferrate and ferrate produced thereby
US5211853A (en)	1993-05-18	Method for the removal of chromium compounds from aqueous solutions
US4405465A (en)	1983-09-20	Process for the removal of chlorate and hypochlorite from spent alkali metal chloride brines
EP0082590B1 (fr)	1985-09-11	Procédé de préparation de ferrate de potassium
CA1252414A (fr)	1989-04-11	Electrolyse d'une solution de chlorure de metal alcalin
EP0498484B1 (fr)	1993-06-09	Procédé de production électrolytique de chlorate de métal alcalin et de produits chimiques auxiliaires
US4268486A (en)	1981-05-19	Selective chromate removal from a chlorate solution
US4259297A (en)	1981-03-31	Chromate removal from concentrated chlorate solution by chemical precipitation
US4086150A (en)	1978-04-25	Chromate removal by precipitation
US4481088A (en)	1984-11-06	Removal of chlorate from electrolyte cell brine
US5294307A (en)	1994-03-15	Integrated process for the production of alkali and alkaline earth metal chlorates and chlorine dioxide
US4397720A (en)	1983-08-09	Removal of chlorate and hypochlorite from electrolyte cell brine
US4804528A (en)	1989-02-14	Stripping and recovery of dichromate in electrolytic chlorate systems
EP0246871B1 (fr)	1989-11-15	Elimination du chrome d'une solution d'électrolyte
US5176801A (en)	1993-01-05	Sulfate removal from alkali metal chlorate solutions and production of alkali metal chlorate including said removal
GB2387606A (en)	2003-10-22	Electrolytic recovery of vanadium
CA1163419A (fr)	1984-03-13	Methode pour separer des composes chromes d'halates de metaux alcalins
US4376099A (en)	1983-03-08	Process for recovering Cr(VI) ions from a chlorate cell liquor
US3843769A (en)	1974-10-22	Process for removing hexavalent chromium from chlorate containing liquors
US3690845A (en)	1972-09-12	Crystallization of a metal chlorate from a chlorate-chloride containing solution
US5397482A (en)	1995-03-14	Treatment of cyanides in effluents with Caro's acid
US5350495A (en)	1994-09-27	Method for separating impurities from an aqueous alkali metal chlorate electrolyte
CA2100948C (fr)	1995-01-24	Procede pour l'elimination du chrome, utilisant un compose de soufre
US5254321A (en)	1993-10-19	Process for chromium removal using an inorganic sulfur compound
US5409680A (en)	1995-04-25	Purification of aqueous alkali metal chlorate solutions