SE8900332A - - Google Patents

Info

Publication number
SE8900332A
SE8900332A SE8900332A SE8900332A SE8900332A SE 8900332 A SE8900332 A SE 8900332A SE 8900332 A SE8900332 A SE 8900332A SE 8900332 A SE8900332 A SE 8900332A SE 8900332 A SE8900332 A SE 8900332A
Authority
SE
Sweden
Prior art keywords
chlorate
dichromate
produced
dichromates
electrolysis
Prior art date
Application number
SE8900332A
Other versions
SE461227B (en
SE8900332D0 (en
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.)
Filing date
Publication date
Application filed filed Critical
Publication of SE8900332D0 publication Critical patent/SE8900332D0/en
Publication of SE8900332A publication Critical patent/SE8900332A/xx
Publication of SE461227B publication Critical patent/SE461227B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00—Oxides or oxyacids of halogens; Salts thereof
    • C01B11/12—Chloric acid
    • C01B11/14—Chlorates
    • C01B11/145—Separation; Crystallisation; Purification, After-treatment; Stabilisation by additives
    • 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
    • C25B1/24—Halogens or compounds thereof
    • C25B1/26—Chlorine; Compounds thereof
    • C25B1/265—Chlorates
    • 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
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S204/00—Chemistry: electrical and wave energy
    • Y10S204/13—Purification and treatment of electroplating baths and plating wastes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/902—Materials removed
    • Y10S210/911—Cumulative poison
    • Y10S210/912—Heavy metal
    • Y10S210/913—Chromium

Abstract

A process for removing dichromates from chlorate-rich solutions containing hypochlorite and dichromate ions and produced by the electrolysis of brine. The dichromate is reduced in a two-stage process by the addition of ammonia under controlled conditions of pH and temperature to a mixed di- and trivalent chromium hydroxide which is precipitated from solution and removed. The process provides an economical method of recovering chromium from electrolytically produced chlorate solutions.
SE8900332A 1987-09-14 1989-01-31 PROCEDURES FOR DISPOSAL OF DICHROMATE FROM A SOLUTION CONTAINING CHLORATE, HYPOCLORITE AND DICROMATIONS SE461227B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000546835A CA1314688C (en) 1987-09-14 1987-09-14 Stripping and recovery of dichromate in electrolytic chlorate systems

Publications (3)

Publication Number Publication Date
SE8900332D0 SE8900332D0 (en) 1989-01-31
SE8900332A true SE8900332A (en) 1990-01-22
SE461227B SE461227B (en) 1990-01-22

Family

ID=4136437

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8900332A SE461227B (en) 1987-09-14 1989-01-31 PROCEDURES FOR DISPOSAL OF DICHROMATE FROM A SOLUTION CONTAINING CHLORATE, HYPOCLORITE AND DICROMATIONS

Country Status (12)

Country Link
US (1) US4804528A (en)
EP (1) EP0308175B1 (en)
CN (1) CN1015088B (en)
AU (1) AU611465B2 (en)
BR (1) BR8804713A (en)
CA (1) CA1314688C (en)
ES (1) ES2039633T3 (en)
FI (1) FI90438C (en)
NZ (1) NZ225601A (en)
PT (1) PT88498B (en)
SE (1) SE461227B (en)
ZA (1) ZA886083B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5000858A (en) * 1989-07-17 1991-03-19 Coltec Industries Inc. Method for removing hexavalent chromium from water
US5093089A (en) * 1990-07-16 1992-03-03 Chemetics International Company Ltd. Process for the separation of sulphate
US5211853A (en) * 1992-07-31 1993-05-18 Huron Tech Corp. Method for the removal of chromium compounds from aqueous solutions
US5294307A (en) * 1992-07-31 1994-03-15 Huron Tech Corp Integrated process for the production of alkali and alkaline earth metal chlorates and chlorine dioxide
EP0766197A4 (en) * 1995-04-13 1999-12-29 Dainippon Printing Co Ltd Ic card and ic module
JPWO2010026886A1 (en) * 2008-09-05 2012-02-02 日本化学工業株式会社 Method for producing chromium hydroxide
RU2518899C2 (en) * 2009-05-15 2014-06-10 Акцо Нобель Кемикалз Интернэшнл Б.В. Cathode activation
US9663383B2 (en) * 2010-03-23 2017-05-30 Lanxess Deutschland Gmbh Process for preparing chromium(III) oxide
EP2565162A1 (en) * 2011-09-05 2013-03-06 LANXESS Deutschland GmbH Method for producing chromium (III) oxide
AR084183A1 (en) 2010-12-08 2013-04-24 Lanxess Deutschland Gmbh PROCEDURE FOR THE PRODUCTION OF CHROME OXIDE (III)
JP6331145B2 (en) * 2014-11-26 2018-05-30 三菱重工環境・化学エンジニアリング株式会社 Ammonia treatment system
CN113088981B (en) * 2021-04-10 2022-06-24 贵州丝域环能科技有限公司 Preparation, treatment and regeneration method of stainless steel pickling passivation solution

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE218495C1 (en) * 1964-03-10 1968-01-23
US3843769A (en) * 1972-01-20 1974-10-22 Hooker Chemical Corp Process for removing hexavalent chromium from chlorate containing liquors
JPS5521508A (en) * 1978-07-31 1980-02-15 Nippon Denko Kk Recovering method for useful substance from aged solution of chromic acid
US4268486A (en) * 1979-07-02 1981-05-19 Olin Corporation Selective chromate removal from a chlorate solution
CA1112845A (en) * 1979-07-16 1981-11-24 Ian H. Warren Destruction of sodium hypochlorite in solutions from a chlorate electrolytic cell
US4259297A (en) * 1979-09-04 1981-03-31 Olin Corporation Chromate removal from concentrated chlorate solution by chemical precipitation
IT1130595B (en) * 1980-05-12 1986-06-18 Stoppani Luigi Spa CONTINUOUS PROCEDURE FOR THE ELEMINATION OF CHROME FROM WASTE WATER AND THE VALORISATION OF RECOVERED CHROME
US4477318A (en) * 1980-11-10 1984-10-16 Omi International Corporation Trivalent chromium electrolyte and process employing metal ion reducing agents
US4680126A (en) * 1986-02-18 1987-07-14 Frankard James M Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters
CA1242307A (en) * 1986-05-21 1988-09-27 Superior Plus Inc. / Superieur Plus Inc. Removal of chromium from cell liquor

Also Published As

Publication number Publication date
FI90438C (en) 1994-02-10
BR8804713A (en) 1989-04-18
ES2039633T3 (en) 1993-10-01
ZA886083B (en) 1989-04-26
EP0308175B1 (en) 1992-01-29
PT88498A (en) 1988-10-01
CA1314688C (en) 1993-03-23
FI884230A0 (en) 1988-09-14
PT88498B (en) 1992-11-30
SE461227B (en) 1990-01-22
AU611465B2 (en) 1991-06-13
US4804528A (en) 1989-02-14
FI884230A (en) 1989-03-15
SE8900332D0 (en) 1989-01-31
CN1031945A (en) 1989-03-29
CN1015088B (en) 1991-12-18
FI90438B (en) 1993-10-29
AU2034188A (en) 1989-03-16
NZ225601A (en) 1989-09-27
EP0308175A1 (en) 1989-03-22

Similar Documents

Publication Publication Date Title
SE8900332A (en)
EP0255756A3 (en) Method for producing high purity quaternary ammonium hydroxides
CA2079632A1 (en) Method for the removal of chromium compounds from aqueous solutions
SE7903646L (en) REMOVAL OF HARDNESS COMPOUNDS FROM ALKALIMETALLY CHLORIDE SALT SOLUTIONS, WHICH POLLUTIONS INCLUDE IN QUANTITIES OF THE SIZE BILLION
DE3481413D1 (en) METHOD FOR PRODUCING HIGH PURITY MAGNESIUM OXIDE.
IE44467L (en) Recovery of zinc.
ES8104428A1 (en) Method of producing very pure magnesium oxide
EP0266801A3 (en) Process for manufacturing alkali hydroxide, chlorine and hydrogen by electrolysis of an aqueous alkali chloride solution in a membrane cell
GB1521405A (en) Method of recovering values contained in solid waste of chromic anhydride production
GB1514023A (en) Waste treatment of fluoroborate solutions
ES2033580A1 (en) Process for the separation of sulphate
CA2037718A1 (en) Sulfate removal from alkali metal chlorate solutions and production of alkali metal chlorate including said removal
DE3071988D1 (en) Process for producing oxhydryl-containing nickel compounds and compounds thus obtained
DE3472982D1 (en) Treatment process of a purge solution, particularly used in the electrolytical winning of zinc
US3843769A (en) Process for removing hexavalent chromium from chlorate containing liquors
GB1271112A (en) Phosphate removal from waste water
GB2005645A (en) A process for purifying an aqueous solution of an alkali metal halide for electrolysis
GB1515550A (en) Method for the recovery of ammonia
ES8702301A1 (en) Process for the preparation of fine, very pure calcium carbonate with a high degree of whiteness.
ES2095181A1 (en) Method for removing impurities from an alkali metal chlorate process
AU1792388A (en) Process for recovering chromic anhydride from exhausted aqueous chromium plating bath solutions with exploitation of the recovered chromium
GB1524119A (en) Lime recovery process
JPS5698487A (en) Purification method of potassium chloride brine
GB1389870A (en) Purification of alkalimetal chloride brine
DE3268154D1 (en) Selective acylation of hydroxy-amino-arylsulfonic acids

Legal Events

Date Code Title Description
NAL Patent in force

Ref document number: 8900332-1

Format of ref document f/p: F

NUG Patent has lapsed

Ref document number: 8900332-1

Format of ref document f/p: F