GB960545A - Recovery of chromium values - Google Patents

Recovery of chromium values

Info

Publication number
GB960545A
GB960545A GB3970962A GB3970962A GB960545A GB 960545 A GB960545 A GB 960545A GB 3970962 A GB3970962 A GB 3970962A GB 3970962 A GB3970962 A GB 3970962A GB 960545 A GB960545 A GB 960545A
Authority
GB
United Kingdom
Prior art keywords
quaternary ammonium
ammonium compound
carbon atoms
organic phase
chloride
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.)
Expired
Application number
GB3970962A
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.)
General Mills Inc
Original Assignee
General Mills Inc
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 by General Mills Inc filed Critical General Mills Inc
Publication of GB960545A publication Critical patent/GB960545A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Extraction Or Liquid Replacement (AREA)

Abstract

Hexavalent chromium values are recovered from aqueous solutions by treating said solution with an organic phase containing a trisfatty quaternary ammonium compound. The organic phase is separated from the aqueous phase and then stripped of its chromium values using an aqueous stripping solution which may contain alkali metal, alkaline earth metal or ammonia salts. Specified stripping agents are sodium nitrate or chloride, ammonium nitrates or chloride and calcium chloride. The organic phase in addition to the quarternary ammonium compound may include a diluent of kerosene or fuel oil, and a conditioner which may be a long chain aliphatic alcohol or phosphorus acid ester. The quaternary ammonium compound preferably contains an alkyl group of 1-4 carbon atoms and 3 fatty groups which have 8-18 carbon atoms and may be the same or different. Quaternary ammonium compounds which are used may be chloride, sulphate, bisulphate, sulphite, bisulphite or nitrate, bisulphate being preferred. Liquid-liquid extraction in a continuous countercurrent unit is referred to.ALSO:In the recovery of hexavalent chromium values aqueous solutions are treated with an organic phase containing a trisfatty quaternary ammonium compound yielding a quaternary ammonium compound chromate. The quaternary ammonium compound has one alkyl group having 1-4 carbon atoms and three aliphatic hydrocarbon groups having 8-18 carbon atoms.
GB3970962A 1961-10-19 1962-10-19 Recovery of chromium values Expired GB960545A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14634961A 1961-10-19 1961-10-19

Publications (1)

Publication Number Publication Date
GB960545A true GB960545A (en) 1964-06-10

Family

ID=22516974

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3970962A Expired GB960545A (en) 1961-10-19 1962-10-19 Recovery of chromium values

Country Status (1)

Country Link
GB (1) GB960545A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502136A1 (en) * 1981-03-18 1982-09-24 Krebs Cie Sa METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION
EP0332447A1 (en) * 1988-03-09 1989-09-13 Unc Reclamation, Inc. Selective removal of metal cations from aqueous effluent solutions
CN102494926A (en) * 2011-11-16 2012-06-13 深圳出入境检验检疫局工业品检测技术中心 Method for extracting soluble hexavalent chromium compounds from polymer materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502136A1 (en) * 1981-03-18 1982-09-24 Krebs Cie Sa METHOD AND SOLVENT FOR EXTRACTING CHROMATES PRESENT IN AQUEOUS SOLUTION
EP0332447A1 (en) * 1988-03-09 1989-09-13 Unc Reclamation, Inc. Selective removal of metal cations from aqueous effluent solutions
US4956154A (en) * 1988-03-09 1990-09-11 Unc Reclamation Selective removal of chromium, nickel, cobalt, copper and lead cations from aqueous effluent solutions
CN102494926A (en) * 2011-11-16 2012-06-13 深圳出入境检验检疫局工业品检测技术中心 Method for extracting soluble hexavalent chromium compounds from polymer materials

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