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Recent results in the separation of metal chlorides by solvent extraction

Journal Article · · Sep. Sci. Technol.; (United States)
; ;

Solvent extraction is used to selectively separate an aqueous mixture of metal chlorides (Fe, Al and Ti) that is the product from the high-temperature chlorination of fly ash by the HiChlor prodcess. Tertiary amines dissolved in xylene or kerosene are used to separate the Fe from the Al and Ti. Prior to extraction, the organic solution is contacted with HCl to convert the amine to the chloride salt. Data on the effects of organic-to-aqueous ratio, Fe, Al and Ti loadings, and HCl concentration in the aqueous phase are reported. Iron is stripped from the loaded organic phase using dilute HCl. The raffinate is subjected to sparge crystallization with HCl to recover AlCl/sub 3/.6H/sub 2/O. The recovery of Ti from the aqueous phase after Fe removal requires the use of tributyl phosphate (TBP) in kerosene for the organic phase, and of higher acid concentrations. Decanol is used as a modifier to prevent formation of a third phase. 22 references, 9 figures, 2 tables.

Research Organization:
Iowa State Univ., Ames
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
6299206
Journal Information:
Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 18:14-15; ISSN SSTED
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010500 -- Coal
Lignite
& Peat-- Products & By-Products
010800* -- Coal
Lignite
& Peat-- Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
AEROSOL WASTES
ALCOHOLS
ALKYLATED AROMATICS
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMINES
AQUEOUS SOLUTIONS
AROMATICS
ASHES
BUTYL PHOSPHATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORIDES
CHLORINATION
CHLORINE COMPOUNDS
DATA
DECANOLS
DIAGRAMS
DISPERSIONS
ELEMENTS
ESTERS
EXPERIMENTAL DATA
EXTRACTION
FLOWSHEETS
FLY ASH
FUELS
HALIDES
HALOGEN COMPOUNDS
HALOGENATION
HICHLOR PROCESS
HYDROCARBONS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON
IRON CHLORIDES
IRON COMPOUNDS
ISOTHERM
KEROSENE
LIQUID FUELS
MANAGEMENT
MATERIALS RECOVERY
METALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
PH VALUE
PHOSPHORIC ACID ESTERS
PROCESSING
QUANTITY RATIO
RECOVERY
RESIDUES
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENT PROPERTIES
TBP
TITANIUM
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
XYLENES