Separations by supported liquid membrane cascades

Patent · 01 September 1983

OSTI ID:7139303

Danesi, P R

The invention describes a new separation technique which leads to multi-stage operations by the use of a series (a cascade) of alternated carrier-containing supported-liquid cation exchanger extractant and a liquid anion exchanger extractant (or a neutral extractant) as carrier. The membranes are spaced between alternated aqueous electrolytic solutions of different composition which alternatively provide positively charged extractable species and negatively charged (or zero charged) extractable species, of the chemical species to be separated. The alternated aqueous electrolytic solutions in addition to providing the driving force to the process, simultaneously function as a stripping solution from one type of membrane and as an extraction-promoting solution for the other type of membrane. The aqueous electrolytic solution and the supported liquid membranes are arranged to provide a continuous process.

• DOE Contract Number: W-31109-ENG-38
• Assignee: Dept. of Energy
• Patent Number(s): None
• Application Number: ON: DE84011302
• OSTI ID: 7139303
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
CATIONS
CHARGED PARTICLES
EXTRACTION
ION EXCHANGE MATERIALS
IONS
MATERIALS
MEMBRANES
SEPARATION PROCESSES
SOLVENT EXTRACTION