Separation of metals by supported liquid membrane

Patent · Tue May 19 04:00:00 EDT 1992

OSTI ID:5128803

Takigawa, D Y

This patent describes a process of separating a preselected chemical species selected from the group consisting of aluminum, arsenic, antimony, bismuth, cadmium, chromium, copper, cobalt, gallium, gold, hafnium, indium, iridium, iron, lead, manganese, mercury, molybdenum, neodymium, nickel, niobium, osmium, palladium, platinum, rhenium, rhodium, ruthenium, selenium, silver, tantalum, tellurium, thallium, thorium, tin, tungsten, uranium, vanadium, zinc, or zirconium from a feedstream. It comprises providing a supported liquid membrane having both a first and a second side, the membrane comprised of microporous polybenzimidazole, the polybenzimidazole containing within the polybenzimidazole pores an extractant mixture selective for the preselected chemical species; contacting a feedstream containing the preselected chemical species with the first side of the supported liquid membrane in a feed compartment adjacent to the supported liquid membrane for a time sufficient to extract at least a portion of the preselected chemical species from the feedstream into the extractant mixture; and, contacting a stripping solution with the second side of the supported liquid membrane in a stripping compartment adjacent to the supported liquid membrane, for a time sufficient to extract at least a portion of the preselected chemical species from the extractant mixture into the stripping solution.

• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5114579; A
• Application Number: PPN: US 7-602460
• OSTI ID: 5128803
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACTINIDES
CADMIUM
CHEMICAL FEEDSTOCKS
ELEMENTS
HAFNIUM
IRIDIUM
MATERIALS
MEMBRANES
MERCURY
METALS
MOLYBDENUM
NEODYMIUM
NIOBIUM
PLATINUM METALS
RARE EARTHS
RAW MATERIALS
RUTHENIUM
SEPARATION PROCESSES
TRANSITION ELEMENTS
URANIUM
VANADIUM
ZINC
ZIRCONIUM