Separation of metals by supported liquid membrane

Patent · Tue May 19 00:00:00 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
• Resource Relation: Patent File Date: 22 Oct 1990
• Country of Publication: United States
• Language: English

Related Subjects

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