SYSTEM SUITABLE FOR SEPARATING SELECTED IONS FROM SOLUTIONS AND THICKENING, REMOVAL AND ISOLATION PROCESS OF THE SELECTED IONS FROM A SOURCE SOLUTION
A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophi...
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Main Authors | , , , , |
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Format | Patent |
Language | English |
Published |
17.09.1997
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Abstract | A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophilic surface properties. The ligand portion of the composition has affinity for and forms a complex with the selected ions, thereby removing them from the source solution. The selected ions are then removed from the composition through contact with a much smaller volume of a receiving solution in which the selected ions are either soluble or which has greater affinity for the selected ions than does the ligand portion of the composition, thereby quantitatively stripping the complexed ions from the ligand and recovering them in concentrated form in the receiving solution. The concentrated ions thus removed may be further separated and recovered by known methods. The process is useful in the removal of selected ions, including noble metals and other transition metals from a variety of source solutions such as are encountered in semiconductor, nuclear waste cleanup, metals refining, environmental cleanup, providing ultra high purity fluids, electric power, and other industrial enterprises. The invention is also drawn to the ligand-membrane compositions. |
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AbstractList | A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions comprises bringing the source solution in contact with a composition comprising an ion-binding ligand covalently bonded to a membrane having hydrophilic surface properties. The ligand portion of the composition has affinity for and forms a complex with the selected ions, thereby removing them from the source solution. The selected ions are then removed from the composition through contact with a much smaller volume of a receiving solution in which the selected ions are either soluble or which has greater affinity for the selected ions than does the ligand portion of the composition, thereby quantitatively stripping the complexed ions from the ligand and recovering them in concentrated form in the receiving solution. The concentrated ions thus removed may be further separated and recovered by known methods. The process is useful in the removal of selected ions, including noble metals and other transition metals from a variety of source solutions such as are encountered in semiconductor, nuclear waste cleanup, metals refining, environmental cleanup, providing ultra high purity fluids, electric power, and other industrial enterprises. The invention is also drawn to the ligand-membrane compositions. |
Author | BRUENING RONALD L DILEO ANTHONY J SCARMOUTZOS LOUIS M GODDARD PHILIP M TARBET BRYON J |
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Snippet | A method for removing, separating, and concentrating certain selected ions from a source solution that may contain larger concentrations of other ions... |
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SubjectTerms | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DECONTAMINATION ARRANGEMENTS THEREFOR GENERAL PROCESSES OF COMPOUNDING METALLURGY NUCLEAR ENGINEERING NUCLEAR PHYSICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT SEPARATION THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING TREATING RADIOACTIVELY CONTAMINATED MATERIAL TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE WORKING-UP |
Title | SYSTEM SUITABLE FOR SEPARATING SELECTED IONS FROM SOLUTIONS AND THICKENING, REMOVAL AND ISOLATION PROCESS OF THE SELECTED IONS FROM A SOURCE SOLUTION |
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