POLYMER-SUPPORTED CHELATING AGENT

• Main Authors: BERGBREITER, DAVID E, CHOUIKHI, DALILA, BAZZI, HASSAN SAID, AL-HASHIMI, MOHAMMED
• Format: Patent
• Language: English
• Published: 29.11.2018
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; FERROUS OR NON-FERROUS ALLOYS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The polymer-supported chelating agent is polyisobutylene having a thiol-thioether terminal group. The polymer-supported chelating agent is made by reaction of the terminal carbon double bond of polyisobutylene with 1,2-ethanedithiol in a one-step click reaction, resulting in PIB functionalized with a thiol-thioether sequestering group. In use, the polymer-supported chelating agent is added to a biphasic solvent system containing a transition metal in solution for removal of the transition metal by liquid/liquid extraction. The transition metal is chelated or sequestered by the chelating agent and removed in a nonpolar organic phase, such as heptane.