METHOD OF RECOVERING METAL CATALYST

PURPOSE: To inexpensively recover Rh and Ru catalysts from solutions of hydrogenated nitrile rubbers, by using an absorbent comprising a specific organosiloxane copolymer. CONSTITUTION: Rh and/or Ru compounds, used for the homogeneous catalysis of hydrogenation of nitrile rubbers using hydrogen in o...

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Bibliographische Detailangaben
Hauptverfasser:	HARUTOMUUTO BUDEINGU, BERUNAA OBUREHITO, SUTEFUAN BIIRANTO, PEETAA PANSUTAA
Format:	Patent
Sprache:	eng
Schlagworte:	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 TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
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Beschreibung
Zusammenfassung:	PURPOSE: To inexpensively recover Rh and Ru catalysts from solutions of hydrogenated nitrile rubbers, by using an absorbent comprising a specific organosiloxane copolymer. CONSTITUTION: Rh and/or Ru compounds, used for the homogeneous catalysis of hydrogenation of nitrile rubbers using hydrogen in organic solvents, are recovered from solutions of hydrogenated nitrile rubbers. Here, absorbents comprising specific organosiloxane copolycondensates corresponding to formulae I-III are used. As a result, Rh and Ru catalysts are recovered inexpensively from solutions of hydrogenated nitrile rubbers.