A process for removing iron-residues, rhodium- and ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber

A nitrile rubber, ruthenium catalyst technology, applied in the field of removing iron residues, rhodium-containing and ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber, capable of solving the problem of catalyst removal, nitrile rubber solution is not an alternative, Cost and other issues
CN101463097AInactive Publication Date: 2009-06-24LANXESS DEUTDCHLAND GMBH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LANXESS DEUTDCHLAND GMBH
Publication Date
2009-06-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process is provided for the removal of iron-residues, rhodium- and / or ruthenium-containing catalyst residues from a solution of optionally hydrogenated nitrile rubber containing such iron-residues, rhodium- and / or ruthenium-containing residues by contacting such solution with a specific functionalized ion exchange resin.
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Description

technical field

[0001] The present invention provides a process for removing iron residues, rhodium-containing and ruthenium-containing catalyst residues from optionally hydrogenated nitrile rubber. Background technique

[0002] Polymer hydrogenation is a well known procedure, as disclosed for example in US-A-4,396,761, US-A-4,510,293, US-A-5,258,467 and US-A-4,595,749. But the subsequent separation of the hydrogenation catalyst from the polymer is not always described in detail or not at all.

[0003] More precisely, certain rhodium-containing catalysts are known to be particularly suitable for the selective hydrogenation of nitrile rubber (ie reduction of the carbon-carbon double bonds present in nitrile rubber without concomitant reduction of the carbon-nitrogen triple bond). Such hydrogenated nitrile rubbers are less susceptible to heat-induced degradation than unsaturated nitrile rubbers.

[0004] For example, US-A-4,464,515 teaches that in a method for selectively hy...

Claims

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