Invention Application
- Patent Title: METHOD FOR RECOVERY AND RECYCLE OF RUTHENIUM HOMOGENEOUS CATALYSTS
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Application No.: US12889065Application Date: 2010-09-23
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Publication No.: US20120046500A1Publication Date: 2012-02-23
- Inventor: Scott Donald Barnicki , Jeffrey Scott Kanel , Kenneth Wayne Hampton, JR.
- Applicant: Scott Donald Barnicki , Jeffrey Scott Kanel , Kenneth Wayne Hampton, JR.
- Applicant Address: US TN Kingsport
- Assignee: EASTMAN CHEMICAL COMPANY
- Current Assignee: EASTMAN CHEMICAL COMPANY
- Current Assignee Address: US TN Kingsport
- Main IPC: C07C29/147
- IPC: C07C29/147

Abstract:
Disclosed is a process for the extractive recovery of a homogeneous ruthenium catalyst from the reaction product of the hydrogenation of glycolic acid, glycolate esters, and/or glycolic acid oligomers with an extractant comprising a hydrophobic solvent and an optional hydrophilic solvent. The ruthenium catalyst, which can include 1,1,1-tris(diaryl- or dialkylphosphinomethyl)alkane ligands, can be recovered from the hydrophobic extract phase by back extraction with a hydrophilic solvent and recycled to a process for the preparation of ethylene glycol by the hydrogenation of glycolic acid and glycolic acid derivatives.
Public/Granted literature
- US08466328B2 Method for recovery and recycle of ruthenium homogeneous catalysts Public/Granted day:2013-06-18
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