Invention Grant
- Patent Title: Method for recovery and recycle of ruthenium homogeneous catalysts
- Patent Title (中): 钌均相催化剂的回收和再循环方法
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Application No.: US13208399Application Date: 2011-08-12
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Publication No.: US08829248B2Publication Date: 2014-09-09
- Inventor: Scott Donald Barnicki , Jeffrey Scott Kanel , Kenneth Wayne Hampton, Jr. , Eduardo Gallas Cervo
- Applicant: Scott Donald Barnicki , Jeffrey Scott Kanel , Kenneth Wayne Hampton, Jr. , Eduardo Gallas Cervo
- Applicant Address: US TN Kingsport
- Assignee: Eastman Chemical Company
- Current Assignee: Eastman Chemical Company
- Current Assignee Address: US TN Kingsport
- Agent Jennifer R. Knight
- Main IPC: C07C29/149
- IPC: C07C29/149 ; C07C29/80 ; B01J31/40 ; C07C29/86 ; B01J31/24

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
- US20120046481A1 METHOD FOR RECOVERY AND RECYCLE OF RUTHENIUM HOMOGENEOUS CATALYSTS Public/Granted day:2012-02-23
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