CATALYST RECOVERY PROCESS

Title:

CATALYST RECOVERY PROCESS

Document Type and Number:

WIPO Patent Application WO/2011/151519

Kind Code:

A3

Abstract:

The present invention relates to a method for recovering lanthanoid catalyst from the preparation of aspartic acid diethoxy succinate comprising contacting a carbonate source with a solution containing lanthanoid ions derived from said preparation and a chelating agent different from aspartic acid diethoxy succinate to precipitate lanthanoid carbonate followed by separating the precipitated lanthanoid carbonate from the solution.

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Inventors:

AKSELA REIJO (FI)
RISSANEN JUSSI (FI)

Application Number:

PCT/FI2011/050506

Publication Date:

March 15, 2012

Filing Date:

May 31, 2011

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Assignee:

KEMIRA OYJ (FI)
AKSELA REIJO (FI)
RISSANEN JUSSI (FI)

International Classes:

B01J23/10; C07C227/10; C07C229/24

Domestic Patent References:

WO1999046234A1	1999-09-16
WO1997045396A1	1997-12-04

Attorney, Agent or Firm:

BERGGREN OY AB (P.O. Box 16, Helsinki, FI)

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