METHOD FOR SEPARATION AND COLLECTION OF DIALKYL TIN DIALKOXIDE

Title:

METHOD FOR SEPARATION AND COLLECTION OF DIALKYL TIN DIALKOXIDE

Document Type and Number:

WIPO Patent Application WO/2007/097388

Kind Code:

A1

Abstract:

An alkyl tin alkoxide catalyst composition used in the production of a carbonate ester has such a problem that the composition undergoes a thermal modification by heating during the production process and converted into an alkyl tin alkoxide catalyst composition which contains a high-boiling-point inactive component and an active component and therefore cannot be separated by distillation. Then, disclosed is a method for separating and collecting the active component from the alkyl tin alkoxide catalyst composition as a useful dialkyl tin dialkoxide. The method comprises the steps of: reacting an alkyl tin alkoxide catalyst composition that contains a high-boiling-point inactive component and an active component and cannot be separated by distillation with an alcohol and/or a carbonate ester to yield a reaction solution containing a produced derived from the active component; and distilling the reaction solution to separate and collect a dialkyl tin dialkoxide from the product derived from the active component.

Inventors:

BIJANTO BUDIANTO (JP)
MIYAKE NOBUHISA (JP)

Application Number:

PCT/JP2007/053254

Publication Date:

August 30, 2007

Filing Date:

February 22, 2007

Export Citation:

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Assignee:

ASAHI KASEI CHEMICALS CORP (JP)
BIJANTO BUDIANTO (JP)
MIYAKE NOBUHISA (JP)

International Classes:

B01J38/00; B01J31/12; B01J31/40; C07C68/00

Domestic Patent References:

WO2004014840A1

2004-02-19

Foreign References:

JP2002371084A	2002-12-26
JP2006159090A	2006-06-22
JP2006176411A	2006-07-06
JP2006176412A	2006-07-06

Other References: