PROCESS FOR MANUFACTURE OF PENTAERYTHRITOL DIPHOSPHITES

Title:

PROCESS FOR MANUFACTURE OF PENTAERYTHRITOL DIPHOSPHITES

Document Type and Number:

WIPO Patent Application WO2005060500

Kind Code:

A3

Abstract:

A method is disclosed for the production of pentaerythritol diphosphites of high spiro isomer content. The pentaerythritol diphosphites are produced via sequential transesterification of pentaerythritol with a monophosphite followed by a substituted phenol or other alcohol, wherein the transesterification reactions are carried out under controlled conditions of temperature and pressure. The unique reaction conditions result in intermediate and final pentaerythritol diphosphites of high spiro isomer content and high total yield of the diphosphites.

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Inventors:

LARKE CARROLL (US)

Application Number:

PCT/US2004/039200

Publication Date:

November 10, 2005

Filing Date:

November 23, 2004

Export Citation:

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Assignee:

DOVER CHEMICAL CORP (US)
LARKE CARROLL (US)

International Classes:

C07F9/6574; (IPC1-7): C07F9/6578

Foreign References:

US5438086A

1995-08-01

Other References: