PROCESS FOR THE PRODUCTION OF ISOCYANATES, PREFERABLY DIISOCYANATES AND POLYISOCYANATES WITH SOLVENT RECIRCULATION

Title:

PROCESS FOR THE PRODUCTION OF ISOCYANATES, PREFERABLY DIISOCYANATES AND POLYISOCYANATES WITH SOLVENT RECIRCULATION

Document Type and Number:

WIPO Patent Application WO/2010/149544

Kind Code:

A3

Abstract:

The present invention relates to a process for the production of isocyanates, preferably diisocyanates and polyisocyanates of the diphenylmethane series (MDI), by reacting an amine with phosgene in the liquid phase or in the gas phase to form the corresponding isocyanates, subsequent removal of the solvent in at least two steps to obtain at least two solvent streams, individual treatment of the at least two solvent streams, and recirculation of at least a portion of the solvent streams.

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Inventors:

SCHELLING HEINER (DE)
PENZEL ULRICH (DE)
STROEFER ECKHARD (DE)
EIERMANN MATTHIAS (DE)
SPEIER JON S (US)
THIELE KAI (BE)
BOCK MICHAEL (DE)

Application Number:

PCT/EP2010/058421

Publication Date:

March 17, 2011

Filing Date:

June 16, 2010

Export Citation:

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Assignee:

BASF SE (DE)
SCHELLING HEINER (DE)
PENZEL ULRICH (DE)
STROEFER ECKHARD (DE)
EIERMANN MATTHIAS (DE)
SPEIER JON S (US)
THIELE KAI (BE)
BOCK MICHAEL (DE)

International Classes:

C07C265/04; C07C263/10; C07C265/12

Foreign References:

US20050020797A1	2005-01-27
US6683204B1	2004-01-27

Attorney, Agent or Firm:

SCHUCK, Alexander (Eastsite OneSeckenheimer Landstraße 4, Mannheim, DE)

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