PROCESS FOR PRODUCTION OF POLYISOCYANATE AND EQUIPMENT FOR PRODUCTION THEREOF

Title:

PROCESS FOR PRODUCTION OF POLYISOCYANATE AND EQUIPMENT FOR PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2006/095761

Kind Code:

A1

Abstract:

The invention provides a process for the production of polyisocyanate which permits effective utilization of hydrogen chloride formed in the production of polyisocyanate as a by-product and reduction in environment load, and equipment for realizing the process. Carbonyl chloride is formed in a reaction tank (2) for the production of carbonyl chloride by reacting chlorine with carbon monoxide, and then reacted with polyamine in an isocyanation tank (3) to form a polyisocyanate. Hydrogen chloride gas formed as a by-product in the tank (3) is purified in a hydrogen chloride purification column (4) and then oxidized in a hydrogen chloride oxidation tank (6) into chlorine. This chlorine is fed into the tank (2) through a chlorine recycling line (8) and reacted with carbon monoxide to form carbonyl chloride.

Inventors:

SASAKI MASAAKI (JP)
NAITO TAKAO (JP)
HIRATA FUMIAKI (JP)
SARUWATARI MASATO (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
IMAIZUMI TSUGIO (JP)
SAEKI TAKUYA (JP)
YAMAGUCHI TAKASHI (JP)
TERADA KOUICHIROU (JP)

Application Number:

PCT/JP2006/304447

Publication Date:

September 14, 2006

Filing Date:

March 08, 2006

Export Citation:

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Assignee:

MITSUI CHEMICALS POLYURETHANES (JP)
SASAKI MASAAKI (JP)
NAITO TAKAO (JP)
HIRATA FUMIAKI (JP)
SARUWATARI MASATO (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
IMAIZUMI TSUGIO (JP)
SAEKI TAKUYA (JP)
YAMAGUCHI TAKASHI (JP)
TERADA KOUICHIROU (JP)

International Classes:

C07C263/10; C07C265/14

Domestic Patent References:

WO2004014845A1	2004-02-19
WO2004037718A2	2004-05-06

Foreign References:

JP2001516333A	2001-09-25
JPH0952873A	1997-02-25

Other References: