CARBAMATE PRODUCTION METHOD, ISOCYANATE PRODUCTION METHOD, CARBAMATE PRODUCTION DEVICE AND ISOCYANATE PRODUCTION DEVICE

Title:

CARBAMATE PRODUCTION METHOD, ISOCYANATE PRODUCTION METHOD, CARBAMATE PRODUCTION DEVICE AND ISOCYANATE PRODUCTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2011/158598

Kind Code:

A1

Abstract:

The disclosed carbamate production method is provided with a urea-producing process, a carbamation process, an ammonia-separating process wherein gas is absorbed in water in the presence of carbonate salt to form water with absorbed gas and to separate ammonia, an aqueous alcohol solution-separating process that separates an aqueous alcohol solution from the water with absorbed gas, an ammonia/carbonic acid-separating process wherein carbonic acid gas is separated from the aqueous ammonia solution in the water with absorbed gas from which the aqueous alcohol solution was separated, and an aqueous ammonia solution re-using process that mixes the aqueous ammonia solution and carbonate salt with water for use in producing the water for gas absorption.

Inventors:

TAKAMATSU KOJI (JP)
KATO SATOSHI (JP)
FUKUDA TAKESHI (JP)
NAKANO TETSUYA (JP)
SASAKI MASAAKI (JP)

Application Number:

PCT/JP2011/061515

Publication Date:

December 22, 2011

Filing Date:

May 19, 2011

Export Citation:

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Assignee:

MITSUI CHEMICALS INC (JP)
TAKAMATSU KOJI (JP)
KATO SATOSHI (JP)
FUKUDA TAKESHI (JP)
NAKANO TETSUYA (JP)
SASAKI MASAAKI (JP)

International Classes:

C07C269/04; C07C263/04; C07C265/00; C07C271/06

Domestic Patent References:

WO2011021257A1	2011-02-24
WO2010116871A1	2010-10-14

Foreign References:

JPH08277255A	1996-10-22
JPH07157463A	1995-06-20

Other References: