Title:
APPARATUS FOR POLYISOCYANATE PRODUCTION AND APPARATUS FOR GAS TREATMENT
Document Type and Number:
WIPO Patent Application WO/2006/109416
Kind Code:
A1
Abstract:
An apparatus for polyisocyanate production in which chlorine can be stably produced from hydrogen chloride generated as a by-product, carbonyl chloride can be stably reacted with a polyamine, and the by-product hydrogen chloride gas can be efficiently treated. A hydrogen chloride gas control part (32) controls a flow control valve (23), whereby the amount of hydrogen chloride to be fed to a hydrogen chloride oxidation tank (6) through a second hydrogen chloride gas connection line (11) from a hydrogen chloride purification column (4) is kept constant. The hydrogen chloride gas control part (32) further controls a pressure control valve (22) based on the internal pressure of the hydrogen chloride purification column (4) inputted from a pressure sensor (25) to discharge hydrogen chloride gas to a hydrogen chloride absorption column (5) through a first hydrogen chloride gas connection line (10) from the hydrogen chloride purification column (4) so that the internal pressure of the hydrogen chloride purification column (4) is constant.
Inventors:
SASAKI MASAAKI (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
NAITO TAKAO (JP)
TERADA KOUICHIROU (JP)
YAMAGUCHI TAKASHI (JP)
SAEKI TAKUYA (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
NAITO TAKAO (JP)
TERADA KOUICHIROU (JP)
YAMAGUCHI TAKASHI (JP)
SAEKI TAKUYA (JP)
Application Number:
PCT/JP2006/305344
Publication Date:
October 19, 2006
Filing Date:
March 17, 2006
Export Citation:
Assignee:
MITSUI CHEMICALS POLYURETHANES (JP)
SASAKI MASAAKI (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
NAITO TAKAO (JP)
TERADA KOUICHIROU (JP)
YAMAGUCHI TAKASHI (JP)
SAEKI TAKUYA (JP)
SASAKI MASAAKI (JP)
TAKAHASHI HIROFUMI (JP)
MAEBA KOUJI (JP)
NAITO TAKAO (JP)
TERADA KOUICHIROU (JP)
YAMAGUCHI TAKASHI (JP)
SAEKI TAKUYA (JP)
International Classes:
C07C263/10; C01B7/04; C01B7/07; C07C263/18; C07C265/14
Domestic Patent References:
| WO2004014845A1 | 2004-02-19 | |||
| WO2004037718A2 | 2004-05-06 | |||
| WO2004056758A1 | 2004-07-08 |
Foreign References:
| JPS5547117A | 1980-04-03 | |||
| JP2002136828A | 2002-05-14 | |||
| JPH06319946A | 1994-11-22 | |||
| JP2001516333A | 2001-09-25 |
Other References:
See also references of EP 1867631A4
Attorney, Agent or Firm:
Okamoto, Hiroyuki c/o AI ASSOCIATION OF PATENT AND TRADEMARK ATTORNEYS (Sun Mullion NBF Tower 21st Floor 6-12,
Minamihommachi 2-chome, Chuo-k, Osaka-shi Osaka 54, JP)
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