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Title:
METHOD FOR MANUFACTURING TOLYLENE DIISOCYANATE
Document Type and Number:
WIPO Patent Application WO/2012/157366
Kind Code:
A1
Abstract:
A method for manufacturing tolylene diisocyanate comprises a mixing step, a carbamate manufacturing step, and a pyrolysis step. In the mixing step, a first diaminotoluene containing 2,4- and 2,6-diaminotoluene in a first isomeric ratio is mixed with a second diaminotoluene containing 2,4- and/or 2,6-diaminotoluene in a second isomeric ratio, and mixed diaminotoluene is prepared. In the carbamate manufacturing step, a reaction is brought about between the mixed diaminotoluene prepared in the mixing step, urea and/or N-unsubstituted carbamate, and an alcohol, whereby tolylene dicarbamate is produced. In the pyrolysis step, the tolylene dicarbamate is pyrolyzed.

Inventors:
TAKAMATSU, Koji (INC. 580-32, Nagaura, Sodegaura-sh, Chiba 65, 〒2990265, JP)
高松 孝二 (〒65 千葉県袖ヶ浦市長浦580番地32 三井化学株式会社内 Chiba, 〒2990265, JP)
KOSUMI, Kazuhiro (INC. 30, Asamutacho, Omuta-sh, Fukuoka 10, 〒8368610, JP)
小角 和広 (〒10 福岡県大牟田市浅牟田町30 三井化学株式会社内 Fukuoka, 〒8368610, JP)
Application Number:
JP2012/059491
Publication Date:
November 22, 2012
Filing Date:
April 06, 2012
Export Citation:
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Assignee:
MITSUI CHEMICALS, INC. (5-2 Higashi-Shimbashi 1-chome, Minato-ku Tokyo, 17, 〒1057117, JP)
三井化学株式会社 (〒17 東京都港区東新橋一丁目5番2号 Tokyo, 〒1057117, JP)
TAKAMATSU, Koji (INC. 580-32, Nagaura, Sodegaura-sh, Chiba 65, 〒2990265, JP)
高松 孝二 (〒65 千葉県袖ヶ浦市長浦580番地32 三井化学株式会社内 Chiba, 〒2990265, JP)
KOSUMI, Kazuhiro (INC. 30, Asamutacho, Omuta-sh, Fukuoka 10, 〒8368610, JP)
International Classes:
C07C263/04; C07C265/14
Domestic Patent References:
WO2011078000A1
Foreign References:
JPS5665858A
JPH02101057A
JPH10507738A
JPH10279539A
JPH09151270A
JPS5665858A
Other References:
See also references of EP 2711357A4
Attorney, Agent or Firm:
OKAMOTO, Hiroyuki (Central Shin-Osaka Building 3rd Floor 5-36, Miyahara 4-chome, Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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Claims: