Title:
PURIFICATION METHOD FOR DIISOCYANATE
Document Type and Number:
Japanese Patent JP2013063916
Kind Code:
A
Abstract:
To provide a purification method for diisocyanate which can purify diisocyanate at a high yield from a mixture containing the diisocyanate and alcohol.
Using a purification apparatus 3 having a rectifying tower 8, and a condensation system 10 connected to the downstream side of the rectifying tower 8 and equipped with a first condenser 12 and a second condenser 22 which are connected to each other in series, a mixture containing diisocyanate and alcohol is purified in the rectifying tower 8 and the condensation system 10 in order. Diisocyanate can be obtained at an excellent yield by this diisocyanate purification method.
Inventors:
TAKAMATSU KOJI
KOKADO KAZUHIRO
FUKUDA TAKESHI
SASAKI SUKEAKI
KOKADO KAZUHIRO
FUKUDA TAKESHI
SASAKI SUKEAKI
Application Number:
JP2011202069A
Publication Date:
April 11, 2013
Filing Date:
September 15, 2011
Export Citation:
Assignee:
MITSUI CHEMICALS INC
International Classes:
C07C263/20; C07C265/14
Domestic Patent References:
| JPS59108754A | 1984-06-23 | |||
| JP2005526744A | 2005-09-08 | |||
| JPH02101057A | 1990-04-12 | |||
| JP2005068147A | 2005-03-17 | |||
| JPS6485956A | 1989-03-30 | |||
| JPH04235155A | 1992-08-24 | |||
| JPS59108754A | 1984-06-23 | |||
| JP2005526744A | 2005-09-08 | |||
| JPH02101057A | 1990-04-12 | |||
| JP2005068147A | 2005-03-17 |
Attorney, Agent or Firm:
Hiroyuki Okamoto
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