Title:
メチレンジ(フェニルイソシアネート)の製造方法
Document Type and Number:
Japanese Patent JP2014500876
Kind Code:
A
Abstract:
The invention relates to a process for preparing methylene diphenyl diisocyanate, comprising (a) the phosgenation of di- and/or polycyclic methylene diphenyl diamine, (b) the separation of the crude methylene diphenyl diisocyanate obtained into di- and polycyclic isomers, (c) the purification and/or separation of the mixture of bicyclic isomers of methylene diphenyl diisocyanate obtained, and (d) the storage of the mixtures obtained in step (c) or in step (b), wherein a portion of the stored mixtures is used again by means of recycling in at least one of steps (b) and (c).
Inventors:
Bock michael
Thiele, Chi
Schelling, Heiner
Thiele, Chi
Schelling, Heiner
Application Number:
JP2013539212A
Publication Date:
January 16, 2014
Filing Date:
November 14, 2011
Export Citation:
Assignee:
BASF SE
International Classes:
C07C263/10; C07C263/20; C07C265/14
Domestic Patent References:
| JP2007137886A | 2007-06-07 | |||
| JP2005041874A | 2005-02-17 | |||
| JP2005225879A | 2005-08-25 | |||
| JP2007137886A | 2007-06-07 | |||
| JP2005041874A | 2005-02-17 | |||
| JP2005225879A | 2005-08-25 |
Foreign References:
| US4465638A | 1984-08-14 | |||
| US4465638A | 1984-08-14 |
Attorney, Agent or Firm:
Satoshi Eto