发明名称 |
METHOD FOR PRODUCING MDI, ESPECIALLY 2,4'-MDI |
摘要 |
The invention relates to a method for producing MD1, comprising the following steps: A) aniline and formaldehyde are made to react in the presence of an acid to form methylene(diphenyldiamene) and polymethylene polyphenylene polyamine, the mol ratio of acid to amine being a maximum of 0.2; b) the mixture obtained in step A) is reacted with phosgene to form methylene (diphenyldiisocyanate) and polymethylene polyphenylene polyisocyanate; C) the mixture obtained in step B) is separated into monomer MDI and polymer MDI; and D) the monomer MDI obtained in step C) is separated from 2,4'- MDI.
|
申请公布号 |
KR20030081497(A) |
申请公布日期 |
2003.10.17 |
申请号 |
KR20037011640 |
申请日期 |
2003.09.05 |
申请人 |
BASF AG |
发明人 |
REIF MARTIN;BRUCHMANN BERND;POHL SIEGMUND;BETTENDORF CARL;PLAUMANN HEINZ;THIELE KAI |
分类号 |
C07C263/10;C07B61/00;C07C263/20;C07C265/14;C08G18/76 |
主分类号 |
C07C263/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|