发明名称 |
VERFAHREN ZUR HERSTELLUNG VON ISOPHORONDIISOCYANAT AUS ISOPHORON-DICARBAMIDSAEUREESTERN DURCH VERWENDUNG VON HOCH-SELEKTIVEN SN02- ODER CU0-KATALYSATOREN. |
摘要 |
Isophorone diisocyanate, 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (IPDI) is prepared by liquid phase thermolysis of the corresponding bis-carbamic acid ester into the corresponding isocyanate and alcohol, respectively, in the presence of a highly selective metal oxide catalyst (SnO2 and/or CuO). Typically, the cracking reaction is carried out at a temperature from 225 DEG to 350 DEG C, at a pressure of from 20 to 50 mmHg. These catalysts give high IPDI yields with high conversions of the carbamic acid esters. |
申请公布号 |
AT61570(T) |
申请公布日期 |
1991.03.15 |
申请号 |
AT19870104412T |
申请日期 |
1987.03.25 |
申请人 |
AMERICAN CYANAMID COMPANY |
发明人 |
LUH, YUHSHI;FORGIONE, PETER SALVATORE |
分类号 |
C07B61/00;B01J23/00;B01J23/14;B01J23/72;C07C67/00;C07C241/00;C07C263/04;C07C265/04;C07C265/10;C07C265/14;(IPC1-7):C07C265/10 |
主分类号 |
C07B61/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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