发明名称 |
Process for producing xylylene diisocyanate. |
摘要 |
Xylylen diisocyanate is produced in higher space-time yield with higher selectivity by thermal decomposition of xylylene dicarbamate as an urethane compound, i.e. by subjecting the urethane compound to reactive distillation with a thermal decomposition catalyst of at least one of metals selected from antimony and tin or their compounds in the presence of an inert solvent having a higher boiling point than that of the resulting xylylene diisocyanate under reduced pressure of 1 to 500 mmHg and at 150 DEG to 350 DEG C and then subjecting the resulting reaction products as distillates to partial condensation outside the reactive distillation system, thereby separately recovering the resulting alcohol and xylylene diisocyanate. |
申请公布号 |
EP0492145(A2) |
申请公布日期 |
1992.07.01 |
申请号 |
EP19910120060 |
申请日期 |
1991.11.25 |
申请人 |
MITSUBISHI GAS CHEMICAL COMPANY, INC. |
发明人 |
OKAWA, TAKASHI NIIGATA KENKYUSHO;SATO, YOSHIFUMI NIIGATA KENKYUSHO;IGARASHI, HIDEO NIIGATA KENKYUSHO;SUZUKI, SYUNSUKE NIIGATA KENKYUSHO |
分类号 |
B01J23/14;B01J23/18;B01J27/053;B01J27/08;B01J27/10;B01J27/135;B01J27/18;B01J31/04;C07B61/00;C07C263/04;C07C265/14 |
主分类号 |
B01J23/14 |
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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