发明名称 |
PROCESS FOR PRODUCING MELQMINE FROM UREA |
摘要 |
PCT No. PCT/NL91/00240 Sec. 371 Date Jun. 1, 1993 Sec. 102(e) Date Jun. 1, 1993 PCT Filed Nov. 28, 1991 PCT Pub. No. WO92/09585 PCT Pub. Date Jun. 11, 1992.The invention relates to a selective removal of impurities from the gas stream leaving a melamine synthesis reactor in the preparation of melamine from urea by means of a treatment with steam at elevated temperature in the presence of a catalyst which is shape-selective. For instance a molecular sieve is chosen. |
申请公布号 |
HUT64046(A) |
申请公布日期 |
1993.11.29 |
申请号 |
HUP9301591 |
申请日期 |
1991.11.28 |
申请人 |
DSM N.V.,NL |
发明人 |
VAN DE MOESDIJK,CORNELIUS GERARDUS MARIA,NL;JANSSEN,HENDRIK JAN,NL;SCHROIJEN,JOSEPHUS CORNELIUS,NL |
分类号 |
C07D251/60;C07D251/62 |
主分类号 |
C07D251/60 |
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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