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
WO9209585(A1)
申请公布日期
1992.06.11
申请号
WO1991NL00240
申请日期
1991.11.28
申请人
DSM N.V.
发明人
VAN DE MOESDIJK, CORNELIS, GERARDUS, MARIA;JANSSEN, HENDRIK, JAN;SCHROIJEN, JOSEPHUS, CORNELUS
