发明名称 |
PROCESS FOR PREPARING CRYSTALLINE AMMONIUM SULFATE PRODUCT |
摘要 |
The invention relates to a process for preparing a crystalline ammonium sulfate product, which process comprises: a) subjecting in a crystallizer a feed solution of ammonium sulfate to crystallization to form a first slurry of ammonium sulfate crystals; b) subjecting the first slurry of ammonium sulfate crystals to a first size classification to yield a first coarse ammonium sulfate crystal fraction and a first fine ammonium sulfate crystal fraction; c) recycling at least part of the first fine ammonium sulfate crystal fraction to the feed solution of ammonium sulfate; and d) recovering a crystalline ammonium sulfate product from the first coarse ammonium sulfate crystal fraction, characterized in that: e) a second size classification is carried out on a second slurry of ammonium sulfate crystals to yield a second coarse ammonium sulfate crystal fraction and a second fine ammonium sulfate crystal fraction. |
申请公布号 |
US2015218008(A1) |
申请公布日期 |
2015.08.06 |
申请号 |
US201314425419 |
申请日期 |
2013.09.12 |
申请人 |
DSM IP ASSETS B.V. |
发明人 |
Ekkelenkamp Geert;Tinge Johan Thomas;Vonk Pieter |
分类号 |
C01C1/248;C01C1/24 |
主分类号 |
C01C1/248 |
代理机构 |
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代理人 |
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主权项 |
1. A process for preparing a crystalline ammonium sulfate product, which process comprises:
a) subjecting in a crystallizer a feed solution of ammonium sulfate to crystallization to form a first slurry of ammonium sulfate crystals; b) subjecting the first slurry of ammonium sulfate crystals to a first size classification to yield a first coarse ammonium sulfate crystal fraction and a first fine ammonium sulfate crystal fraction; c) recycling at least part of the first fine ammonium sulfate crystal fraction to the feed solution of ammonium sulfate; and d) recovering a crystalline ammonium sulfate product from the first coarse ammonium sulfate crystal fraction,characterized in that:
e) a second size classification is carried out on a second slurry of ammonium sulfate crystals to yield a second coarse ammonium sulfate crystal fraction and a second fine ammonium sulfate crystal fraction. |
地址 |
Heerlen NL |