发明名称 |
CONTINUOUS PROCESS FOR MAKING GRANULES OF SODIUM PERBORATE |
摘要 |
<p>Spray-drying of a solution containing hydrogen peroxide and sodium metaborate is known per se; these products are very fine and amorphous, and they show an unsatisfactory storage stability. …<??>According to the invention, these disadvantages are eliminated, if the primary particles obtained by spray-drying are, immediately after they have left the drying zone, fed to a granulator device and granulated in the presence of free water and/or water of crystallisation of the perborate and, if necessary, the granules are dried. The generally amorphous primary particles are converted into granules having an at least partially crystalline structure and a significantly improved storage stability. Advantageously, the process is carried out in a spray drier with integrated fluidised bed or in a compacting granulator device. The process is suitable for producing perborate granules with more than 10 % by weight, especially perborate monohydrate granules with 14 - 16 % by weight, of active oxygen.</p> |
申请公布号 |
GR3002453(T3) |
申请公布日期 |
1992.12.30 |
申请号 |
GR19910401078T |
申请日期 |
1991.08.08 |
申请人 |
DEGUSSA AKTIENGESELLSCHAFT |
发明人 |
BERTSCH-FRANK, BIRGIT, DR.;MUELLER, KLAUS, DR.;LIESER, THOMAS, DR. |
分类号 |
B01J2/00;C01B15/12;(IPC1-7):B01J2/00 |
主分类号 |
B01J2/00 |
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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