| 摘要 |
<p>There is produced crystalline zeolite powder of Type A having an average particle diameter of 7 to 8.5 mu by introducing the components waterglass and alkali aluminate liquor under defined conditions simultaneously into a receiver containing water, stirring, subsequently first adding more alkali aluminate liquor and then more waterglass solution. The thus obtained crystalline zeolite powder is used as a phosphate substitute in washing agents.</p> |
