发明名称 |
Preparation of granular sodium tripolyphosphate products |
摘要 |
Dense rotary dried sodium tripolyphosphate (STPP) particles having a bulk density of at least 0.9 g/cc and a particle size distribution of 0 to 85% by weight +20 mesh, 15 to 100% by weight -20 +100 mesh and 0 to 20% by weight -100 mesh are moisturized by adding a sufficient amount of water to produce a material containing on the average between about 10% and about 30% by weight moisture. The moisturized material is calcined to a temperature within the range of from about 300 DEG to about 600 DEG C., to produce a granular STPP product having low friability, high absorptivity and a bulk density within the range of from about 0.65 to about 0.87 g/cc.
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申请公布号 |
US4255274(A) |
申请公布日期 |
1981.03.10 |
申请号 |
US19790000619 |
申请日期 |
1979.01.02 |
申请人 |
FMC CORPORATION |
发明人 |
HENSLER, PAUL L.;CHURCH, DELMAR F.;BEGER, ROBERT W. |
分类号 |
C01B25/41;(IPC1-7):C01B15/16;C11D7/16 |
主分类号 |
C01B25/41 |
代理机构 |
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