发明名称 |
SOLUBLE ACID POLYPHOSPHATES AND DEVICE FOR THEIR PRODUCTION |
摘要 |
The invention relates to a method for producing soluble acid polyphosphates with an Na/P ratio of 0.3 to 0.6, a P2O5 content of over 77 %wt., a Na2O content of under 20 % and a residual water content of 3-10 %. The invention is characterized in that an aqueous phosphate solution is dried in order to for m chain-like polyphosphates with an average chain length of 10 to 30, and then fused for 30-180 minutes at temperatures of 400-600 ~C. The fusion is cooled , forming a vitreous product. During fusion, steam pressure of 0.1 to 0.5 bar is maintained in the atmosphere in contact with the fusion. The invention also relates to the polyphosphates produced by this method and to their use.</SDO AB>
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申请公布号 |
CA2295687(C) |
申请公布日期 |
2003.11.18 |
申请号 |
CA19982295687 |
申请日期 |
1998.06.23 |
申请人 |
BK GIULINI CHEMIE GMBH UND CO. OHG |
发明人 |
KLEIN, THOMAS;STAFFEL, THOMAS;MAURER, ALEXANDER;WAHL, FRIEDRICH |
分类号 |
A23C19/082;C01B25/41;(IPC1-7):C01B25/41 |
主分类号 |
A23C19/082 |
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地址 |
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