发明名称 |
METHOD OF TREATMENT OF TALC |
摘要 |
The way of talc treatment consists in the mixing-up 74 up to 89 weight % of water, 10 up to 20 weight % of talc and 1 up to 6 weight % of hydrochloric acid and the resulting substance is heated at constant stirring in 0.5 up to 6 hours to the temperature 40 DEG C up to 60 DEG C and it is maintained at this temperature during 1 up to 6 hours. Out of the reaction mixture there is afterwards separated the sediment and following the adjustment of its acidity to the pH value 5 up to 8 it is mixed with water and sulphuric acid in the ratio 10 up to 20 volume % of sediment, 74 up to 89 volume % of water and 1 up to 6 volume % of sulphuric acid in dependence with the laboratory temperature, and at constant stirring is the reaction mixture heated during 0.5 hour up to 6 hours to the temperature 75 DEG C up to 125 DEG C and it is maintained at this temperature until the time when there is reached a quasi unchangeable value of the iron content in the reaction mixture, and then the sediment is separated, its acidity is adjusted to the pH value 5 up to 8 and subsequently it is dried and sterilized at the temperature 160 DEG C up to 250 DEG C during two up to four hours. |
申请公布号 |
WO9520542(A1) |
申请公布日期 |
1995.08.03 |
申请号 |
WO1995SK00001 |
申请日期 |
1995.01.27 |
申请人 |
TANO CONTO;KOVANDA, IVAN;POBIS, KAROL;SMIDAK, JOZEF;SMATANA, JURAJ |
发明人 |
KOVANDA, IVAN;POBIS, KAROL;SMIDAK, JOZEF;SMATANA, JURAJ |
分类号 |
A61K9/00;A61K47/02;C01B33/22;C09C1/28 |
主分类号 |
A61K9/00 |
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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