发明名称 |
Method of preparation of talcum product with high purity degree |
摘要 |
The method which is the subject of protection is characteristic by the fact that firstly is made the suspension consisting of 10 to 20 mass % of mineral talc and 80 to 90 mass % of water; resulting suspension is homogenized and thereafter is heated to the temperature 50° to 70° C. To heated suspension is then added 37% hydrochloric acid in the amount of 1 to 6 mass % under continuous stirring. After reaching pH 3 to 5 and increasing the temperature up to 85° C., to the suspension is then added concentrated sulphuric acid in the amount of 1 to 5 mass %. The suspension is further maintained at the temperature up to 90° C., then it is chilled to the ambient temperature and thereafter is separated the sediment which is finally dried at the temperature 140° to 160° C. after washing with water and reaching pH 5 to 6. |
申请公布号 |
US8142752(B2) |
申请公布日期 |
2012.03.27 |
申请号 |
US20080528441 |
申请日期 |
2008.02.26 |
申请人 |
KOVANDA IVAN;BENKOVSKY LEO;POBIS KAROL;NEMEC JIRI;ONDRASIKOVA JANA |
发明人 |
KOVANDA IVAN;BENKOVSKY LEO;POBIS KAROL;NEMEC JIRI;ONDRASIKOVA JANA |
分类号 |
C01B33/24 |
主分类号 |
C01B33/24 |
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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