发明名称 |
METHOD FOR TREATING FERROUS SULPHATE |
摘要 |
The invention concerns a method for treating ferrous sulphate for the preparation of ferrous sulphate hydrate usable for chromium reduction in cement manufacture. According to the invention, sulphuric acid containing ferrous sulphate obtained as a side product from titanium dioxide production and which contains at the most appr. 30 % by weight of sulphuric acid, is neutralized with a CaO-containing material, preferably cement, in an amount sufficient to give a pH-value to the end product which is 1.5 to 5, whereby the reaction temperature is allowed to increase to at the most 120 DEG C.
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申请公布号 |
WO9633133(A1) |
申请公布日期 |
1996.10.24 |
申请号 |
WO1996FI00198 |
申请日期 |
1996.04.12 |
申请人 |
FINNSEMENTTI OY;KEMIRA PIGMENTS OY;ERIKSSON, BO-ERIK;MATTILA, HARRI |
发明人 |
ERIKSSON, BO-ERIK;MATTILA, HARRI |
分类号 |
C01G49/14;C04B22/14;(IPC1-7):C01G49/14 |
主分类号 |
C01G49/14 |
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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