| 发明名称 |
Preparation of pigment grade chromium oxide. |
| 摘要 |
A process for the preparation of pigment grade chromium oxide comprising calcining non-pigment grade chromium oxide in the presence of at least about 1.0 weight percent sodium sulfate, washing the calcined mixture to remove the sodium sulfate and recovering the pigment grade oxide thus produced.
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| 申请公布号 |
EP0068787(A1) |
申请公布日期 |
1983.01.05 |
| 申请号 |
EP19820303233 |
申请日期 |
1982.06.22 |
| 申请人 |
PFIZER INC. |
发明人 |
RAO, VELLIYUR-NOTT PADMANABHA |
| 分类号 |
C01G37/02;C09C1/00;C09C1/34;(IPC1-7):C09C1/34 |
主分类号 |
C01G37/02 |
| 代理机构 |
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代理人 |
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