| 摘要 |
A lead compound is prepared by treating red lead with dilute nitric acid and interrupting the treatment before lead peroxide is formed to any considerable extent. In an example, 1000 grams of red lead are treated with 333 c.c. water and 600 c.c. of nitric acid S.G. 1.4 diluted with 840 c.c. water. The treatment is interrupted after fifty minutes and the brown residue washed. |
