FIELD: chemistry.
SUBSTANCE: present invention pertains to a reducing agent for soluble chromate, contained in cement. The reducing agent, containing iron (II) sulphate, comprises green salt and a precipitate, containing iron (II) sulphate. The precipitate, containing iron (II) sulphate is obtained using a method involving concentration of black sulphuric acid, containing iron (II) sulphate, and separation of sulphuric acid from the obtained precipitate. The invention is developed in secondary claims.
EFFECT: increased efficiency of reducing soluble chromate, contained in cement.
25 cl, 12 ex, 7 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| HYDRAULIC BINDING AGENT, CHROMATE REDUCING AGENT AND ITS USING | 2004 |
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