FIELD: metallurgy.
SUBSTANCE: invention relates to processing technique of waste sulfuric acid saturated by heavy metal with receiving of ferric sulfate. Waste sulfuric acid saturated by iron or sulfuric acid materials saturated by iron received from it are interacting to material which contains iron chloride and, non obligatory, other metal chlorides, by means of which it is received ferric sulfate (II). Formed at interaction of waste sulfuric acid with metal chloride hydrochloric acid is separated in gaseous form and/or in the form of aqueous hydrochloric acid. Waste sulfuric acid is supplied to manufacturing of titanium dioxide using sulphate process or from melting of copper, lead or zinc. Waste sulfuric acid is by-product of organic synthesis or etchant. Material, containing iron chloride is etchant or product received from treatment of etchant. Material, containing iron chloride is received from titanium dioxide manufacturing, using chloride process.
EFFECT: ecology improvement and expenditures reduction.
20 cl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PURIFICATION OF SOLUTIONS CONTAINING METAL | 1996 |
|
RU2153026C2 |
| METHOD FOR PRODUCING COMPLEX IRON-CONTAINING COAGULANT | 2022 |
|
RU2784031C1 |
| METHOD OF PRODUCING IRON-CONTAINING COAGULANT FROM PRODUCTION WASTES | 2018 |
|
RU2702572C1 |
| METHOD OF RECYCLING SPENT ETCHING SOLUTIONS CONTAINING IRON (II) SULPHATES AND CHLORIDES | 2010 |
|
RU2428522C1 |
| METHOD FOR PREPARING IRON-CONTAINING COAGULANT FOR WATER PURIFICATION | 2021 |
|
RU2759099C1 |
| METHOD OF PREPARING IRON-CONTAINING COAGULANT | 2010 |
|
RU2424195C1 |
| REDUCING AGENT FOR SOLUBLE CHROMATE, CONTAINED IN CEMENT | 2004 |
|
RU2347763C2 |
| PROCEDURE FOR PROCESSING TITANIUM-MAGNETITE CONCENTRATE | 2009 |
|
RU2394926C1 |
| METHOD OF PROCESSING OF IRON-CONTAINING MONAZITE CONCENTRATES | 2014 |
|
RU2576978C1 |
| METHOD OF REGENERATION OF METAL SULFATE-CONTAINING EXHAUSTED SULFURIC ACID | 1992 |
|
RU2098349C1 |
