FIELD: inorganic chemistry, chemical technology.
SUBSTANCE: invention relates to technology of inorganic substances, in particular, to a method for preparing aluminum sulfate-base coagulant used in processes of water preparing and treatment of sewage of different origin. Method for preparing modified aluminum sulfate involves feeding sulfuric acid to aluminum hydroxide suspension with heating the reaction mixture, addition of a primer, keeping the reaction mixture at temperature 105-120°C and the following crystallization of a prepared melt. After feeding all amount of sulfuric acid to the reaction mixture a primer is added as carbon aqueous suspension of fraction less 0.5 mm and in the ratio solid : liquid = 1:(2.0-4.0) wherein the amount of added carbon in the modified aluminum sulfate is 2-5 weight%. Invention provides preparing modified aluminum sulfate in a solid state that possesses the enhanced coagulating capacity.
EFFECT: improved preparing method, improved properties of product.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCTION OF ALUMO-IRON COAGULANT | 2004 |
|
RU2264352C1 |
| METHOD OF SYNTHESIS OF ALUMINIUM SULFATE CRYSTAL HYDRATE | 1998 |
|
RU2152356C1 |
| METHOD FOR PRODUCING COAGULANT BASED ON ALUMINIUM POLYOXYSULFATE, COAGULANT PRODUCED BY SAID METHOD | 2015 |
|
RU2617155C1 |
| METHOD OF PRODUCTION OF ALUMINUM SULFATE | 2002 |
|
RU2214365C1 |
| METHOD OF PREPARING COAGULANT BASED ON MIXED ALUMINIUM SALTS | 2000 |
|
RU2177908C2 |
| METHOD OF PROCESSING SULFURIC ACID TO ALUMINIUM SULFATE | 1993 |
|
RU2094364C1 |
| METHOD OF PRODUCING COMPLEX ALUMINIUM-CONTAINING COAGULANT | 2019 |
|
RU2720790C1 |
| METHOD FOR PREPARING COAGULANT | 0 |
|
SU1006377A1 |
| METHOD OF COMPLEX PROCESSING OF SERPENTINE-CHROMITE CRUDE ORE | 2013 |
|
RU2535254C1 |
| METHOD OF PRODUCING ALUMINUM HYDROXOCHLOROSULPHATE | 2019 |
|
RU2700070C1 |
