POLYACRYLAMIDE-BASED FLOCCULANT Russian patent published in 2008 - IPC C02F1/56 C08L33/26 

FIELD: chemistry.

SUBSTANCE: invention concerns obtaining of efficient flocculants which can be applied in condensation and clearing of industrial suspensions, and in mineral treatment, particularly in flotation waste clarification in the process of coal benefication. In the first variant the flocculant contains, mass %: polyacrylamide 0.5-99.0, modifying agent 0.15-0.3, the rest is water. Modifying agent is a mix of propylene glycol and ethyl cellosolve in the ratio of 1:2. In the second variant the flocculant contains, mass %: polyacrylamide 0.5-99.0, modifying agent 0.25-0.35, the rest is water. Modifying agent is a mix of propylene glycol and propylenechlorohydrine in the ratio of 1:2. In the third variant the flocculant contains, mass %: polyacrylamide 0.5-99.0, modifying agent 0.1-0.2, the rest is water. Modifying agent is a mix of propylene glycol, ethyl cellosolve and propylenechlorohydrine in the ratio of 1:2:1.

EFFECT: improved flocculant efficiency due to faster precipitation of limestone suspension and higher clarification degree.

4 cl, 3 tbl, 3 ex