| abstract |
The invention relates to a hybrid coagulant and a preparation method thereof. The coagulant is PMeS-PDMDAAC obtained by copolymerization and hybridization of polysilicate and a cationic monomer, wherein the cationic monomer is dimethyldiallyl ammonium chloride and/or methacryloyloxyethyltrimethylammonium chloride, the mass ratio of the polysilicate to the cationic monomer is 1:2-5. The invention also discloses a preparation method of a hybrid coagulant, which specifically includes the following steps: S1) after hydrolyzing and activating sodium silicate, react with metal sulfate to prepare polysilicate; S2) preparing the prepared polysilicon The acid salt is added to the cationic monomer, then the initiator ammonium persulfate is added, and the hybrid coagulant is obtained by reacting at 45-70 °C for 3-6 hours. The coagulant disclosed by the invention has better coagulation effect, obvious effect on oil removal and suspended solid flocculation removal of oilfield sewage, and the preparation method is simple and easy to operate. |