| abstract |
A method for preparing superabsorbent particles by polymerizing a monomer solution or suspension, comprising: cooling the pre-neutralized monomer and partially recirculating it to the pre-neutralization while continuously pre-neutralizing the monomer; and continuously pre-neutralizing the pre-neutralized monomer by a heat exchanger. Heating and continuously post-neutralizing the heated monomer, wherein the monomer solution or suspension before entering the polymerization reactor is at a temperature of 70 to 99° C. and the temperature of the heating medium used in the heat exchanger is less than 160° C., A method of making superabsorbent particles. |