PROCESS FOR PRODUCING WATER-ABSORBENT POLYMER PARTICLES BY POLYMERIZING DROPLETS OF A MONOMER SOLUTION
申请人:BASF SE
公开号:US20160332140A1
公开(公告)日:2016-11-17
The present invention relates to a process for producing water-absorbent polymer particles by polymerizing droplets of a monomer solution in a surrounding heated gas phase in a reactor comprising a gas distributor (
3
), a reaction zone (
5
) and a fluidized bed (
27
), the gas leaving the reactor is treated in a condenser column (
12
) with an aqueous solution, the treated gas leaving the condenser column (
12
) is recycled at least partly to the fluidized bed (
27
), wherein the gas leaving the condenser column (
12
) comprises from 0.05 to 0.3 kg steam per kg dry gas and the steam content of the gas entering the gas distributor (
3
) is less than 80% of the steam content of the gas leaving the condenser column (
12
).