Apparatus for Production of Pulverulent Poly(Meth)Acrylate

An apparatus for production of pulverulent poly(meth)acrylate, comprising a reactor (1) for droplet polymerization, having an apparatus for dropletization (5) of a monomer solution for the production of the poly(meth)acrylate, having holes through which the solution is dropletized, an addition point for a gas (13) above the apparatus for dropletization (5), at least one gas withdrawal point (19) on the periphery of the reactor (1) and a fluidized bed (11), wherein the outermost holes through which the solution is dropletized are positioned such that a droplet falling vertically downward falls into the fluidized bed (11) and the hydraulic diameter at the level of the midpoint between the apparatus for dropletization (5) and the gas withdrawal point (19) is at least 10% greater than the hydraulic diameter of the fluidized bed (11), wherein the reactor (1) widens conically above the fluidized bed (11) to its maximum hydraulic diameter and the at least one gas withdrawal point (19) is positioned at the transition from the conical widening above the fluidized bed (11) to the cylindrical wall of the reactor (1), wherein at the upper end of the widening the diameter of the conical widening above the fluidized bed (11) is greater than the diameter of the reactor wall above the conical widening, wherein the reactor wall projects into the conical widening so as to form an annular gap in which the gas withdrawal point is positioned between the conical widening and the reactor wall.