| 摘要 |
Process for preparing polyoxymethylene homo- and copolymers and apparatus suitable for this purpose An apparatus is described for preparing polyoxymethylene homo- and copolymers. This has the following elements: A) reactor ( 1 ) encompassing a polymerization zone ( 2 ) and a deactivation zone ( 3 ) directly downstream thereof for polymerizing and deactivating polyoxymethylene homo- and copolymers in a homogeneous phase in a manner known per se, B) depressurizing assembly ( 4 ), which, if appropriate, has a metering apparatus ( 5 ) for additives for the polymer, C) pelletizer ( 6 ), D) extraction apparatus ( 7 ), and E) if appropriate, a drying apparatus ( 8 ). Use of the apparatus and of the polymerization process carried out therein can achieve particularly low residual monomer contents in a simple manner which saves energy.
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