Method for producing polyether polyols, method for producing polyurethane resins

The batch reactor design with a stirring member and dual cooling system ensures efficient heat exchange at low liquid levels, addressing productivity issues in polyether polyol production by maintaining cooling capacity, thus facilitating high molecular weight polyether polyol production with improved efficiency.

JP7877825B2Active Publication Date: 2026-06-23AGC INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
AGC INC
Filing Date
2022-05-20
Publication Date
2026-06-23

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Abstract

To provide a method for producing polyether polyol which easily achieves high productivity, and a method for producing a polyurethane resin using the polyether polyol obtained by the production method.SOLUTION: A method for producing polyether polyol uses a batch type reactor 20A having a reaction tank 10 for reacting a catalyst with a mixed liquid containing cyclic ether, a cooling system for cooling the mixed liquid in the reaction tank 10 and stirring blades 2 and 2 for stirring the mixed liquid in the reaction tank 10, and has a member 2c which is a passage where the stirring blades 2 emit the mixed liquid toward the inner wall surface of the reaction tank 10 while moving the mixed liquid in the vicinity of a liquid surface in the reaction tank 10 by rotation in stirring upward.SELECTED DRAWING: Figure 1
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