An apparatus and method for reducing water content in a polymer polyol recovery solvent
By combining a series distillation column and an oil-water separator, the problem of excessive water content in the recovered solvent is solved by utilizing azeotropic distillation and oil-water separation technologies, achieving efficient solvent recovery and cost savings.
CN122164113APending Publication Date: 2026-06-09CHINA PETROLEUM & CHEMICAL CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2024-12-06
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
In the production of polymer polyols, excessive moisture content in the recycled solvent affects the reaction process and cannot be directly recycled, leading to increased costs.
Method used
By employing at least two distillation columns and an oil-water separator connected in series, light and heavy components are separated and the water content is reduced through azeotropic distillation and oil-water separation. The partial miscibility of water with other components is utilized to achieve efficient water removal.
Benefits of technology
It effectively reduces the moisture content in the recovered solvent to less than or equal to 1000 ppm, maximizes solvent recovery, avoids moisture accumulation affecting the reaction, saves raw materials and reduces production costs.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122164113A_ABST
Abstract
The application provides a device and a method for reducing water content in a polymer polyol recovery solvent, the device comprising at least two rectifying towers and at least one oil-water separator; the rectifying towers are connected in series; a condenser is arranged at a discharge port of a top of the rectifying tower, a flow after condensation of the condenser is partially refluxed and partially sent to a next rectifying tower or the oil-water separator; the oil-water separator refluxes separated water-lean materials and discharges separated water-rich materials; and materials discharged from a tank of the rectifying tower are used as the recovery solvent. The device provided by the application not only realizes removal of water in the recovery solvent, but also maximizes recovery of the recovery solvent, reduces cost, and avoids waste of resources.
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