A method for improving the purity of n-methylpyrrolidone
By mixing and stirring liquid alkali and water and then distilling, the problem of removing γ-butyrolactone from N-methylpyrrolidone was solved, achieving efficient and simple purity improvement, which is suitable for electronic products.
CN119912376BActive Publication Date: 2026-07-21JIANGSU TATA RESOURCES RECYCLING CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU TATA RESOURCES RECYCLING CO LTD
- Filing Date
- 2025-01-21
- Publication Date
- 2026-07-21
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Figure CN119912376B_ABST
Abstract
The application discloses a method for improving the purity of N-methylpyrrolidone, and belongs to the technical field of N-methylpyrrolidone purification, and has the technical scheme as follows: a method for improving the purity of N-methylpyrrolidone, comprising the following steps: adding liquid alkali into water, mixing thoroughly, adding N-methylpyrrolidone stock solution, stirring, sampling the mixed solution, and performing gas chromatography detection; and performing rectification on the mixed solution with zero gamma-butyrolactone to obtain N-methylpyrrolidone finished product, so that the content of gamma-butyrolactone in N-methylpyrrolidone can be conveniently and quickly reduced.
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