A method for separating acetonitrile from acetonitrile-containing wastewater
By using ester compound extractants and a double distillation column in series, the problems of large extractant consumption and high energy consumption in acetonitrile-water separation were solved, achieving high recovery rate of high-purity acetonitrile and improved environmental friendliness.
CN122036552BActive Publication Date: 2026-07-21EAST CHINA UNIV OF SCI & TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- EAST CHINA UNIV OF SCI & TECH
- Filing Date
- 2026-04-16
- Publication Date
- 2026-07-21
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Abstract
The application discloses a method for separating acetonitrile from acetonitrile-containing wastewater, which comprises the following steps: S1 extraction: multi-stage countercurrent extraction is performed on the acetonitrile-containing wastewater in an extraction tower by using ester compounds as extractants, and an organic phase rich in acetonitrile and a water-rich phase are separated; S2 rectification: the organic phase obtained in the step S1 is sent into a rectification unit for rectification, acetonitrile products are separated, and the extractant is recovered and recycled. The method utilizes the inherent hydrophobic characteristics of the ester compounds and the excellent affinity between the ester compounds and acetonitrile molecules, realizes high-selectivity extraction of acetonitrile in the acetonitrile-water system, and finally obtains high-purity acetonitrile products by rectifying and separating the acetonitrile-rich organic phase obtained through extraction, and realizes high recovery rate of acetonitrile.
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