一种从丙烯腈电解产物精馏残液中萃取分离己二腈和己烷三腈的方法
By using a composite extractant consisting of benzene, ester, and alcohol solvents, the problem of separating adiponitrile and hexanetrionitrile in the distillation residue of acrylonitrile electrolysis products was solved, achieving efficient recovery, extending equipment operating cycle, and reducing separation costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- EAST CHINA UNIV OF SCI & TECH
- Filing Date
- 2025-12-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to efficiently separate and recover adiponitrile and hexanetrionitrile from the distillation residues of acrylonitrile electrolysis products, leading to resource waste and equipment blockage. Furthermore, there is a lack of a complete separation method suitable for industrial applications.
A composite extractant composed of benzene, ester, and alcohol solvents is used to selectively dissolve adiponitrile and hexanetrionitrile through composite extraction, cooling phase separation, and distillation steps. The extractant is then recovered by distillation, achieving efficient removal of polymers and separation of products.
It achieves high-purity recovery of adiponitrile and hexanetrionitrile, with a polymer removal rate of 98.59%, extends equipment operating cycle, reduces separation costs and energy consumption, and improves resource utilization and economic benefits.