DES for separating residual catalyst after catalytic polymerization reaction as well as preparation method and optimization method of DES

By preparing and optimizing the eutectic solvent (DES), the high energy consumption and environmental pollution problems of aluminum chloride separation in coal-based PAO production were solved, achieving efficient and environmentally friendly aluminum chloride separation and improving PAO product quality and production efficiency.

CN121736147APending Publication Date: 2026-03-27LUAN CHEMICAL GROUP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-17
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

Existing aluminum chloride separation methods in coal-based PAO production suffer from high energy consumption, environmental pollution, and reduced product quality. In particular, water washing and distillation methods lead to water waste and the introduction of impurity ions, while alkali neutralization methods affect product purity.

Method used

Eutectic solvent (DES) was used as a separation catalyst. By screening hydrogen bond donor and acceptor combinations and combining quantum chemical calculations and molecular simulation techniques, the preparation and composition of DES were optimized to improve the solubility and selectivity of aluminum chloride.

Benefits of technology

It significantly improved the separation efficiency and selectivity of aluminum chloride, reduced environmental pollution, enhanced the quality and economic efficiency of PAO products, and promoted the technological upgrading of coal-based PAO production.

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Abstract

The invention discloses DES for separating a residual catalyst after a catalytic polymerization reaction as well as a preparation method and an optimization method of the DES. The DES comprises a hydrogen bond donor and a hydrogen bond acceptor, and the solubility of the catalyst reaches 20-40g / 100g DES at the temperature of 25-50 DEG C and the pressure of 0.1-1MPa. The preparation method comprises the following steps: screening a hydrogen bond donor and a hydrogen bond receptor, determining reaction conditions through a response surface model, preparing DES, and detecting the performance of the DES to determine whether to adjust a preparation process or re-screen raw materials. The optimization method comprises the following steps: constructing a database containing chemical structures, physical properties and hydrogen bond forming ability information of hydrogen bond donors and acceptors, establishing a structure-performance quantitative model, carrying out structural modification on molecules of the hydrogen bond donors or acceptors, preparing new DES, carrying out performance testing on the new DES, and evaluating the performance improvement effect of the new DES so as to realize optimization of the DES. The special DES and the preparation and optimization method thereof are developed aiming at the characteristics of a coal-based PAO production system for the first time, and particularly, the optimal separation effect close to the limit can be obtained by utilizing the optimization method.
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