Polymer based on phenolic-modified aliphatic structure and preparation method thereof, dispersant

By using a phenol-modified aliphatic polymer preparation method, the stability and dispersibility issues of coal-water slurry dispersants were solved, and polymers with higher molecular weight and steric hindrance were prepared, achieving stable dispersion of the coal-water slurry system.

CN116444742BActive Publication Date: 2026-05-29NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACAD OF SCI
Filing Date
2023-05-23
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing sulfonated acetone-formaldehyde condensate has low electrostatic repulsion and steric hindrance as a dispersant for coal-water slurry, which leads to instability in the coal-water slurry system, easy precipitation, and unsatisfactory dispersibility and stability.

Method used

A polymer with a phenol-modified aliphatic structure was prepared by polycondensation of phenolic compounds, sulfonating agents and aldehydes, followed by acylation with an acyling agent, Menschutkin reaction with dimethylaminoethyl methacrylate, and finally polymerization with a compound containing an alkenyl group.

Benefits of technology

The increased molecular weight and steric hindrance of the coal-water slurry dispersant enhance its dispersibility and stability, resulting in a uniform and stable slurry.

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Abstract

The application provides a polymer based on a phenolic group modified aliphatic structure and a preparation method and application thereof. The preparation method comprises: performing a condensation reaction on a phenolic compound, a sulfonating agent and formaldehyde to obtain a first compound with a phenolic group modified aliphatic structure; performing an acylation reaction on the first compound and an acylating agent to obtain a second compound; performing a Menschutkin reaction on the second compound and dimethylaminoethyl methacrylate to obtain a third compound; and performing a polymerization reaction on the third compound and a compound containing an alkenyl group with the acylating agent as an initiator to obtain the polymer with the phenolic group modified aliphatic structure. The application performs a polymerization reaction on the phenolic group modified aliphatic structure as a main chain to obtain a single-side long-chain or double-side long-chain polymer, so as to further increase the molecular weight and steric hindrance of the prepared polymer. The polymer is used as a dispersant to prepare a coal water slurry, and the coal water slurry has good slurry viscosity, fluidity and stability.
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