A process for the synthesis of methyl ethyl phenolic resin

By employing efficient distillation and refining processes, 3,4-methylethylphenol and m-tert-butylphenol are extracted from crude phenol distillation residue, generating high-purity methylethylphenol resin and p-tert-butylphenol. This solves the problem of low resource utilization in crude phenol distillation residue and achieves efficient and economical comprehensive resource utilization.

CN122302196APending Publication Date: 2026-06-30CCTEG CHINA COAL RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CCTEG CHINA COAL RES INST
Filing Date
2026-03-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing technologies, the utilization rate of 3,4-methylethylphenol and m-tert-butylphenol, which are relatively large amounts in crude phenol distillation residues, is low, and their reactivity in phenolic resins cannot be effectively utilized, resulting in resource waste.

Method used

3,4-methylethylphenol and m-tert-butylphenol are extracted from the crude phenol distillation residue by high-efficiency distillation, and then further purified to obtain high-purity 3,4-methylethylphenol. It is then used to react with formaldehyde to generate linear phenolic resin, and unreacted p-tert-butylphenol is distilled off during the dehydration process, thus achieving the extraction of p-tert-butylphenol.

Benefits of technology

This method achieves efficient synthesis of phenolic resins while producing high-purity 3,4-methylethylphenol and p-tert-butylphenol as byproducts, thus improving resource utilization and producing high-value-added products. The process is simple and economically efficient.

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Abstract

This application belongs to the field of organic synthesis technology, specifically relating to a method for synthesizing ethyl phenol formaldehyde resin. The method includes the following steps: separating crude phenol distillation residue by distillation to obtain a mixture containing 3,4-methylethylphenol; mixing the mixture containing 3,4-methylethylphenol with a first solvent and subjecting it to cooling crystallization treatment, followed by centrifugation and filtration to obtain 3,4-methylethylphenol; reacting the above mixture containing 3,4-methylethylphenol, or 3,4-methylethylphenol, a catalyst, and aldehyde compounds, and after the reaction is complete, dehydrating to obtain ethyl phenol formaldehyde resin. The beneficial effects of this application include: the method for synthesizing ethyl phenol formaldehyde resin utilizes the differences in reactivity between various phenols in the 3,4-methylethylphenol mixture and formaldehyde to produce continuous ethyl phenol formaldehyde resin; unreacted p-tert-butylphenol and other components are distilled off, purified, and refined to produce high-quality products. The process is simple, convenient to operate, and has high added value, enabling comprehensive utilization of waste.
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