A natural ester insulating oil and a method for producing the same

By using atomized jet mixing and gradient quenching processes, non-equilibrium solvation dispersion of polymethacrylate pour point depressant in natural ester insulating oil is achieved, solving the problems of low-temperature fluidity and filter blockage in natural ester insulating oil, and improving the safety and stability of electrical equipment.

CN121825636BActive Publication Date: 2026-07-21GUANGZHOU GUANGRUNSHIDA BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202610041079.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-13
Publication Date
2026-07-21
Estimated Expiration
2046-01-13

AI Technical Summary

Technical Problem

Existing natural ester insulating oils are prone to crystallization and precipitation at low temperatures, resulting in poor fluidity. Furthermore, polymeric pour point depressants are unevenly dispersed in the base oil, forming micro-agglomerates, which increases the tendency for filter blockage and affects the safety and stability of electrical equipment.

Method used

By employing a combination of fluid dynamics control and thermodynamic locking, non-equilibrium solvation dispersion of polymethacrylate pour point depressant in natural ester-based oils is achieved through atomized jet mixing and gradient quenching processes. High-temperature mechanical shearing and rapid cooling are used to construct a micro-dispersion structure, ensuring that the polymer molecular chains are stretched and embedded in the base oil, thus avoiding agglomeration.

Benefits of technology

This method improves the fluidity and electrical stability of natural ester insulating oil at low temperatures, reduces the tendency of filters to clog, ensures the safe operation of power equipment, and does not affect the dielectric properties and oxidation stability of the oil.

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Abstract

The application relates to the technical field of electrical insulation materials, and discloses a natural ester insulating oil and a preparation method thereof, the preparation method of the natural ester insulating oil comprising the following steps: preparing a composite pour point depressant mother liquor containing polymethyl acrylate and an intermolecular spacer; atomizing and injecting the composite pour point depressant mother liquor into a base oil flow for online mixing, and controlling the momentum flux ratio to be 5-20; gradient quenching the mixed oil flow, and controlling the cooling rate to be 6-15 DEG C / min. According to the application, fluid mechanics control and thermodynamics locking are adopted, so that the polymethyl acrylate pour point depressant is in a non-equilibrium state solvated dispersion structure in the base oil. The obtained insulating oil has a filter blocking tendency value less than 1.05, the application has excellent low-temperature fluidity and micro cleanliness, solves the problems of uneven dispersion and easy agglomeration of the polymer pour point depressant in the natural ester, and is suitable for high-voltage power equipment.
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